ВЗАЄМОДІЯ РОСЛИН ЛЮПИНУ ЗІ ШТАМАМИ БУЛЬБОЧКОВИХ БАКТЕРІЙ РОДУ BRADYRHIZOBIUM

Objective. Study the peculiarities of the interaction between three species of lupin and nodule bacteria of the genus Bradyrhizobium, isolated from various leguminous plants: lupin, seradella, soybean and cowpea. Methods. Microbiological (isolation of rhizobia from nodules and their cultivation), se...

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Date:2024
Main Author: Крутило, Д. В.
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Language:English
Published: Institute of Agrocultural Microbiology and Agro-industrial Manufacture of NAAS of Ukraine 2024
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Journal Title:Agriciltural microbiology
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Agriciltural microbiology
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author Крутило, Д. В.
author_facet Крутило, Д. В.
author_institution_txt_mv [ { "author": "Д. В. Крутило", "institution": "Інститут сільськогосподарської мікробіології та агропромислового виробництва НААН" } ]
author_sort Крутило, Д. В.
baseUrl_str https://smic.in.ua/index.php/journal/oai
collection OJS
datestamp_date 2026-07-22T10:10:52Z
description Objective. Study the peculiarities of the interaction between three species of lupin and nodule bacteria of the genus Bradyrhizobium, isolated from various leguminous plants: lupin, seradella, soybean and cowpea. Methods. Microbiological (isolation of rhizobia from nodules and their cultivation), serological (defining serological affiliation of strains), vegetation experiment (study of host specificity of bradyrhizobia, study of the formation and functioning of the symbiosis between lupin and nodule bacteria), gas chromatographic (determination of the activity of symbiotic nitrogen fixation), mathematical and statistical. Results. Under the conditions of vegetation experiments on sod-podzolic soil and sterile vermiculite, the peculiarities of the interaction between different species of lupin and specific and non-specific strains of nodule bacteria of the genus Bradyrhizobium were studied. It was established that rhizobia isolated from lupin nodules (B. lupini 367a, 30l, LD4 and Bradyrhizobium sp. LD8), seradella (Bradyrhizobium sp. СР1) and soybean (B. lupini 631) are able to form an active symbiosis with white and yellow lupin plants. Microsymbionts of soybean (B. japonicum КВ11) and cowpea (B. diazoefficiens В22) did not infect these two species of lupin. In the experiment with narrow-leaved lupin, all strains of B. lupini (367а, 30l, LD4, 631) and LD8 Bradyrhizobium sp. ensured a reliable increase in the above-ground mass of plants by 14.3–22.6 % compared to the control. The maximum values of this indicator were obtained in variants inoculated with B. lupini LD4 and B. lupine 631 strains (1.03 and 1.02 g/plant versus 0.84 g/plant in the control). With the use of non-specific lupin strains B. japonicum КВ11 and B. diazoefficiens В22, a significant increase in the nitrogenase activity of nodules was registered (1.5 and 1.9 times compared to the control), however, the increase in the above-ground mass of plants was insignificant — 7.1 % and 10.7 %, respectively. Conclusion. It has been established that lupin-specific bradyrhizobia of various origins (B. lupini and Bradyrhizobium sp.) have a positive effect on the formation of the symbiotic apparatus, the growth and development of white, yellow and narrowleaved lupin plants. Rhizobia of soybean and cowpea (B. japonicum КВ11 and B. diazoefficiens В22) non-specific for lupin, contribute to the activation of the interaction between narrowleaved lupin and representatives of the soil population of B. lupini and act as PGPR microorganisms. B. lupini LD4 and B. lupini 631 strains are the best in terms of most symbiotic indicators and efficiency of symbiosis with narrow-leaved lupin.
doi_str_mv 10.35868/1997-3004.39.22-36
first_indexed 2025-07-17T12:26:50Z
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fulltext 22 Сільськогосподарська мікробіологія. 2024. Вип. 39. С. 22–36. ISSN 1997-3004 https://doi.org/10.35868/1997-3004.39.22-36 UDC 582.73:582.23:579.8:579.2 INTERACTION BETWEEN LUPIN PLANTS AND STRAINS OF THE BRADYRHIZOBIUM GENUS D. V. Krutylo Institute of Agricultural Microbiology and Agroindustrial Manufacture, NAAS 97 Shevchenka Str., Chernihiv, 14030, Ukraine; e-mail: krutylodv@gmail.com Objective. Study the peculiarities of the interaction between three species of lupin and nodule bacteria of the genus Bradyrhizobium, isolated from various leguminous plants: lupin, seradella, soybean and cowpea. Methods. Microbiological (isolation of rhizobia from nodules and their culti- vation), serological (defining serological affiliation of strains), vegetation experiment (study of host specificity of bradyrhizobia, study of the formation and functioning of the symbiosis between lupin and nodule bacteria), gas chromatographic (determination of the activity of symbiotic nitrogen fixation), mathematical and statistical. Results. Under the conditions of vegetation experiments on sod-podzolic soil and sterile vermiculite, the peculiarities of the interaction between different spe- cies of lupin and specific and non-specific strains of nodule bacteria of the genus Bradyrhizobium were studied. It was established that rhizobia isolated from lupin nodules (B. lupini 367a, 30l, LD4 and Bradyrhizobium sp. LD8), seradella (Bradyrhizobium sp. СР1) and soybean (B. lupini 631) are able to form an active symbiosis with white and yellow lupin plants. Microsymbionts of soybean (B. japonicum КВ11) and cowpea (B. diazoefficiens В22) did not infect these two species of lupin. In the experiment with narrow-leaved lupin, all strains of B. lupini (367а, 30l, LD4, 631) and LD8 Bradyrhizobium sp. ensured a reliable increase in the above-ground mass of plants by 14.3–22.6 % compared to the control. The maximum values of this indicator were obtained in variants inocu- lated with B. lupini LD4 and B. lupine 631 strains (1.03 and 1.02 g/plant versus 0.84 g/plant in the control). With the use of non-specific lupin strains B. japonicum КВ11 and B. diazoefficiens В22, a significant increase in the nitrogenase activity of nodules was registered (1.5 and 1.9 times compared to the control), however, the increase in the above-ground mass of plants was insignifi- cant — 7.1 % and 10.7 %, respectively. Conclusion. It has been established that lupin-specific bradyrhizobia of various origins (B. lupini and Bradyrhizobium sp.) have a positive effect on the formation of the symbiotic apparatus, the growth and development of white, yellow and narrow- leaved lupin plants. Rhizobia of soybean and cowpea (B. japonicum КВ11 and B. diazoeffici- ens В22) non-specific for lupin, contribute to the activation of the interaction between narrow- leaved lupin and representatives of the soil population of B. lupini and act as PGPR microorgan- isms. B. lupini LD4 and B. lupini 631 strains are the best in terms of most symbiotic indicators and efficiency of symbiosis with narrow-leaved lupin. Key words: nodule bacteria, Bradyrhizobium lupini, B. japonicum, B. diazoefficiens, lupin, symbiotic interactions. Introduction. Lupin (Lupinus L.) it is a ge- nus of the legume family Fabaceae (Legumi- nose), which includes more than 200 species of annual and perennial plants (grasses, subshrubs, shrubs) [1; 2]. Due to its ability to symbiosis with nodule bacteria and fixation of molecular nitrogen, lupin is an important agricultural crop with significant biological and economic poten- tial, which is widely used as a source of protein in human and animal nutrition and is a good green manure [3; 4]. In world agricultural prac- tice, only a few annual species of lupin have be- come the most widespread: L. albus (white lu- pin), L. luteus (yellow lupin), L. angustifolius (narrow-leaved or blue lupin) and L. mutabilis (pearl lupin) [3]. Perennial species are mainly © D. V. Krutylo, 2024 23 used as ornamental plants. In Ukraine, high- yielding varieties of white, yellow and narrow- leaved lupin are grown to solve the problem of fodder protein [5]. There are 7 species of lupin in the wild. Analysis of recent studies and publica- tions. Considering that in Ukraine, lupin has been grown as a sidereal and fodder crop since the beginning of the 20th century [5; 6], stable local populations of nodule bacteria capable of forming symbiosis with this plant have been formed in the soil. Lupin microsymbionts of on- ly one species — B. lupini [7–9] are described in domestic literature. Previously, we isolated several strains from peanut nodules that, in ad- dition to the host plant, infect white and yellow lupin, as well as a strain that additionally forms nodules on soybean roots [9]. These strains are assigned to the genus Bradyrhizobium, but their species needs clarification. In general, the diver- sity of lupin rhizobia in the soils of Ukraine re- mains poorly studied. The analysis of literary sources devoted to the study of nodule bacteria of lupin in different countries shows that this plant is characterized by wide specificity and is able to form a symbi- osis with many species of nitrogen-fixing bacte- ria [10]. The great diversity of lupin species re- flects the great diversity of their microsymbi- onts. Currently, both slow-growing and fast- growing nodule bacteria capable of nodulating lupin have been described. It has been estab- lished that slow-growing representatives of the genus Bradyrhizobium predominate in the no- dules of various lupin species: B. lupini [11–13], B. japonicum [11; 13; 14], B. diazoefficiens [13], B. elkanii [15], B. canariense [16], B. valenti- num [17], B. cytisi [13] and B. hipponense [18]. It was also found that the roots of European lu- pin species are usually infected by B. canari- ense and B. japonicum [19], and American ones by B. japonicum and B. elkanii [17]. Despite that the predominant microsymbi- onts of lupin are bradyrhizobia, fast-growing nodule bacteria were also found in their nodule populations. For example, in Morocco and Po- land, rhizobia belonging to the genera Allorhi- zobium, Sinorhizobium and Rhizobium were iso- lated from nodules on the roots of lupin plants [20; 21]. In the Tunisian soils, white lupin was infected by bacteria of the genera Rhizobium and Neorhizobium [22]. Representatives of ge- nera are also described among fast-growing microorganisms, namely Mesorhizobium (M. lo- ti) [23], Agrobacterium [22], Phyllobacterium (P. trifolii) [11; 24], Ochrobactrum (O. lupini) [25], Microvirga (M. tunisiensis, M. lupini) [11; 26; 27] and Devosia (Devosia sp.) [28]. It should be noted that the above microor- ganisms are able to infect not only lupin, but also other species of legumes, forming different groups of cross-inoculation. For example, no- dule bacteria B. japonicum, B. diazoefficiens, B. elkanii, in addition to lupin, form nitrogen- fixing nodules on the roots of soybean, cowpea and mung bean plants [10; 29–31]. Among the bacteria of the species B. lupini (formerly Bra- dyrhizobium sp. (Lupinus)), microsymbionts of soybean [32], seradella [33] and peanut [9] have also been described. Representatives of other genera of nodule bacteria can also migrate bet- ween legumes and form different ranges of host plants. Under such conditions, the specificity of bacteria in relation to leguminous plants will be different, and the efficiency of symbiotic sys- tems may differ significantly. In the domestic literature, no information on the formation of an effective symbiosis be- tween lupin and various species of specific and non-specific nodule bacteria is available. Con- sidering the above, the objective of our work was to study the specifics of the interaction between three species of lupin and nodule bacte- ria of the genus Bradyrhizobium isolated from various leguminous plants: lupin, seradella, soy- bean and cowpea. Materials and methods. The objects of re- search were strains of lupin nodule bacteria (B. lupini 367a (standard), B. lupini 30l, B. lupi- ni LD4, B. lupini 631, Bradyrhizobium sp. LD8); strains isolated from nodules of seradella (Bradyrhizobium sp. CP1), cowpea (B. diazoef- ficiens B22) and soybean (B. japonicum 46, B. japonicum КВ11); plants of narrow-leaved lupin (Lupinus angustifolius L.), white lupin (Lupinus albus L.), yellow lupin (Lupinus luteus L.), truncated lupin (Lupinus truncatus Hook. & Arn.), fleshy lupin (Lupinus subcarnosus Hook.) and seradella (Ornithopus sativus Brot.). Lupin and seradella seeds were provided by the Department of Scientific Support for Agroin- dustrial Manufacture of the Institute of Agri- cultural Microbiology and Agroindustrial Ma- nufacture of the National Academy of Agra- rian Sciences (IAMAM NAAS), Polissia Insti- tute of Agriculture of the National Academy of ISSN 1997-3004 Сільськогосподарська мікробіологія. 2024. Вип. 39. 24 Agrarian Sciences and Ternopil National Peda- gogical University named after Volodymyr Hnatiuk. Bradyrhizobia strains are stored in the collection of the Laboratory of Plant-Microbial Interactions and in the Collection of Beneficial Soil Microorganisms of the IAMAM NAAS. Isolation of nodule bacteria from lupin and seradella nodules and study of their morpholo- gical and cultural properties was carried out ac- cording to methodical recommendations [34]. The serological affiliation of the strains iso- lated from different leguminous plants was de- termined in the agglutination reaction according to the Gruber-Widal method [35]. Bradyrhizo- bia were grown on solid legume medium at 28 °С. In the logarithmic phase of growth, the bacterial mass was washed off the agar slopes, precipitated by centrifugation and washed twice with normal saline solution. 5 mL of saline solu- tion and 5 mL of 2.5 % glutaraldehyde solution (to remove non-specific flagellar H-antigens) were added to the cell sediment and left in a re- frigerator for a day. A day later, the bacterial cells (antigen) were washed three times from glutaraldehyde, the sediment was resuspended with saline solution and the antigen titre was brought up to 2·109 cells/mL. Specific immune anti-nodule bacteria obtained with lupin (367a, 631), soybean (46, M8, КВ11, 634b, OR, HR, NR) and cowpea (B1 and B2) strains were used. The ability of bradyrhizobia strains to enter into symbiosis with white lupin (Lybid variety) and yellow lupin (Chernihivets variety) was studied in a vegetation experiment. Plants were grown in 2 litre vessels on a nitrogen-free sub- strate (sterile vermiculite), which was moistened with a 0.2 % solution of КН2РО4. Before sow- ing, surface sterilized seeds were treated with a suspension of nodule bacteria (titre 2·109 cells/mL). The inoculation load was 200– 300 thousand cells per 1 seed. The repetition of the experiment was fourfold. Humidity was maintained at 60 % maximum water-holding capacity. The interaction between bradyrhizobia and narrow-leaved lupin was studied under growing conditions on sod-podzolic soil (soil samples were taken in the fields of the IAMAM NAAS). Nodule bacteria were cultivated for 72 hours in 750 mL flasks on a rocker (220 rpm) at 26– 28 °C in a liquid bean medium [34]. Lupin seeds of the Lokomotyv narrow-leaved variety were treated with the studied strains. The inocu- lation load was 200–300 thousand cells per 1 seed. In the control variant, the seeds were moistened with tap water. The repetition of the experiment was fivefold. Humidity was main- tained at 60 % maximum water-holding capa- city [36]. The activity and efficiency of legume-rhi- zobial symbiosis was evaluated in the flowering phase according to the following parameters: plant height, weight of dry matter of the aerial part of plants, number and weight of nodules, activity of symbiotic nitrogen fixation. Vegetation experiment on the stimulating effect of nodule bacteria of lupin and soybean on plants of the white lupin of Lybid variety was carried out on a nitrogen-free substrate (vermiculite) moistened with a 0.2 % solution of КН2РО4. Before sowing, the seeds were treated with strains of B. lupini 367a, B. japonicum 46 and B. japonicum КВ11. The inoculation load was 200–300 thousand cells per 1 seed. In the control variant, the seeds were moistened with tap water. The repetition of the experiment was fivefold. Humidity was maintained at 60 % ma- ximum water-holding capacity. The nitrogenase activity of nodules was de- termined by the acetylene-ethylene method [37] on a Chrom-4 gas chromatograph with a flame ionization detector (column with β-β΄-oxydipro- pionitrile). Processing of experimental data was carried out using methods of mathematical statistics [38], Microsoft Office Excel 2016 and Statisti- ca 8.0. Results and discussion. To study the inte- raction between nodule bacteria and narrow- leaved lupin plants, we have selected strains of various species, representatives of which, ac- cording to literature data, are or may be poten- tial microsymbionts of lupin. In the work, 8 strains of bradyrhizobia were studied, isolated from nodules of lupin, seradella, soybean and cowpea (Table 1). Both new and collection strains were used (B. lupini 367а, 30l, 631, B. japonicum КВ11). It should be noted that the four studied strains of lupin nodule bacteria are microsymbi- onts of different host plants. For example, strains B. lupini 367a and B. lupini 30l were iso- lated from nodules of narrow-leaved lupin and yellow lupin, respectively. It was established that despite their different origin, both strains belong to the same serogroup 367a (Table 1). ISSN 1997-3004 Сільськогосподарська мікробіологія. 2024. Вип. 39. 25 Table 1. Characteristics of nodule bacteria of the genus Bradyrhizobium isolated from no- dules of various leguminous plans Species of microorganisms Host plant Serogroup Formation of active nodules on roots: Lupinus albus Lupinus luteus B. lupini 367а Lupinus angustifolius 367а + + B. lupini 30l Lupinus luteus 367а + + B. lupini LD4 Lupinus truncatus × + + Bradyrhizobium sp. LD8 Lupinus subcarnosus × + + Bradyrhizobium sp. СР1 Ornithopus sativus 367а + + B. lupini 631 Glycine max 631 + + B. japonicum КВ11 Glycine max КВ11 – – B. diazoefficiens В22 Vigna unguiculata В2 – – Notes: × — unspecified serogroup; + — formation of nitrogen-fixing nodules; – — no nodules. We have isolated two new strains, LD4 and LD8, from truncated and fleshy lupin nodules, respectively. They form colonies 2–3 mm in di- ameter, which appear on solid bean medium at Day 5 to 6 of cultivation. According to the mor- phology, at Day 7 of growth, bacterial cells are mobile, slightly bent gram-negative rods, which do not form spores. Cultures acidify the milk with litmus, but do not form a zone of serum on the surface. No growth on MPA was registered. According to the morphological and cultural properties, the strains are classified as Bradyrhi- zobium. In previous studies, the LD4 strain was identified as B. lupini based on the results of se- quencing of the ITS region [39]. Strains of B. lupini LD4 and Bradyrhizobium sp. LD8 did not react with any of the 11 antisera used, their serological affiliation remains uncertain. According to our research, strain CP1, iso- lated from nodules of seradella, also had charac- teristic signs of bradyrhizobia. In the agglutina- tion reaction, it reacted positively with antise- rum 367a, obtained against the standard strain B. lupini 367a. Additional research is needed to determine its species affiliation. It should be noted that B. lupini 367a, B. lu- pini 30l and Bradyrhizobium sp. CP1 showed a weak positive reaction with КВ11 antiserum, which suggests the presence of antigenic deter- minants shared with the soybean rhizobia strain B. japonicum КВ11. We have also used the well-known strain of nodule bacteria Bradyrhizobium sp. 631 isolated from soybean nodules. It is interesting because it can form nodules both on soybean and lupin roots [32]. According to the results of sequen- cing of the intergenic ITS region, strain 631 was assigned to the species B. lupini [39]. According to antigenic properties, this strain belongs to serogroup 631. Since it is known from the literature that nodule bacteria B. japonicum and B. diazoeffi- ciens are able to nodulate lupin [11; 13; 14], we chose two strains that belong to these species for the study. They were isolated from soybean nodules (B. japonicum КВ11) and cowpea (B. diazoefficiens B22) and belong to serogro- ups КВ11 and B2, respectively. Under the conditions of the vegetation ex- periment on vermiculite, it was established that all bradyrhizobia strains isolated from lupin nodules (B. lupini 367а, 30l, LD4 and Bradyrhi- zobium sp. LD8) and seradella (Bradyrhizobi- um sp. CP1), as well as B. lupini 631, formed active red nodules on the roots of white and yel- low lupin (Table 1). Microsymbionts of soybean (B. japonicum КВ11) and cowpea (B. diazoeffi- ciens В22) did not infect these two species of lupin. The next stage of our work was to investi- gate the peculiarities of the interaction between microsymbionts of various leguminous crops and narrow-leaved lupin. The data obtained in the vegetation experiment are shown in the Table 2. It was established that a significant number of nodules were formed on the roots of non-ino- culated plants of narrow-leaved lupin, namely ISSN 1997-3004 Сільськогосподарська мікробіологія. 2024. Вип. 39. 26 Table 2. Influence of inoculation with Bradyrhizobium strains on symbiotic indicators of narrow-leaved lupin of Lokomotyv variety (vegetation experiment, sod-podzolic soil) Variants of the experi- ment Host plant Number of nodules Weight of nodules units/plant % versus control g/plant % versus control Without inoculation (control) – 54.73 ± 1.36 – 0.23 ± 0.01 – Inoculation with B. lupini 367а lupin 57.00 ± 1.41 4.1 0.29 ± 0.01* 26.1 Inoculation with B. lupini 30l 59.73 ± 1.26* 9.1 0.28 ± 0.01* 21.7 Inoculation with B. lupini LD4 57.60 ± 1.09 5.2 0.31 ± 0.02* 34.8 Inoculation with Bradyrhizobium sp. LD8 57.27 ± 1.14 4.6 0.29 ± 0.01* 26.1 Inoculation with Bradyrhizobium sp. СР1 seradella 61.00 ± 1.10* 11.5 0.28 ± 0.01* 21.7 Inoculation with B. lupini 631 soybean 59.60 ± 1.26* 8.9 0.31 ± 0.01* 34.8 Inoculation with B. japonicum КВ11 soybean 56.87 ± 1.53 3.8 0.29 ± 0.01* 26.1 Inoculation with B. diazoefficiens В22 cowpea 57.20 ± 0.63 4.5 0.31 ± 0.01* 34.8 НІР05 3.52 0.04 Note. * — significant increase versus control. 55 units/plant. This fact indicates the presence of a population of nodule bacteria capable of nodulating lupin in the soil. Against the background of spontaneous in- fection of the roots of narrow-leaved lupin, all studied strains, regardless of their origin, con- tributed to the formation of a greater number of nodules compared to the control. A significant increase in this indicator by 9.1–11.5 % was re- gistered after inoculation with B. lupini 30l and B. lupini 631, as well as with the strain of serogroup 367a isolated from the nodules of se- radella — Bradyrhizobium sp. СР1. The fact that microsymbionts of lupin and seradella can cross-infect these leguminous plants is men- tioned in the works of a number of researchers [16; 33]. Bradyrhizobia strains isolated from lupin, seradella, cowpea and soybean contributed to a significant increase in the weight of narrow- leaved lupin nodules by 21.7–34.8 % versus the control (Table 2). It is important to note that this indicator increased not only with the use of spe- cific bacteria of B. lupini species, but also strains of other species: B. japonicum КВ11 (by 26.1 %) and B. diazoefficiens В22 (by 34.8 %). In addition to the positive effect on the number and weight of nodules, the inoculation of lupin seeds contributed to a significant inten- sification of the process of symbiotic nitrogen fixation (Fig. 1). A significant increase in nitro- gen-fixing activity versus the control was regis- tered when using strains of Bradyrhizobium sp. LD8 (by 58.2 %) and B. lupini 631 (by 85.8 %), capable of infecting lupins, as well as strains of soybean nodule bacteria B. japonicum КВ11 (by 48.6 %) and B. diazoefficiens B22 (by 87.6 %). Other strains — typical nodule bacteria of lupin: B. lupini 367a, B. lupini 30l, B. lupini LD4 in- creased this indicator only by 11.3–23.8 %. The studied bradyrhizobia contributed to the improvement of the growth and deve- lopment of lupin plants. Thus, the greatest reli- able increase in plant height was registered when treating seeds with strains isolated from lupin nodules (B. lupini 367a, B. lupini 301, ISSN 1997-3004 Сільськогосподарська мікробіологія. 2024. Вип. 39. 27 Host plant → [ lupin ] [seradella] [soybean] [soybean] [cowpea] Figure 1. Nitrogenase activity of lupin nodules of the Lokomotyv narrow-leaved variety after inoculation with bradyrhizobia strains of different species (vegetation experiment, sod-podzolic soil). НІР05 = 0.84. * — significant increase versus control. B. lupini LD4, Bradyrhizobium sp. LD8) — 10.4–13.7 % and soybean nodules (B. lupi- ni 631) — 12.9 % (Table 3). A slight increase in this indicator (by 5.8–6.8 %) was reported after inoculation with another strain from soybean nodules, but of a different species (B. japoni- cum КВ11), as well as with microsymbionts of seradella (Bradyrhizobium sp. CP1) and cowpea (B. diazoefficiens B22). The use of bradyrhizobia strains isolated from various leguminous plants had a positive effect on the content of dry matter in the above- ground mass of narrow-leaved lupin. Against the background of a large local population of lupin nodule bacteria, all specific strains of the species B. lupini (367a, 30l, LD4, 631) and Bradyrhizobium sp. LD8 provided a reliable in- crease in the above-ground mass of plants ver- sus the control by 14.3–22.6 %. The maximum values of this indicator were obtained in variants inoculated with B. lupini LD4 and B. lupini 631 (1.03 and 1.02 g/plant vs. 0.84 g/plant in the control), which proved to be better for most symbiotic traits. Despite the high nitrogenase activity of lupin nodules with the strains B. ja- ponicum КВ11 and B. diazoefficiens В22, the increase in the above-ground mass of plants ver- sus the control was lower and amounted to 7.1 % and 10.7 %, respectively. We have also studied the influence of non- specific nodule bacteria of the species B. japo- nicum on white lupin plants. Lupin seeds were inoculated with two highly active strains of soy- bean rhizobia — B. japonicum КВ11 and B. ja- ponicum 46. The use of a sterile substrate (ver- miculite) in the vegetation experiment made it possible to neutralize the effect of representa- tives of local populations of lupin microsymbi- onts present in the soil on plants. The obtained data proved that the studied strains of soybean rhizobia are not capable of infecting white lupin (Table 4). Nitrogen-fixing nodules on the roots (22 units/plant) were formed only when seeds were inoculated with a specific strain of nodule bacteria — B. lupi- ni 367a, while the above-ground mass of lupin plants increased by 60.0 % versus the control (without inoculation). In variants with soybean 2,82 3,14 3,17 3,49 4,46 3,65 5,24 4,19 5,29 0 1 2 3 4 5 6 W ith ou t i no cu la tio n (c on tro l) B. lu pi ni 3 67 а B . l up in i 3 0l B . l up in i L D 4 B ra dy rh iz ob iu m sp . L D 8 Br ad yr hi zo bi um sp . С Р1 B . l up in i 6 31 B. ja po ni cu m К В1 1 B. di az oe ffi ci en s В 22 μg N /p la nt p er h ou r * * * * B. lu pi ni B. lu pi ni B. lu pi ni B. lu pi ni Br ad yr hi zo bi um B. ja po ni cu m Br ad yr hi zo bi um B. d ia zo ef fic ie ns ISSN 1997-3004 Сільськогосподарська мікробіологія. 2024. Вип. 39. 28 Table 3. Influence of inoculation with Bradyrhizobium strains on growth and development of lupin plants of narrow-leaved Lokomotyv variety (vegetation experiment, sod-podzolic soil) Variants of the experiment Host plant Plant height Content of dry matter in the above-ground mass of plants cm % versus control g/plant % versus control Without inoculation (control) – 30.97 ± 1.17 – 0.84 ± 0.05 – Inoculation with B. lupini 367а lupin 35.15 ± 0.87* 13.5 0.96 ± 0.03* 14.3 Inoculation with B. lupini 30l 34.71 ± 1.14* 12.1 0.99 ± 0.02* 17.9 Inoculation with B. lupini LD4 35.20 ± 0.70* 13.7 1.03 ± 0.22* 22.6 Inoculation with Bradyrhizobium sp. LD8 34.18 ± 0.71* 10.4 0.97 ± 0.02* 15.5 Inoculation with Bradyrhizobium sp. СР1 seradella 32.97 ± 1.11 6.5 0.91 ± 0.04 8.3 Inoculation with B. lupini 631 soybean 34.99 ± 0.78* 12.7 1.02 ± 0.05* 21.4 Inoculation with B. japonicum КВ11 soybean 33.09 ± 0.56 6.8 0.90 ± 0.02 7.1 Inoculation with B. diazoefficiens В22 cowpea 32.76 ± 0.40 5.8 0.93 ± 0.03 10.7 НІР05 2.50 0.10 Note. * — significant increases versus control. Table 4. Influence of soybean and lupin nodule bacteria on symbiotic indicators of white lupin (vegetation experiment, vermiculite) Variants of the experiment Number of nodules, units/plant Weight of nodules, g/plant Nitrogen fixation activity, μ N2/plant per hour Content of dry matter in the above-ground mass of plants, g/plant Gain versus control, % Without inoculation (control) 0 0 0 0.70 ± 0.02 – Inoculation with B. lupini 367а 21.83 ± 0.64 0.13 ± 0.01 6.39 ± 0.47 1.12 ± 0.01 60.0 Inoculation with B. japonicum КВ11 0 0 0 0.81 ± 0.02 15.7 Inoculation with B. japonicum 46 0 0 0 0.98 ± 0.01 40.0 rhizobia strains B. japonicum КВ11 and 46, de- spite the absence of nodules, a significant in- crease of this indicator by 15.7 % and 40.0 %, respectively, was also registered. The analysis of data from two vegetation experiments shows that strains of nodule bacte- ria species B. japonicum and B. diazoefficiens, not specific for lupin, are able to positively ISSN 1997-3004 Сільськогосподарська мікробіологія. 2024. Вип. 39. 29 influence both symbiotic indicators and the growth and development of lupin plants. We be- lieve this may be related to the production of biologically active substances by bradyrhizobia, in particular, phytohormones and exopolysac- charides (EPS) [40]. When interacting with lu- pin, the role of non-specific nodule bacteria can be similar to the role played by growth- promoting bacteria (PGPR) in the activation of symbiotic relationships under simultaneous inoculation with rhizobia [41–43]. There is evi- dence that symbiotic nitrogen fixers are also PGPR microorganisms and can be used as free- living rhizobacteria capable of forming associa- tive relationships with non-leguminous plants [44; 45]. In his work Peňa-Cabrales J. et al. demonstrated that bacteria of the Bradyrhizobi- um genus develop well in the germinating zone of soybean, bean, clover, cowpea, oat, wheat and corn, stimulating root development in a si- milar way to free-living rhizobacteria [46]. Other researchers found a connection between the ability of nodule bacteria B. japonicum to stimulate the growth of non-leguminous plants and their production of indolyl-3-acetic acid (IAC) [47]. It is generally known that rhizobia, as PGP rhizobacteria, are able to produce a wide range of phytohormones: auxins, cytokinins, gibberellins, abscisic acid [48; 49]. Currently, the participation of all groups of phytohormones in the initiation, development and functioning of nitrogen-fixing nodules has been established. Strains of B. japonicum КВ11 and 46 that we have used are also active producers of phy- tohormones of auxin and cytokinin nature, which was registered in previous studies [40]. In addition, it was shown that not only soybean nodule bacteria, but also the products of their metabolism are able to change the ratio of cer- tain strains of rhizobia in nodules and positively influence the formation and functioning of sym- biotic soybean systems. It should be also noted that B. japonicum KB11 produces a significant amount of exopolysaccharides [40], which can exhibit hormone-like effects. It is known from the literature that EPS of rhizobia are able to change the virulence of other homologous strains, enhance the fixation of molecular nitro- gen and increase the efficiency of symbiotic systems [50; 51]. Thus, possessing a complex of features characteristic of PGP microorganisms, the studied nodule bacteria B. japonicum and B. diazoefficiens, which are not specific for lu- pin, could directly or indirectly contribute to the activation of the symbiosis between this plant and representatives of the local population of B. lupini. Further study of the interaction be- tween bradyrhizobia of various species and lu- pin will allow a better understanding of the principles of formation of effective symbiotic systems of this culture. Conclusion. It was established that nodule bacteria isolated from lupin (B. lupini 367a, 30l, LD4 and Bradyrhizobium sp. LD8), seradella (Bradyrhizobium sp. CP1) and soybean (B. lu- pini 631) nodules are able to form an active symbiosis with white and yellow lupin. Micro- symbionts of soybean (B. japonicum КВ11) and cowpea (B. diazoefficiens В22) did not infect these two species of lupin. In the experiment with narrow-leaved lupin, all strains of B. lupini (367a, 30l, LD4, 631) and Bradyrhizobium sp. LD8 provided a reliable in- crease versus the control (without inoculation) of the above-ground mass of plants by 14.3– 22.6 %. 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Вивчити особливості взаємодії трьох видів люпину з бульбочковими бактеріями роду Bradyrhizobium, виділеними з різних бобових рослин: люпину, серадели, сої та вигни. Методи. Мікробіологічні (виділення ризобій із бульбочок та їх культивування), серологічні (визначення серологічної належності штамів), вегетаційного досліду (дослідження хазяйсь- кої специфічності брадіризобій, вивчення формування та функціонування симбіозу люпину з бульбочковими бактеріями), газохроматографічний (визначення активності симбіотичної азотфіксації), математично-статистичні. Результати. За умов вегетаційних дослідів на дерново-підзолистому ґрунті та стерильному вермикуліті досліджено особливості взаємо- дії різних видів люпину зі специфічними та неспецифічними штамами бульбочкових бактерій роду Bradyrhizobium. Встановлено, що ризобії, виділені із бульбочок люпину (B. lupini 367а, 30л, ЛД4 і Bradyrhizobium sp. ЛД8), серадели (Bradyrhizobium sp. СР1) та сої (B. lupini 631), здатні формувати активний симбіоз із рослинами люпину білого та жовтого. Мікросимбі- онти сої (B. japonicum КВ11) та вигни (B. diazoefficiens В22) не інфікували ці два види люпи- ну. У досліді з люпином вузьколистим усі штами B. lupini (367а, 30л, ЛД4, 631) і штам Bradyrhizobium sp. ЛД8 забезпечили достовірне збільшення до контролю надземної маси рос- лин на 14,3–22,6 %. Максимальні значення цього показника отримані у варіантах з інокуля- цією штамами B. lupini ЛД4 і B. lupini 631 (1,03 і 1,02 г/рослину проти 0,84 г/рослину у конт- ролі). За використання неспецифічних для люпину штамів B. japonicum КВ11 і B. diazo- efficiens В22 спостерігали суттєве підвищення нітрогеназної активності бульбочок (в 1,5 і 1,9 раза проти контролю), проте приріст надземної маси рослин був незначним — 7,1 % і 10,7 % відповідно. Висновки. Встановлено, що специфічні для люпину брадіризобії різного походження (B. lupini та Bradyrhizobium sp.) позитивно впливають на формування симбіо- тичного апарату, ріст і розвиток рослин люпину білого, жовтого і вузьколистого. Неспе- цифічні для люпину ризобії сої та вигни (B. japonicum КВ11 і B. diazoefficiens В22) сприяють активізації взаємодії люпину вузьколистого з представниками ґрунтової популяції B. lupini та діють як PGPR-мікроорганізми. Кращими за більшістю симбіотичних показників та ефективністю симбіозу з люпином вузьколистим є штами B. lupini ЛД4 і B. lupini 631. Ключові слова: бульбочкові бактерії, Bradyrhizobium lupini, B. japonicum, B. diazoeffi- ciens, люпин, симбіотична взаємодія. ЦИТОВАНА ЛІТЕРАТУРА 1. Sprent J. I., Ardley J. K., James E. K. Bio- geography of nodulated legumes and their nitrogen- fixing symbionts. New Phytol. 2017. Vol. 215. P. 40–56. https://doi.org/10.1111/nph.14474 2. Drummond C. S., Eastwood R. J., Miot- to S. T. S., Hughes C. E. 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spelling oai:ojs2.smic.in.ua:article-5232026-07-22T10:10:52Z INTERACTION BETWEEN LUPIN PLANTS AND STRAINS OF THE BRADYRHIZOBIUM GENUS ВЗАЄМОДІЯ РОСЛИН ЛЮПИНУ ЗІ ШТАМАМИ БУЛЬБОЧКОВИХ БАКТЕРІЙ РОДУ BRADYRHIZOBIUM Крутило, Д. В. nodule bacteria, Bradyrhizobium lupini, B. japonicum, B. diazoefficiens, lupin, symbiotic interactions бульбочкові бактерії, Bradyrhizobium lupini, B. japonicum, B. diazoefficiens, люпин, симбіотична взаємодія Objective. Study the peculiarities of the interaction between three species of lupin and nodule bacteria of the genus Bradyrhizobium, isolated from various leguminous plants: lupin, seradella, soybean and cowpea. Methods. Microbiological (isolation of rhizobia from nodules and their cultivation), serological (defining serological affiliation of strains), vegetation experiment (study of host specificity of bradyrhizobia, study of the formation and functioning of the symbiosis between lupin and nodule bacteria), gas chromatographic (determination of the activity of symbiotic nitrogen fixation), mathematical and statistical. Results. Under the conditions of vegetation experiments on sod-podzolic soil and sterile vermiculite, the peculiarities of the interaction between different species of lupin and specific and non-specific strains of nodule bacteria of the genus Bradyrhizobium were studied. It was established that rhizobia isolated from lupin nodules (B. lupini 367a, 30l, LD4 and Bradyrhizobium sp. LD8), seradella (Bradyrhizobium sp. СР1) and soybean (B. lupini 631) are able to form an active symbiosis with white and yellow lupin plants. Microsymbionts of soybean (B. japonicum КВ11) and cowpea (B. diazoefficiens В22) did not infect these two species of lupin. In the experiment with narrow-leaved lupin, all strains of B. lupini (367а, 30l, LD4, 631) and LD8 Bradyrhizobium sp. ensured a reliable increase in the above-ground mass of plants by 14.3–22.6 % compared to the control. The maximum values of this indicator were obtained in variants inoculated with B. lupini LD4 and B. lupine 631 strains (1.03 and 1.02 g/plant versus 0.84 g/plant in the control). With the use of non-specific lupin strains B. japonicum КВ11 and B. diazoefficiens В22, a significant increase in the nitrogenase activity of nodules was registered (1.5 and 1.9 times compared to the control), however, the increase in the above-ground mass of plants was insignificant — 7.1 % and 10.7 %, respectively. Conclusion. It has been established that lupin-specific bradyrhizobia of various origins (B. lupini and Bradyrhizobium sp.) have a positive effect on the formation of the symbiotic apparatus, the growth and development of white, yellow and narrowleaved lupin plants. Rhizobia of soybean and cowpea (B. japonicum КВ11 and B. diazoefficiens В22) non-specific for lupin, contribute to the activation of the interaction between narrowleaved lupin and representatives of the soil population of B. lupini and act as PGPR microorganisms. B. lupini LD4 and B. lupini 631 strains are the best in terms of most symbiotic indicators and efficiency of symbiosis with narrow-leaved lupin. Мета. Вивчити особливості взаємодії трьох видів люпину з бульбочковими бактеріями роду Bradyrhizobium, виділеними з різних бобових рослин: люпину, серадели, сої та вигни. Методи. Мікробіологічні (виділення ризобій із бульбочок та їх культивування), серологічні (визначення серологічної належності штамів), вегетаційного досліду (дослідження хазяйської специфічності брадіризобій, вивчення формування та функціонування симбіозу люпину з бульбочковими бактеріями), газохроматографічний (визначення активності симбіотичної азотфіксації), математично-статистичні. Результати. За умов вегетаційних дослідів на дерново-підзолистому ґрунті та стерильному вермикуліті досліджено особливості взаємодії різних видів люпину зі специфічними та неспецифічними штамами бульбочкових бактерій роду Bradyrhizobium. Встановлено, що ризобії, виділені із бульбочок люпину (B. lupini 367а, 30л, ЛД4 і Bradyrhizobium sp. ЛД8), серадели (Bradyrhizobium sp. СР1) та сої (B. lupini 631), здатні формувати активний симбіоз із рослинами люпину білого та жовтого. Мікросимбіонти сої (B. japonicum КВ11) та вигни (B. diazoefficiens В22) не інфікували ці два види люпину. У досліді з люпином вузьколистим усі штами B. lupini (367а, 30л, ЛД4, 631) і штам Bradyrhizobium sp. ЛД8 забезпечили достовірне збільшення до контролю надземної маси рослин на 14,3–22,6 %. Максимальні значення цього показника отримані у варіантах з інокуляцією штамами B. lupini ЛД4 і B. lupini 631 (1,03 і 1,02 г/рослину проти 0,84 г/рослину у контролі). За використання неспецифічних для люпину штамів B. japonicum КВ11 і B. diazoefficiens В22 спостерігали суттєве підвищення нітрогеназної активності бульбочок (в 1,5 і 1,9 раза проти контролю), проте приріст надземної маси рослин був незначним — 7,1 % і 10,7 % відповідно. Висновки. Встановлено, що специфічні для люпину брадіризобії різного походження (B. lupini та Bradyrhizobium sp.) позитивно впливають на формування симбіотичного апарату, ріст і розвиток рослин люпину білого, жовтого і вузьколистого. Неспецифічні для люпину ризобії сої та вигни (B. japonicum КВ11 і B. diazoefficiens В22) сприяють активізації взаємодії люпину вузьколистого з представниками ґрунтової популяції B. lupini та діють як PGPR-мікроорганізми. Кращими за більшістю симбіотичних показників та ефективністю симбіозу з люпином вузьколистим є штами B. lupini ЛД4 і B. lupini 631. Institute of Agrocultural Microbiology and Agro-industrial Manufacture of NAAS of Ukraine 2024-05-17 Article Article Рецензована Стаття application/pdf https://smic.in.ua/index.php/journal/article/view/523 10.35868/1997-3004.39.22-36 Agricultural microbiology; Vol. 39 (2024): Agriciltural microbiology; 22-36 Сільськогосподарська мікробіологія; Том 39 (2024): Сільськогосподарська мікробіологія; 22-36 1997-3004 10.35868/1997-3004.39 en https://smic.in.ua/index.php/journal/article/view/523/592 Авторське право (c) 2024 D. V. Krutylo https://creativecommons.org/licenses/by/4.0
spellingShingle бульбочкові бактерії
Bradyrhizobium lupini
B. japonicum
B. diazoefficiens
люпин
симбіотична взаємодія
Крутило, Д. В.
ВЗАЄМОДІЯ РОСЛИН ЛЮПИНУ ЗІ ШТАМАМИ БУЛЬБОЧКОВИХ БАКТЕРІЙ РОДУ BRADYRHIZOBIUM
title ВЗАЄМОДІЯ РОСЛИН ЛЮПИНУ ЗІ ШТАМАМИ БУЛЬБОЧКОВИХ БАКТЕРІЙ РОДУ BRADYRHIZOBIUM
title_alt INTERACTION BETWEEN LUPIN PLANTS AND STRAINS OF THE BRADYRHIZOBIUM GENUS
title_full ВЗАЄМОДІЯ РОСЛИН ЛЮПИНУ ЗІ ШТАМАМИ БУЛЬБОЧКОВИХ БАКТЕРІЙ РОДУ BRADYRHIZOBIUM
title_fullStr ВЗАЄМОДІЯ РОСЛИН ЛЮПИНУ ЗІ ШТАМАМИ БУЛЬБОЧКОВИХ БАКТЕРІЙ РОДУ BRADYRHIZOBIUM
title_full_unstemmed ВЗАЄМОДІЯ РОСЛИН ЛЮПИНУ ЗІ ШТАМАМИ БУЛЬБОЧКОВИХ БАКТЕРІЙ РОДУ BRADYRHIZOBIUM
title_short ВЗАЄМОДІЯ РОСЛИН ЛЮПИНУ ЗІ ШТАМАМИ БУЛЬБОЧКОВИХ БАКТЕРІЙ РОДУ BRADYRHIZOBIUM
title_sort взаємодія рослин люпину зі штамами бульбочкових бактерій роду bradyrhizobium
topic бульбочкові бактерії
Bradyrhizobium lupini
B. japonicum
B. diazoefficiens
люпин
симбіотична взаємодія
topic_facet nodule bacteria
Bradyrhizobium lupini
B. japonicum
B. diazoefficiens
lupin
symbiotic interactions
бульбочкові бактерії
Bradyrhizobium lupini
B. japonicum
B. diazoefficiens
люпин
симбіотична взаємодія
url https://smic.in.ua/index.php/journal/article/view/523
work_keys_str_mv AT krutilodv interactionbetweenlupinplantsandstrainsofthebradyrhizobiumgenus
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