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Article

Increasing the Legume–Rhizobia Symbiotic Efficiency Due to the Synergy between Commercial Strains and Strains Isolated from Relict Symbiotic Systems

1
All-Russia Research Institute for Agricultural Microbiology (ARRIAM), Sh. Podbelskogo 3, 196608 Saint Petersburg, Russia
2
Siberian Institute of Plant Physiology and Biochemistry (SIPPB), 664033 Irkutsk, Russia
3
Department of Genetics and Biotechnology, Saint Petersburg State University, Universitetskaya Emb. 7/9, 199034 Saint Petersburg, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Julien Levy
Agronomy 2021, 11(7), 1398; https://doi.org/10.3390/agronomy11071398
Received: 28 April 2021 / Revised: 28 June 2021 / Accepted: 8 July 2021 / Published: 12 July 2021
(This article belongs to the Special Issue Rhizobial Symbiosis in Crop Legumes: Molecular and Cellular Aspects)
The phenomenon of rhizobial synergy was investigated to increase the efficiency of nitrogen-fixing symbiosis of alfalfa (Medicago varia Martyn), common vetch (Vicia sativa L.) or red clover (Trifolium pratense L.). These plants were co-inoculated with the respective commercial strains Sinorhizobium meliloti RCAM1750, Rhizobium leguminosarum RCAM0626 or R. leguminosarum RCAM1365 and with the strains Mesorhizobium japonicum Opo-235, M. japonicum Opo-242, Bradyrhizobium sp. Opo-243 or M. kowhaii Ach-343 isolated from the relict legumes Oxytropis popoviana Peschkova and Astragalus chorinensis Bunge. The isolates mentioned above had additional symbiotic genes (fix, nif, nodnoe and nol) as well as the genes promoting plant growth and symbiosis formation (acdRS, genes associated with the biosynthesis of gibberellins and auxins, genes of T3SS, T4SS and T6SS secretion systems) compared to the commercial strains. Nodulation assays showed that in some variants of co-inoculation the symbiotic parameters of plants such as nodule number, plant biomass or acetylene reduction activity were increased. We assume that the study of microbial synergy using rhizobia of relict legumes will make it possible to carry out targeted selection of co-microsymbionts to increase the efficiency of agricultural legume–rhizobia systems. View Full-Text
Keywords: plant-microbe interaction; crop legumes; relict symbiotic systems; rhizobial synergy; efficiency of symbiosis plant-microbe interaction; crop legumes; relict symbiotic systems; rhizobial synergy; efficiency of symbiosis
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MDPI and ACS Style

Safronova, V.; Sazanova, A.; Kuznetsova, I.; Belimov, A.; Guro, P.; Karlov, D.; Yuzikhin, O.; Chirak, E.; Verkhozina, A.; Afonin, A.; Andronov, E.; Tikhonovich, I. Increasing the Legume–Rhizobia Symbiotic Efficiency Due to the Synergy between Commercial Strains and Strains Isolated from Relict Symbiotic Systems. Agronomy 2021, 11, 1398. https://doi.org/10.3390/agronomy11071398

AMA Style

Safronova V, Sazanova A, Kuznetsova I, Belimov A, Guro P, Karlov D, Yuzikhin O, Chirak E, Verkhozina A, Afonin A, Andronov E, Tikhonovich I. Increasing the Legume–Rhizobia Symbiotic Efficiency Due to the Synergy between Commercial Strains and Strains Isolated from Relict Symbiotic Systems. Agronomy. 2021; 11(7):1398. https://doi.org/10.3390/agronomy11071398

Chicago/Turabian Style

Safronova, Vera, Anna Sazanova, Irina Kuznetsova, Andrey Belimov, Polina Guro, Denis Karlov, Oleg Yuzikhin, Elizaveta Chirak, Alla Verkhozina, Alexey Afonin, Evgeny Andronov, and Igor Tikhonovich. 2021. "Increasing the Legume–Rhizobia Symbiotic Efficiency Due to the Synergy between Commercial Strains and Strains Isolated from Relict Symbiotic Systems" Agronomy 11, no. 7: 1398. https://doi.org/10.3390/agronomy11071398

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