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- W4309221542 abstract "Abstract Drought is the most important factor limiting the activity of rhizobia during N-fixation and plant growth. In the present study, we isolated Bradyrhizobium spp. from root nodules of higher trehalose accumulating soybean genotypes and examined for moisture stress tolerance on a gradient of polyethylene glycol (PEG 6000) amended in yeast extract mannitol (YEM) broth. In addition, the bradyrhizobial strains were also evaluated for symbiotic effectiveness on soybean. Based on 16S rDNA gene sequences, four bradyrhizobial species were recovered from high trehalose accumulating genotypes, i.e., two Bradyrhizobium liaoningense strains (accession number KX230053, KX230054) from EC 538828, PK-472 respectively, one Bradyrhizobium daqingense (accession number KX230052) from PK-472, and one Bradyrhizobium kavangense (accession number MN197775) from Valder genotype having low trehalose. These strains, along with two native strains viz., ( Bradyrhizobium japonicum (JF 792425), Bradyrhizobium liaoningense (JF 792426), and one commercial rhizobium, were studied for nodulation, leghaemoglobin, and N-fixation abilities on soybean under sterilized sand microcosms conditions in a completely randomized design. Among all the strains, D-4A ( B. daqingense ) followed by D-4B ( B. liaoningense ) were found to have significantly higher nodulation traits, acetylene reduction assay (ARA), when compared to other strains and commercial rhizobia. The bradyrhizobia isolated showed plant-growth promotion traits such as Indole acetic acid (IAA) production, exopolysaccharide production (EPS), phosphate solubilizing potential, siderophore, and proline. The novel species B. daqingense was reported for the first time from Indian soil and observed to be a potential candidate strain and should be evaluated for conferring drought tolerance in soybean under simulated stress conditions." @default.
- W4309221542 created "2022-11-24" @default.
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- W4309221542 date "2022-11-15" @default.
- W4309221542 modified "2023-10-18" @default.
- W4309221542 title "Exploring potential soybean bradyrhizobia from high trehalose-accumulating soybean genotypes for improved symbiotic effectiveness in soybean" @default.
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- W4309221542 doi "https://doi.org/10.21203/rs.3.rs-2263051/v1" @default.
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