Growth-promoting effects of Bradyrhizobium soybean symbionts in black oats, white oats, and ryegrass

Castilho, Carolina Leal de; Volpiano, Camila Gazolla; Ambrosini, Adriana; Zulpo, Lucas; Passaglia, Luciane Maria Pereira; Beneduzi, Anelise; Sá, Enílson Luiz Saccol de

doi:10.1007/s42770-021-00523-1

Cited by 3 publications

(1 citation statement)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[6]. In addition to those known to have a symbiotic lifestyle, some non-symbiotic Bradyrhizobium ecotypes are found living freely in soils [8], while others have the ability to promote plant growth when in endophytic associations [9,10]. The genus also has strains which are highly effective nodulators of the non-legume Parasponia [11], and some strains have both the ability to photosynthesize and to nodulate legumes without the Nod factor mechanism [12,13].…”

Section: Introductionmentioning

confidence: 99%

Bradyrhizobium cenepequi sp. nov., Bradyrhizobium semiaridum sp. nov., Bradyrhizobium hereditatis sp. nov. and Bradyrhizobium australafricanum sp. nov., symbionts of different leguminous plants of Western Australia and South Africa and definition of three novel symbiovars

Klepa

Helene

Hara

et al. 2022

International Journal of Systematic and Evolutionary Microbiology

View full text Add to dashboard Cite

Bradyrhizobium is a heterogeneous bacterial genus capable of establishing symbiotic associations with a broad range of legume hosts, including species of economic and environmental importance. This study was focused on the taxonomic and symbiovar definition of four strains – CNPSo 4026T, WSM 1704T, WSM 1738T and WSM 4400T – previously isolated from nodules of legumes in Western Australia and South Africa. The 16S rRNA gene phylogenetic tree allocated the strains to the Bradyrhizobium elkanii supergroup. The multilocus sequence analysis (MLSA) with partial sequences of six housekeeping genes – atpD, dnaK, glnII, gyrB, recA and rpoB – did not cluster the strains under study as conspecific to any described Bradyrhizobium species. Average nucleotide identity and digital DNA–DNA hybridization values were calculated for the four strains of this study and the closest species according to the MLSA phylogeny with the highest values being 95.46 and 62.20 %, respectively; therefore, both being lower than the species delineation cut-off values. The nodC and nifH phylogenies included strains WSM 1738T and WSM 4400T in the symbiovars retamae and vignae respectively, and also allowed the definition of three new symbiovars, sv. cenepequi, sv. glycinis, and sv. cajani. Analysis of morphophysiological characterization reinforced the identification of four novel proposed Bradyrhizobium species that are accordingly named as follows: Bradyrhizobium cenepequi sp. nov. (CNPSo 4026T=WSM 4798T=LMG 31653T), isolated from Vigna unguiculata; Bradyrhizobium semiaridum sp. nov. (WSM 1704T=CNPSo 4028T=LMG 31654T), isolated from Tephrosia gardneri; Bradyrhizobium hereditatis sp. nov. (WSM 1738T=CNPSo 4025T=LMG 31652T), isolated from Indigofera sp.; and Bradyrhizobium australafricanum sp. nov. (WSM 4400T=CNPSo 4015T=LMG 31648T) isolated from Glycine sp.

show abstract