Phylogenetic distribution and evolutionary dynamics of nod and T3SS genes in the genus Bradyrhizobium.

ABSTRACT: Bradyrhizobium are abundant soil bacteria and the major symbiont of legumes. The recent availability of Bradyrhizobium genome sequences provides a large source of information for analysis of symbiotic traits. In this study, we investigated the evolutionary dynamics of the nodulation genes (nod) and their relationship with the genes encoding type III secretion systems (T3SS) and their effectors among bradyrhizobia. Based on the comparative analysis of 146 Bradyrhizobium genome sequences, we identified six different types of T3SS gene clusters. The two predominant cluster types are designated RhcIa and RhcIb and both belong to the RhcI-T3SS family previously described in other rhizobia. They are found in 92/146 strains, most of them also containing nod gene

SUBMITTER: Teulet A 

PROVIDER: S-EPMC7643967 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature