@article{fdi:010076226, title = {{M}utualistic co-evolution of {T}3{SS}s during the establishment of symbiotic relationships between {V}igna radiata and {B}radyrhizobia}, author = {{P}iromyou, {P}. and {S}ongwattana, {P}. and {T}eamtisong, {K}. and {T}ittabutr, {P}. and {B}oonkerd, {N}. and {T}antasawat, {P}. {A}. and {G}iraud, {E}ric and {G}ottfert, {M}. and {T}eaumroong, {N}.}, editor = {}, language = {{ENG}}, abstract = {{T}his study supports the idea that the evolution of type {III} secretion system ({T}3{SS}) is one of the factors that controls {V}igna radiata-bradyrhizobia symbiosis. {B}ased on phylogenetic tree data and gene arrangements, it seems that the {T}3{SS}s of the {T}hai bradyrhizobial strains {SUTN}9-2, {DOA}1, and {DOA}9 and the {S}enegalese strain {ORS}3257 may share the same origin. {T}herefore, strains {SUTN}9-2, {DOA}1, {DOA}9, and {ORS}3257 may have evolved their {T}3{SS}s independently from other bradyrhizobia, depending on biological and/or geological events. {F}or functional analyses, the rhc{J} genes of {ORS}3257, {SUTN}9-2, {DOA}9, and {USDA}110 were disrupted. {T}hese mutations had cultivar-specific effects on nodulation properties. {T}he {T}3{SS}s of {ORS}3257 and {DOA}9 showed negative effects on {V}. radiata nodulation, while the {T}3{SS} of {SUTN}9-2 showed no effect on {V}. radiata symbiosis. {I}n the roots of {V}. radiata {CN}72, the expression levels of the {PR}1 gene after inoculation with {ORS}3257 and {DOA}9 were significantly higher than those after inoculation with {ORS}3257 omega {T}3{SS}, {DOA}9 omega {T}3{SS}, and {SUTN}9-2. {T}he {T}3{E}s from {ORS}3257 and {DOA}9 could trigger {PR}1 expression, which ultimately leads to abort nodulation. {I}n contrast, the {T}3{E} from {SUTN}9-2 reduced {PR}1 expression. {I}t seems that the mutualistic relationship between {SUTN}9-2 and {V}. radiata may have led to the selection of the most well-adapted combination of {T}3{SS} and symbiotic bradyrhizobial genotype.}, keywords = {bradyrhizobial {T}3{SS} ; mutualistic co-evolution ; {V}. radiata-bradyrhizobia ; symbiosis}, booktitle = {}, journal = {{M}icrobiologyopen}, volume = {8}, numero = {7}, pages = {e781 [16 p.]}, ISSN = {2045-8827}, year = {2019}, DOI = {10.1002/mbo3.781}, URL = {https://www.documentation.ird.fr/hor/fdi:010076226}, }