Role of QseG membrane protein in beneficial enterobacterial interactions with plants and Mesorhizobia

Journal of Plant Interactions

Pedro F. Mateos¹  Ana Paço²  Denise Pereira Torres²  Clarisse Brígido²  Esther Menéndez² 

[1] Departamento de Microbiología y Genética, Centro Hispano Luso de Investigaciones Agrarias, Unidad Asociada CSIC-USAL, Universidad de Salamanca, Salamanca, Spai;MED – Mediterranean Institute for Agriculture, Environment and Development, Institute for Advanced Studies and Research, Universidade de Évora, Évora, Portuga;

关键词: Plant defence response;    bacterial infection ability;    plant growth-promoting bacteria;    Cicer arietinum;    symbiosis;    bacterial endophytes;   

DOI  :  10.1080/17429145.2021.2000050

来源: Taylor & Francis

【 摘 要 】

Homologs of qseG gene (coding for the membrane protein QseG), along with the qseEF genes, are present in many Enterobacteriaceae; however, its role in non-pathogenic strains is still unknown. To fill this knowledge gap, we investigated the role of QseG protein of a plant-associated enterobacterium in the interactions with its legume host and in the benefits induced by this enterobacterium in the Mesorhizobium–chickpea symbiosis. Here, we showed that QseG of Kosakonia sp. MH5 is involved in the following processes: (i) the evasion of the plant immune system and (ii) the efficient colonization of chickpea root cells. Furthermore, these features are essential for the beneficial effects of this strain on the Mesorhizobium–chickpea symbiosis. This study demonstrates that the role of QseG is transversal to pathogenic and non-pathogenic enterobacteria and is a step forward to better understanding the molecular bases of plant–bacteria interactions established between legume and beneficial endophytic enterobacteria.

【 授权许可】

CC BY