| Title | Genomic insights into the plant-associated lifestyle of Kosakonia radicincitans MUSA4, a diazotrophic plant-growth-promoting bacterium |
|---|---|
| ID_Doc | 10996 |
| Authors | Quintas-Nunes, F; Rossi, MJ; Nascimento, FX |
| Title | Genomic insights into the plant-associated lifestyle of Kosakonia radicincitans MUSA4, a diazotrophic plant-growth-promoting bacterium |
| Year | 2022 |
| Published | Systematic And Applied Microbiology, 45, 2 |
| Abstract | The process of nitrogen (N) fixation by plant-associated bacteria plays an indispensable role in the development of novel agricultural solutions worldwide. In this sense, it is of extreme importance to identify and understand the properties of efficient plant-growth-promoting bacteria (PGPB) that are able to fix N. In this study, the characterization and detailed genomic analysis of the diazotrophic bacterium Kosakonia radicincitans MUSA4, isolated from the internal leaf tissues of a banana tree in Brazil, were undertaken. K. radicincitans MUSA4 presented several plant-growth-promoting traits, including indoleacetic acid, siderophore, acetoin and polyamine biosynthesis, phosphate solubilization, and nitrogen fixation. The strain was able to increase cucumber plant growth significantly, demonstrating its potential in beneficial interactions with plant hosts. Detailed genomic analysis of strain MUSA4 revealed the abundant presence of genes involved in plant colonization, stress resistance and plant-growth-promoting abilities. Moreover, the genome harbored the nif and anf gene clusters, encoding the Fe-Mo nitrogenase and Fe-Fe nitrogenase systems, respectively. Comparative genomic analysis also showed that strain MUSA4 possessed several strain-specific genes, which could be related to its evolutionary history in Brazilian mangrove environments. The results obtained in the present study revealed the plant beneficial role and biotechnological potential of K. radicincitans MUSA4, and provided new insights into plant colonization and plant growth promoting mechanisms employed by diazotrophic Kosakonia. (c) 2022 Elsevier GmbH. All rights reserved. |
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