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The extreme plant-growth-promoting properties of Pantoea phytobeneficialis MSR2 revealed by functional and genomic analysis.
Environmental Microbiology ( IF 5.1 ) Pub Date : 2020-02-23 , DOI: 10.1111/1462-2920.14946
Francisco X Nascimento 1, 2 , Anabel G Hernandez 2 , Bernard R Glick 3 , Márcio J Rossi 2
Affiliation  

Numerous Pantoea strains are important because of the benefit they provide in the facilitation of plant growth. However, Pantoea have a high level of genotypic diversity and not much is understood regarding their ability to function in a plant beneficial manner. In the work reported here, the plant growth promotion activities and the genomic properties of the unusual Pantoea phytobeneficialis MSR2 are elaborated, emphasizing the genetic mechanisms involved in plant colonization and growth promotion. Detailed analysis revealed that strain MSR2 belongs to a rare group of Pantoea strains possessing an astonishing number of plant growth promotion genes, including those involved in nitrogen fixation, phosphate solubilization, 1-aminocyclopropane-1-carboxylic acid deaminase activity, indoleacetic acid and cytokinin biosynthesis, and jasmonic acid metabolism. Moreover, the genome of this bacterium also contains genes involved in the metabolism of lignin and other plant cell wall compounds, quorum-sensing mechanisms, metabolism of plant root exudates, bacterial attachment to plant surfaces and resistance to plant defences. Importantly, the analysis revealed that most of these genes are present on accessory plasmids that are found within a small subset of Pantoea genomes, reinforcing the idea that Pantoea evolution is largely mediated by plasmids, providing new insights into the evolution of beneficial plant-associated Pantoea.

中文翻译:

通过功能和基因组分析揭示了Pantoea phytobeneficialis MSR2的极端植物生长特性。

许多泛菌菌株很重要,因为它们在促进植物生长方面提供了好处。然而,泛菌具有高水平的基因型多样性,关于它们以植物有益的方式发挥功能的能力知之甚少。在这里报道的工作中,详细阐述了植物生长促进活性和异常植物泛生物素MSR2的基因组特性,强调了植物定植和生长促进的遗传机制。详细的分析表明,菌株MSR2属于罕见的泛菌菌株,具有数量惊人的植物生长促进基因,包括参与固氮,磷酸盐增溶,1-氨基环丙烷-1-羧酸脱氨酶活性,吲哚乙酸和细胞分裂素生物合成的基因。 ,和茉莉酸代谢。此外,该细菌的基因组还包含与木质素和其他植物细胞壁化合物的代谢,群体感应机制,植物根系分泌物的代谢,细菌对植物表面的附着以及对植物防御的抵抗力有关的基因。重要的是,该分析表明,大多数这些基因都存在于Pantoea基因组的一小部分中发现的辅助质粒上,从而增强了Pantoea进化很大程度上由质粒介导的观点,从而为有益植物相关Pantoea的进化提供了新见解。 。细菌附着在植物表面并具有抵抗植物防御的能力。重要的是,分析表明,这些基因中的大多数都存在于Pantoea基因组的一小部分中发现的辅助质粒上,从而增强了Pantoea进化很大程度上由质粒介导的观点,从而为有益的植物相关Pantoea的进化提供了新见解。 。细菌附着在植物表面并具有抵抗植物防御的能力。重要的是,该分析表明,大多数这些基因都存在于Pantoea基因组的一小部分中发现的辅助质粒上,从而增强了Pantoea进化很大程度上由质粒介导的观点,从而为有益植物相关Pantoea的进化提供了新见解。 。
更新日期:2020-04-01
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