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首页> 外文期刊>Annual Review of Phytopathology >Genomic Insights into the Contribution of Phytopathogenic Bacterial Plasmids to the Evolutionary History of Their Hosts
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Genomic Insights into the Contribution of Phytopathogenic Bacterial Plasmids to the Evolutionary History of Their Hosts

机译：基因组见解植物致病性细菌质粒对其宿主的进化史的贡献。

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摘要

Plasmids are common residents of phytopathogenic bacteria and contribute significantly to host evolution in a multi-faceted manner. Plasmids tend to encode determinants of virulence and ecological fitness that can enhance adaptation to a specific niche or can influence niche expansion. Many of these determinants appear to have been acquired from other bacteria via horizontal transfer, illustrating an important function of plasmids in the acquisition of sequences that enable rapid evolution. These genes can ultimately be delivered to the host chromosome through plasmid integration events, thus stabilizing important acquired determinants within the genome. Most plasmids characterized in phytopathogenic bacteria are self-transmissible and possess suites of genes encoding type TV secretion systems. In addition, the phytopathogenic bacterial plasmid "mobilome" includes insertion sequence and other transpos-able elements that contribute to the movement of sequences within and between genomes. Possessionof mosaic and ever-changing plasmids allows phytopathogenic bacteria to maintain a dynamic, flexible genome and possible advantage in host-pathogen and other environmental interactions that belies the concept of plasmids as apparently selfish genetic elements.
机译：质粒是植物致病细菌的常见居民，并以多方面的方式为宿主进化做出了重要贡献。质粒趋向于编码能增强对特定生态位的适应性或影响生态位扩展的毒力和生态适应性的决定因素。这些决定因素中有许多似乎是通过水平转移从其他细菌中获得的，说明了质粒在获得能够快速进化的序列中的重要作用。这些基因最终可以通过质粒整合事件传递到宿主染色体，从而稳定基因组内重要的获得性决定簇。在植物病原细菌中表征的大多数质粒是可自我传播的，并拥有一系列编码TV分泌系统的基因。另外，植物病原性细菌质粒“运动组”包括插入序列和其他可转座元件，其有助于基因组内和基因组之间的序列移动。拥有马赛克和不断变化的质粒可使致病细菌保持动态，灵活的基因组，并在宿主-病原体和其他环境相互作用中可能具有优势，这使质粒的概念显然是自私的遗传元素。

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