Data_Sheet_1.docx

Ethylene and its precursor 1-aminocyclopropane-1-carboxylate (ACC) actively participate in plant developmental, defense and symbiotic programs. In this sense, ethylene and ACC play a central role in the regulation of bacterial colonization (rhizospheric, endophytic, and phyllospheric) by the modulation of plant immune responses and symbiotic programs, as well as by modulating several developmental processes, such as root elongation. Plant-associated bacterial communities impact plant growth and development, both negatively (pathogens) and positively (plant-growth promoting and symbiotic bacteria). Some members of the plant-associated bacterial community possess the ability to modulate plant ACC and ethylene levels and, subsequently, modify plant defense responses, symbiotic programs and overall plant development. In this work, we review and discuss the role of ethylene and ACC in several aspects of plant-bacterial interactions. Understanding the impact of ethylene and ACC in both the plant host and its associated bacterial community is key to the development of new strategies aimed at increased plant growth and protection.

乙烯及其前体1-氨基环丙烷-1-羧酸（1-aminocyclopropane-1-carboxylate，ACC）积极参与植物的生长发育、防御应答与共生调控过程。基于此，乙烯与ACC可通过调控植物免疫反应、共生程序以及根系伸长等多种发育进程，在细菌定殖（根际、内生及叶际）的调控中发挥核心作用。植物相关细菌群落对植物生长发育兼具双向影响：负面效应体现为病原菌侵染，正面效应则涵盖植物促生菌与共生细菌的作用。部分植物相关细菌群落成员能够调控植物体内ACC与乙烯的水平，进而改变植物的防御应答、共生程序及整体生长发育状态。本研究综述并探讨了乙烯与ACC在植物-细菌互作多个维度中的功能。解析乙烯与ACC对植物宿主及其相关细菌群落的影响，是开发旨在促进植物生长与增强植物防护的新型策略的关键所在。