Mandon Karine, Nazaret Fanny, Farajzadeh Davoud, Alloing Geneviève, Frendo Pierre
Université Côte d'Azur, INRAE, CNRS, ISA, 06903 Sophia Antipolis, France.
Department of Biology, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz 5375171379, Iran.
Antioxidants (Basel). 2021 May 30;10(6):880. doi: 10.3390/antiox10060880.
Plants interact with a large number of microorganisms that greatly influence their growth and health. Among the beneficial microorganisms, rhizosphere bacteria known as Plant Growth Promoting Bacteria increase plant fitness by producing compounds such as phytohormones or by carrying out symbioses that enhance nutrient acquisition. Nitrogen-fixing bacteria, either as endophytes or as endosymbionts, specifically improve the growth and development of plants by supplying them with nitrogen, a key macro-element. Survival and proliferation of these bacteria require their adaptation to the rhizosphere and host plant, which are particular ecological environments. This adaptation highly depends on bacteria response to the Reactive Oxygen Species (ROS), associated to abiotic stresses or produced by host plants, which determine the outcome of the plant-bacteria interaction. This paper reviews the different antioxidant defense mechanisms identified in diazotrophic bacteria, focusing on their involvement in coping with the changing conditions encountered during interaction with plant partners.
植物与大量微生物相互作用，这些微生物对植物的生长和健康有很大影响。在有益微生物中，被称为植物促生细菌的根际细菌通过产生植物激素等化合物或通过进行增强养分获取的共生作用来提高植物适应性。固氮细菌，无论是作为内生菌还是内共生体，都通过为植物提供氮（一种关键的大量元素）来特别促进植物的生长和发育。这些细菌的存活和增殖需要它们适应根际和宿主植物，而根际和宿主植物是特殊的生态环境。这种适应高度依赖于细菌对活性氧（ROS）的反应，活性氧与非生物胁迫相关或由宿主植物产生，它决定了植物与细菌相互作用的结果。本文综述了在固氮细菌中发现的不同抗氧化防御机制，重点关注它们在应对与植物伙伴相互作用过程中遇到的不断变化的条件时所起的作用。
