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Reactive Oxygen Species during Plant-microorganism Early Interactions

Journal of Integrative Plant Biology 2010年第2期52卷 195-204页

作者： Amrit K.Nanda Emilie Andrio Daniel Marino Nicolas Pauly christophe dunand SCSV-UMR5546 CNRS/UPS 24 Chemin de BorderougeBP 42617 Auzeville31326 Castanet-TolosanFrance Interactions Biotiques et Santé Végétale UMR INRA 1301-Université de Nice-Sophia Antipolis-CNRS 6243400 Route des ChappesBP167F-06903 Sophia Antipolis CedexFrance

Reactive Oxygen Species （ROS） are continuously produced as a result of aerobic metabolism or in response to biotic and abiotic stresses. ROS are not only toxic by-products of aerobic metabolism, but are also signalling molecules involved in several developmental processes in all organisms. Previous studies have clearly shown that an oxidative burst often takes place at the site of attempted invasion during the early stages of most plant-pathogen interac- tions. Moreover, a second ROS production can be observed during certain types of plant-pathogen interactions, which triggers hyper- sensitive cell death （HR）. This second ROS wave seems absent during symbiotic interactions. This difference between these two responses is thought to play an important signalling role leading to the establishment of plant defense. In order to cope with the deleterious effects of ROS, plants are fitted with a large panel of enzymatic and non-enzymatic antioxidant mechanisms. Thus,increasing numbers of publications report the characterisation of ROS producing and scavenging systems from plants and from microorganisms during interactions. In this review, we present the current knowledge on the ROS signals and their role during plant-microorganism interactions.

关键词： ROS Reactive Oxygen Species during Plant-microorganism Early Interactions

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CsPrx25,a class III peroxidase in Citrus sinensis,confers resistance to citrus bacterial canker through the maintenance of ROS homeostasis and cell wall lignification

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Horticulture Research 2020年第1期7卷 130-140页

作者： Qiang Li Xiujuan Qin Jingjing Qi Wanfu Dou christophe dunand Shanchun Chen Yongrui He Citrus Research Institute Southwest University/Chinese Academy of Agricultural SciencesChongqing 400712China Laboratoire de Recherche en Sciences Végétales Universitéde ToulouseCNRSUPSAuzeville-Tolosane 31320France Key Laboratory of Plant Hormones and Development Regulation of Chongqing School of Life SciencesChongqing University401331 ChongqingChina

Citrus bacterial canker(CBC)results from Xanthomonas citri ***(Xcc)infection and poses a grave threat to citrus *** III peroxidases(CIII Prxs)are key proteins to the environmental adaptation of citrus plants to a range of exogenous pathogens,but the role of CIII Prxs during plant resistance to CBC is poorly ***,we explored the role of CsPrx25 and its contribution to plant defenses in molecular *** on the expression analysis,CsPrx25 was identified as an apoplast-localized protein that is differentially regulated by Xcc infection,salicylic acid,and methyl jasmone acid in the CBC-susceptible variety Wanjincheng(***)and the CBC-resistant variety Calamondin(***).Transgenic Wanjincheng plants overexpressing CsPrx25 were generated,and these transgenic plants exhibited significantly increased CBC resistance compared with the WT *** addition,the CsPrx25-overexpressing plants displayed altered reactive oxygen species(ROS)homeostasis accompanied by enhanced H_(2)O_(2) levels,which led to stronger hypersensitivity responses during Xcc ***,the overexpression of CsPrx25 enhanced lignification as an apoplastic barrier for Xcc *** together,the results highlight how CsPrx25-mediated ROS homeostasis reconstruction and cell wall lignification can enhance the resistance of sweet orange to CBC.

关键词： sinensis citrus Citrus

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