Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Phytopathologia Mediterranea 3-20 R and avr genes hypersensitive response defense reactions control 2015 fdi:010064151 ENG Phytopathologia Mediterranea 0031-9465 ISI:000353407100001 1 https://www.documentation.ird.fr/hor/fdi:010064151 https://www.documentation.ird.fr/intranet/publi/2015/05/010064151.pdf 54 Horizon (IRD) Bacterial blight of cotton (Gossypium ssp.), caused by Xanthomonas citri pathovar malvacearum, is a severe disease occurring in all cotton-growing areas. The interactions between host plants and the bacteria are based on the gene-for-gene concept, representing a complex resistance gene/avr gene system. In light of the recent data, this review focuses on the understanding of these interactions with emphasis on (1) the genetic basis for plant resistance and bacterial virulence, (2) physiological mechanisms involved in the hypersensitive response to the pathogen, including hormonal signaling, the oxylipin pathway, synthesis of antimicrobial molecules and alteration of host cell structures, and (3) control of the disease. 076 UR186 / UR232 Syrie