CaWRKY40, a WRKY protein of pepper, plays an important role in the regulation of tolerance to heat stress and resistance to Ralstonia solanacearum infection (pages 757–774)
FENG-FENG DANG, YU-NA WANG, LU YU, THOMAS EULGEM, YAN LAI, ZHI-QIN LIU, XU WANG, AI-LIAN QIU, TING-XIU ZHANG, JING LIN, YAN-SHENG CHEN, DE-YI GUAN, HAN-YANG CAI, SHAO-LIANG MOU and SHUI-LIN HE
Version of Record online: 16 OCT 2012 | DOI: 10.1111/pce.12011
Using reverse genetic approaches we show that CaWRKY40 promotes immunity against the bacterial pathogen Ralstonia solanacearum and tolerance against heat stress in pepper. Our findings are novel, because biological roles of WRKY transcription factors from Solanaceae have so far only been peripherally described. In addition, we are providing evidence for a WRKY-dependent regulatory mechanism that simultaneously promotes resistance against pathogens and heat-stress. This new WRKY function is unique and likely constitutes an important adaptation of pepper to conditions of high temperatures associated with enhanced pathogen pressure.