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EDS1 in Plant Innate Immunity
Zhang Mengshu, Niu Hongwei, Hou Chunyan*, Wang Dongmei*
Key Laboratory of Hebei Province for Molecular Plant-Microbe Interaction,Agricultural University of Hebei, Baoding 071001, China
Abstract: EDS1 (enhanced disease susceptibility 1) is an important defense gene which codes a signal protein. The protein locates in the key node of plant innate immune signal network. PAD4 (phytoalexin deficiency 4) and SAG101 (senescence-associated gene 101) are signaling partners of EDS1. EDS1 plays important roles in ETI (effectors-triggered immunity) which is mainly mediated by TIR-NB-LRR (toll-interleukin-1 receptor-nucleotide binding-leucine-rich repeat) resistance proteins and PTI (PAMP-triggered immunity) which is not mediated by any R proteins (resistance proteins). EDS1 primarily regulates intracellular ROS (reactive oxygen species) burst and SA (salicylic) accumulation as well as suppresses JA/ET (jasmonic acid/ethylene) signal pathway. This paper reviews the structure of EDS1 protein as well as its important roles in defense signal pathways.
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