Transcription Factor WRKY70 Displays Important but No Indispensable Roles in Jasmonate and Salicylic Acid Signaling  

作　　者：Chun-Mei Ren Qi Zhu Bi-Da Gao Shao-Ying Ke Wan-Cong Yu Dao-Xin Xie Wen Peng 

机构地区：[1]College of Bioscience and Biotechnology, Hunan Agncultural University, Changsha 410128, China [2]Crop Gene Engineering Key Laboratory of Hunan Province, Hunan Agncultural University, Changsha 410128, China [3]College of Horticulture and Gardening, Hunan Agncultural University, Changsha 410128, China [4]College of Bio-Safety Science and Technology, Hunan Agricultural University, Changsha 410128, China [5]Department of Biological Sciences, Tangshan Normal College, Tangshan 063000, China [6]Ministry of Education Key Laboratory of Bioinformatics, Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing 100084, China

出　　处：《Journal of Integrative Plant Biology》2008年第5期630-637,共8页植物学报（英文版）

基　　金：the National Natural Science Foundation of China (30630044,30671121,30770195 and 30771147).

摘　　要：The transcription factor WRKY70 was previously reported to be a common component in salicylic acid （SA） and jasmonate （JA） mediated signal pathways in Arabidopsis. Here, we present that the inactivation of the WRKY70 gene in wrky70-1 mutant does not alter the responses of both JA and SA, and that wrky70 mutation is unable to restore the coil mutant in JA responses. However, overexpression of WRKY70 reduces JA responses such as expression of JA-induced genes and JA-inhibitory root growth, and activates expression of SA-inducible PR1. These data indicate that the WRKY70 is important but not indispensable for JA and SA signaling, and that other regulators may display the redundant role with WRKY70 in modulation of JA and SA responses in Arabidopsis. Furthermore, we showed that JA inhibits expression of WRKY70 and PR1 by both COi1-dependent and COi1-independent pathways.The transcription factor WRKY70 was previously reported to be a common component in salicylic acid （SA） and jasmonate （JA） mediated signal pathways in Arabidopsis. Here, we present that the inactivation of the WRKY70 gene in wrky70-1 mutant does not alter the responses of both JA and SA, and that wrky70 mutation is unable to restore the coil mutant in JA responses. However, overexpression of WRKY70 reduces JA responses such as expression of JA-induced genes and JA-inhibitory root growth, and activates expression of SA-inducible PR1. These data indicate that the WRKY70 is important but not indispensable for JA and SA signaling, and that other regulators may display the redundant role with WRKY70 in modulation of JA and SA responses in Arabidopsis. Furthermore, we showed that JA inhibits expression of WRKY70 and PR1 by both COi1-dependent and COi1-independent pathways.

关 键 词：ARABIDOPSIS COl 1 JASMONATE salicylic acid SIGNALING WRKY70. 

分 类 号：Q946[生物学—植物学]