Arabidopsis VQ motif-containing proteins VQ12 and VQ29 negatively modulate basal defense against Botrytis cinerea.
Arabidopsis VQ motif-containing proteins VQ12 and VQ29 negatively modulate basal defense against Botrytis cinerea.
复制标题
拟南芥中含有 VQ 基序的蛋白 VQ12 和 VQ29 负向调节针对灰葡萄孢的基础防御
DOI:
10.1038/srep14185
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发表时间:
2015-09-23
影响因子:
4.6
通讯作者:
Yu D
中科院分区:
文献类型:
--
作者:
Wang H;Hu Y;Pan J;Yu D
ArabidopsisVQ motif-containing proteins have recently been demonstrated to interact with several WRKY transcription factors; however, their specific biological functions and the molecular mechanisms underlying their involvement in defense responses remain largely unclear. Here, we showed that twoVQgenes,VQ12andVQ29, were highly responsive to the necrotrophic fungal pathogenBotrytis cinerea. To characterize their roles in plant defense, we generatedamiR-vq12transgenic plants by using an artificial miRNA approach to suppress the expression ofVQ12and isolated a loss-of-function mutant ofVQ29.Phenotypic analysis showed that decreasing the expression ofVQ12andVQ29simultaneously rendered theamiR-vq12 vq29double mutant plants resistant againstB. cinerea. Consistently, theB. cinerea-induced expression of defense-relatedPLANT DEFENSIN1.2 (PDF1.2)was increased inamiR-vq12 vq29. In contrast, constitutively-expressingVQ12orVQ29confered transgenic plants susceptible toB. cinerea.Further investigation revealed that VQ12 and VQ29 physically interacted with themselves and each other to form homodimers and heterodimer. Moreover, expression analysis ofVQ12andVQ29in defense-signaling mutants suggested that they were partially involved in jasmonate (JA)-signaling pathway. Taken together, our study indicates that VQ12 and VQ29 negatively regulate plant basal resistance againstB. cinerea.