Role of Transcription Factor HAT1 in ModulatingArabidopsis thalianaResponse toCucumber mosaic virus

• DOI: 10.1093/pcp/pcw109
• Publication Date: 2016-06-23T04:03:42Z
• Authors: Li-Juan Zou; Xing-Guang Deng; Xue-Ying Han; Wen-Rong Tan; Li-Jun Zhu; De-Hui Xi; Da-Wei Zhang; Hong-Hui Lin
• Keywords: Jasmonic acid; Cauliflower mosaic virus

Arabidopsis thaliana homeodomain-leucine zipper protein 1 (HAT1) belongs to the (HD-Zip) family class II that plays important roles in plant growth and development as a transcription factor. To elucidate further role of HD-Zip factors defense, A. hat1, hat1hat3 hat1hat2hat3 mutants HAT1 overexpression plants (HAT1OX) were challenged with Cucumber mosaic virus (CMV). HAT1OX displayed more susceptibility, while loss-of-function exhibited less susceptibility CMV infection. its close homologs HAT2 HAT3 function redundantly, triple mutant increased resistance compared hat1 mutants. Furthermore, induction antioxidant system (the activities expression enzymatic antioxidants) defense-associated genes down-regulated but up-regulated when Col-0 after Further evidence showed involvement anti-CMV defense response might be dependent on salicylic acid (SA) not jasmonic (JA). The SA level or synthesis-related was decreased infection, there little difference JA gene among defective plants. In addition, is accumulation. Taken together, our study indicated negatively regulates responses CMV.