AIW1 and AIW2, two ABA-induced WD40 repeat-containing transcription repressors function redundantly to regulate ABA and salt responses in Arabidopsis

Journal of plant interactions

article

Xutong Wang¹  Chen Zhang¹  Li Yan²  Tianya Wang¹  Shucai Wang¹  Wei Wang¹  Yating Wang¹  Ganghua Zhou¹  Shanda Liu¹  Dongqiu Li¹  Adnan¹  Saddam Hussain¹  Sajjad Ahmed¹ 

[1] a Key Laboratory of Molecular Epigenetics of MOE, Institute of Genetics and Cytology, Northeast Normal University;b Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University

关键词: ABA-induced WD40-repeat 1;    AIW2;    WD40-repeat protein;    transcription factor;    abscisic acid;    salt tolerance;   

DOI  :  10.1080/17429145.2020.1778110

学科分类：纳米科学和纳米技术

来源: Taylor & Francis

【 摘 要 】

WDR proteins in plants regulate multiple aspects of plant growth and development, as well as plant responses to environmental stimuli. Here, we report the identification of AIW1 (ABA-induced WD40-repeat 1) and AIW2 as novel regulators of salt responses in Arabidopsis. RT-PCR results show that the expression of AIW1 and AIW2 were induced by ABA. Transfection assays in protoplasts show that AIW1 and AIW2 were nucleus proteins and functioned as transcription repressors. When overexpressed in Arabidopsis, AIW1 promoted root elongation, and reduced seedlings sensitivity to ABA. On the other hand, aiw1 aiw2 double mutants showed an increased sensitivity to ABA in seed germination assays. In addition, salt tolerance was reduced in the 35S:AIW1 transgenic plants in root elongation assays. Taken together, our results suggest that AIW1 and AIW2 are ABA-induced plant specific WD40 repeat-containing transcription repressors, and AIW1 and AIW2 function redundantly to regulate ABA and salt responses in Arabidopsis.

【 授权许可】

CC BY|CC BY-NC