The Arabidopsis IDD14 transcription factor interacts with bZIP-type ABFs/AREBs and cooperatively regulates ABA-mediated drought tolerance

编号 040036002

推送时间 20220912

研究领域 森林培育 

年份 2022 

类型 期刊 

语种 英语

标题 The Arabidopsis IDD14 transcription factor interacts with bZIP-type ABFs/AREBs and cooperatively regulates ABA-mediated drought tolerance

来源期刊 New Phytologist

期 第360期

发表时间 20220716

关键词 ABA;  ABF/AREB;  Arabidopsis;  IDD14;  drought stress;  protein complex; 

摘要 The IDD transcription factors mediate various aspects of plant growth and development. We previously reported that an Arabidopsis IDD subfamily regulates spatial auxin accumulation and thus organ morphogenesis and gravitropic responses. However, its functions in stress responses are not well defined.
Here, we use a combination of physiological, biochemical, molecular, and genetic approaches to provide evidence that the IDD14 cooperates with bZIP-type binding factors/AREB-binding proteins (ABFs/AREBs) in ABA-mediated drought tolerance.
idd14-1D, a gain-of-function mutant of IDD14, exhibits decreased leaf water loss and improved drought tolerance, whereas inactivation of IDD14 in idd14-1 results in increased transpiration and reduced drought tolerance. Altered IDD14 expression affects ABA sensitivity and ABA-mediated stomatal closure. IDD14 can physically interact with ABF1-4 and subsequently promote their transcriptional activities. Moreover, ectopic expression and mutation of ABFs could suppress and enhance plant sensitivity to drought stress in the idd14-1 mutant, respectively.
Our results demonstrate that IDD14 forms a functional complex with ABFs and positively regulates drought-stress responses, thus revealing a previously unidentified role of IDD14 in ABA signaling and drought responses.

服务人员 孙小满

服务院士 尹伟伦

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