文献类型： 外文期刊
作者： Yang, Ziyi 1 ; Bai, Wanqing 1 ; Guo, Guanghui 2 ; Huang, Shuxian 1 ; Wang, Yufan 1 ; Zhou, Yun 2 ; Zhang, Yunwei 1 ; Sun, Jiaqiang 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, State Key Lab Crop Gene Resources & Breeding, Beijing 100081, Peoples R China
2.Henan Univ, Coll Agr, Sch Life Sci, State Key Lab Crop Stress Adaptat & Improvement, Kaifeng 475004, Peoples R China
关键词： wheat; spike architecture; QIP3; EAR motif; TOPLESS
期刊名称：PLANT JOURNAL （ 影响因子：5.7； 五年影响因子：7.0 ）
ISSN： 0960-7412
年卷期： 2025 年 122 卷 2 期
页码：
收录情况： SCI
摘要： Spike architecture is a critical determinant of grain yield in wheat; yet the regulatory mechanisms remain poorly understood. Here, we demonstrate that the AP2 transcription factor Q directly represses the expression of TaMYB30-6A, a gene associated with spike length in wheat. We further identify QIP3 as a Q-interacting protein harboring an N-terminal EAR motif. Simultaneously, we reveal that QIP3 exhibits transcriptional repression activity, dependent on the EAR motif, and physically interacts with the transcriptional corepressor TaTPL. Importantly, the clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9 (CRISPR/Cas9)-generated qip3-aabbdd mutants exhibit reduced plant height and increased spike length phenotypes. Furthermore, RNA-seq and RT-qPCR assays show that QIP3 negatively regulates the expression of the Q target gene TaMYB30-6A in wheat. Collectively, we propose that the EAR motif-containing QIP3 interacts with Q to regulate spike architecture by recruiting the transcriptional corepressor TaTPL in wheat.
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