The blue light receptor CRY1 interacts with GID1 and DELLA proteins to repress gibberellin signaling and plant growth

• DOI: 10.1016/j.xplc.2021.100245
• Publication Date: 2021-09-22T23:19:35Z
• Authors: Baiqiang Yan; Zongju Yang; Guanhua He; Yexing Jing; Huixue Dong; Lan Ju; Yunwei Zhang; Yingfang Zhu; Yun Zhou; Jiaqiang Sun
• Keywords: Coleoptile

Improvements in plant architecture, such as reduced height under high-density planting, are important for agricultural production. Light and gibberellin (GA) essential external internal cues that affect architecture. In this study, we characterize the direct interaction of distinct receptors link light GA signaling Arabidopsis (Arabidopsis thaliana) wheat (Triticum aestivum L.). We show receptor CRY1 represses through with all five DELLA proteins promotion RGA protein accumulation Arabidopsis. Genetic analysis shows CRY1-mediated growth repression is achieved by means proteins. Interestingly, find also directly interacts GID1 to competitively inhibit GID1-GAI interaction. overexpression TaCRY1a reduces coleoptile both TaGID1 Rht1 attenuate TaGID1-Rht1 Based on these findings, propose photoreceptor inhibits GID1-DELLA interaction, thereby stabilizing enhancing their growth.