Tiller Number1 encodes an ankyrin repeat protein that controls tillering in bread wheat
文献类型: 外文期刊
第一作者: Dong, Chunhao
作者: Dong, Chunhao;Zhang, Lichao;Zhang, Qiang;Yang, Yuxin;Li, Danping;Xie, Zhencheng;Cui, Guoqing;Chen, Yaoyu;Wu, Lifen;Li, Zhan;Liu, Guoxiang;Zhang, Xueying;Zhao, Guangyao;Xia, Chuan;Jia, Jizeng;Sun, Jiaqiang;Kong, Xiuying;Liu, Xu;Zhang, Qiang;Liu, Cuimei;Chu, Jinfang;Chu, Jinfang
作者机构:
期刊名称:NATURE COMMUNICATIONS ( 影响因子:16.6; 五年影响因子:17.0 )
ISSN:
年卷期: 2023 年 14 卷 1 期
页码:
收录情况: SCI
摘要: Tiller number is an important agronomic trait of wheat. Here, the authors clone a positive regulator of wheat tiller number and show that the encoded ankyrin repeat protein can promote tiller bud outgrowth through inhibiting ABA biosynthesis and signaling. Wheat (Triticum aestivum L.) is a major staple food for more than one-third of the world's population. Tiller number is an important agronomic trait in wheat, but only few related genes have been cloned. Here, we isolate a wheat mutant, tiller number1 (tn1), with much fewer tillers. We clone the TN1 gene via map-based cloning: TN1 encodes an ankyrin repeat protein with a transmembrane domain (ANK-TM). We show that a single amino acid substitution in the third conserved ankyrin repeat domain causes the decreased tiller number of tn1 mutant plants. Resequencing and haplotype analysis indicate that TN1 is conserved in wheat landraces and modern cultivars. Further, we reveal that the expression level of the abscisic acid (ABA) biosynthetic gene TaNCED3 and ABA content are significantly increased in the shoot base and tiller bud of the tn1 mutants; TN1 but not tn1 could inhibit the binding of TaPYL to TaPP2C via direct interaction with TaPYL. Taken together, we clone a key wheat tiller number regulatory gene TN1, which promotes tiller bud outgrowth probably through inhibiting ABA biosynthesis and signaling.
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