Transcriptional regulation of strigolactone signalling in Arabidopsis

文献类型： 外文期刊

第一作者： Wang, Lei

作者： Wang, Lei;Wang, Bing;Yu, Hong;Guo, Hongyan;Lin, Tao;Kou, Liquan;Wang, Anqi;Shao, Ning;Ma, Haiyan;Chu, Jinfang;Li, Jiayang;Wang, Lei;Wang, Bing;Yu, Hong;Guo, Hongyan;Lin, Tao;Kou, Liquan;Wang, Anqi;Shao, Ning;Ma, Haiyan;Chu, Jinfang;Li, Jiayang;Xiong, Guosheng;Wang, Anqi;Chu, Jinfang;Li, Jiayang;Xiong, Guosheng;Li, Xiaoqiang;Yang, Jun

作者机构：

期刊名称：NATURE （ 影响因子：49.962； 五年影响因子：54.637 ）

ISSN： 0028-0836

年卷期： 2020 年 583 卷 7815 期

页码：

收录情况： SCI

摘要： Plant hormones known as strigolactones control plant development and interactions between host plants and symbiotic fungi or parasitic weeds(1-4). In Arabidopsis thaliana and rice, the proteins DWARF14 (D14), MORE AXILLARY GROWTH 2 (MAX2), SUPPRESSOR OF MAX2-LIKE 6, 7 and 8 (SMXL6, SMXL7 and SMXL8) and their orthologues form a complex upon strigolactone perception and play a central part in strigolactone signalling(5-10). However, whether and how strigolactones activate downstream transcription remains largely unknown. Here we use a synthetic strigolactone to identify 401 strigolactone-responsive genes in Arabidopsis, and show that these plant hormones regulate shoot branching, leaf shape and anthocyanin accumulation mainly through transcriptional activation of the BRANCHED 1, TCP DOMAIN PROTEIN 1 and PRODUCTION OF ANTHOCYANIN PIGMENT 1 genes. We find that SMXL6 targets 729 genes in the Arabidopsis genome and represses the transcription of SMXL6, SMXL7 and SMXL8 by binding directly to their promoters, showing that SMXL6 serves as an autoregulated transcription factor to maintain the homeostasis of strigolactone signalling. These findings reveal an unanticipated mechanism through which a transcriptional repressor of hormone signalling can directly recognize DNA and regulate transcription in higher plants.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序