Developmental Cell:赤霉素通过一对平行的信号级联促进棉花纤维细胞伸长(陕西师范大学)

学术   2024-02-25 11:15   江苏  
二月
25

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Gibberellin acid promotes single-celled fiber elongation through the activation of two signaling cascades in cotton

第一作者

:Peng He

第一单位

:陕西师范大学

通讯作者

:Guanghui Xiao


Abstract

背景回顾:The agricultural green revolution spectacularly enhanced crop yield through modification of gibberellin (GA) signaling. 


提出问题However, in cotton, the GA signaling cascades remain elusive, limiting our potential to cultivate new cotton varieties and improve yield and quality. 


结果1-GA-SLR1-ZFP8/BLH1Here, we identified that GA prominently stimulated fiber elongation through the degradation of DELLA protein GhSLR1, thereby disabling GhSLR1’s physical interaction with two transcription factors, GhZFP8 and GhBLH1


结果2-BLH1-KCS12-长链脂肪酸合成Subsequently, the resultant free GhBLH1 binds to GhKCS12 promoter and activates its expression to enhance VLCFAs biosynthesis


结果3-ZFP8-SDCP1-PIF3-细胞伸长With a similar mechanism, the free GhZFP8 binds to GhSDCP1 promoter and activates its expression. As a result, GhSDCP1 upregulates the expression of GhPIF3 gene associated with plant cell elongation.  


结论Ultimately, the two parallel signaling cascades synergistically promote cotton fiber elongation. Our findings outline the mechanistic framework that translates the GA signal into fiber cell elongation, thereby offering a roadmap to improve cotton fiber quality and yield.


摘 要

农业绿色革命通过修饰赤霉素(GA)信号转导极大地增加了农业产量。但是,棉花中GA信号转导级联仍不清楚,限制了棉花新品种的培育以及产量和质量的改良。本文中,作者发现GA能够通过降解DELLA蛋白GhSLR1,进而解除GhSLR1与GhZFP8和GhBLH1转录因子的物理互作,从而刺激纤维伸长。被释放的GhBLH1会结合到GhKCS12基因启动子上,激活GhKCS12基因的表达,从而增强VLCFAs合成。另外,被释放的GhZFP8能够结合到GhSDCP1基因启动子上,激活GhSDCP1基因的表达。而GhSDCP1能够上调GhPIF3基因的表达,从而促进植物细胞伸长。最终,两条平行的信号转导级联协同促进了棉花纤维伸长。本文的研究结果揭示了棉花中GA信号与纤维细胞伸长之间的分子关联,从而为棉花纤维的产量和质量改良提供了一个可行之路。





 肖光辉 

个人简介:

2006-2010年,吉林大学,学士;

2010-2015年,北京大学,博士;

2016-2019年,陕西师范大学,副教授;

2018-2020年,香港浸会大学,博后;

2020年-至今,陕西师范大学,教授。


研究方向:棉纤维细胞发育的分子机制研究及根向重力生长研究。


doi: https://doi.org/10.1016/j.devcel.2024.01.018

Journal: Developmental Cell
Published date: February 14, 2024

Cite:
Peng He, Liping Zhu, Xin Zhou, Xuan Fu, Yu Zhang, Peng Zhao, Bin Jiang, Huiqin Wang, Guanghui Xiao. Gibberellin acid promotes single-celled fiber elongation through the activation of two signaling cascades in cotton. Developmental Cell, 2024. DOI: 10.1016/j.devcel.2024.01.018


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植物类SCI摘要
收集植物学杂志Plant Cell, Nat Plants, Mol Plant, Plant Physiol, New Phytol, Plant Biotechnol J等及CNS(含子刊)植物学方向的优秀论文摘要。
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