独角麦内酯通过抑制亚麻酸生物合成中的DWARF53来促进棉纤维细胞伸长

IF 10.7 1区生物学 Q1 CELL BIOLOGY

Developmental cell Pub Date : 2024-12-27 DOI:10.1016/j.devcel.2024.12.009

Huiqin Wang, Liping Zhu, Mengyuan Fan, Shuangshuang Weng, Xin Zhou, Hanxuan Zhao, Yongcui Shen, Jiaquan Chai, Liyong Hou, Miaomiao Hao, Rezwan Tanvir, Ling Li, Guanghui Xiao

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引用次数: 0

摘要

独角孤内酯（SL）是植物发育所必需的一种植物激素。DWARF53 （D53）在SL信号传导中起转录抑制作用。然而，D53在棉花（Gossypium hirsutum, Gh）纤维发育中的作用尚不清楚。在这里，我们发现GhD53通过抑制GhFAD3基因的转录抑制纤维伸长，GhFAD3基因控制亚麻酸（C18:3）的生物合成。机制上，GhD53与sl相关转录激活因子（GhSLRF）相互作用，阻止其结合Omega-3脂肪酸去饱和酶基因（GhFAD3）启动子，从而抑制GhFAD3转录。在SL暴露后，GhD53被降解并导致GhSLRF激活。这种激活进一步促进了GhFAD3转录、C18:3生物合成和纤维伸长。我们的研究结果确定了SL如何通过D53控制细胞伸长的分子机制，并提供了通过SL应用提高棉花品质的潜在策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Strigolactone promotes cotton fiber cell elongation by de-repressing DWARF53 on linolenic acid biosynthesis

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Strigolactone promotes cotton fiber cell elongation by de-repressing DWARF53 on linolenic acid biosynthesis

Strigolactone (SL) is a plant hormone required for plant development. DWARF53 (D53) functions as a transcription repressor in SL signaling. However, the role of D53 in cotton (Gossypium hirsutum, Gh) fiber development remains unclear. Here, we identify that GhD53 suppresses fiber elongation by repressing transcription of GhFAD3 genes, which control linolenic acid (C18:3) biosynthesis. Mechanistically, GhD53 interacts with SL-related transcriptional activate factor (GhSLRF) to prevent its binding on Omega-3 fatty acid desaturase gene (GhFAD3) promoters, thereby inhibiting GhFAD3 transcription. Upon SL exposure, GhD53 is degraded and leads to GhSLRF activation. This activation further promotes GhFAD3 transcription, C18:3 biosynthesis, and fiber elongation. Our findings identify the molecular mechanism of how SL controls cell elongation via D53 and offer potential strategies to improve cotton quality through SL application.

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来源期刊

Developmental cell 生物-发育生物学

CiteScore

18.90

自引率

1.70%

发文量

203

审稿时长

3-6 weeks

期刊介绍： Developmental Cell, established in 2001, is a comprehensive journal that explores a wide range of topics in cell and developmental biology. Our publication encompasses work across various disciplines within biology, with a particular emphasis on investigating the intersections between cell biology, developmental biology, and other related fields. Our primary objective is to present research conducted through a cell biological perspective, addressing the essential mechanisms governing cell function, cellular interactions, and responses to the environment. Moreover, we focus on understanding the collective behavior of cells, culminating in the formation of tissues, organs, and whole organisms, while also investigating the consequences of any malfunctions in these intricate processes.