Journal of Integrative Agriculture ›› 2023, Vol. 22 ›› Issue (7): 2015-2024.DOI: 10.1016/j.jia.2022.09.022

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HD-Zip转录因子GhHB12通过调控生长素信号抑制棉花株高

  

  • 收稿日期:2022-07-25 接受日期:2022-08-26 出版日期:2023-07-20 发布日期:2022-08-26

The HD-Zip transcription factor GhHB12 represses plant height by regulating the auxin signaling in cotton

LIU Yan1*, WANG Wei-ping1*, ZHANG Lin2, ZHU Long-fu2, ZHANG Xian-long2, HE Xin1#   

  1. 1 College of Agronomy, Hunan Agricultural University, Changsha 410128, P.R.China 

    2 National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, P.R.China

  • Received:2022-07-25 Accepted:2022-08-26 Online:2023-07-20 Published:2022-08-26
  • About author:#Correspondence HE Xin, E-mail: hexinzhsh@126.com * These authors contributed equally to this study.
  • Supported by:
    This work was supported by the Science and Technology Innovation Program of Hunan Province , China (2020RC2057).

摘要:

陆地棉是世界上最重要的纤维作物。株高作为植物株型的重要组成部分,影响着作物的种植模式、产量和经济系数。前期研究中,我们分离并鉴定了一个棉花HD-ZIP基因(GhHB12),该基因调控棉花的非生物和生物胁迫应答反应和生长发育过程。在本研究中,我们证明GhHB12基因受生长素诱导表达,过表达GhHB12基因能激活HY5、ATH1和HAT4基因的表达,抑制生长素的时空分布、极性运输和信号传导,并改变细胞壁扩张相关基因的表达,最终抑制棉花株高。这些结果表明,GhHB12可以通过影响生长素的信号传导和细胞壁的扩展来调节棉花株高。

Abstract: Upland cotton (Gossypium hirsutum L.) is the most important natural textile fiber crop worldwide. Plant height (PH) is a significant component of plant architecture, strongly influencing crop cultivation patterns, overall yield, and economic coefficient. However, cotton genes regulating plant height have not been fully identified. Previously, an HD-Zip gene (GhHB12) was isolated and characterized in cotton, which regulates the abiotic and biotic stress responses and the growth and development processes. In this study, we showed that GhHB12 was induced by auxin. Moreover, overexpression of GhHB12 induces the expression of HY5, ATH1, and HAT4, represses the spatial-temporal distribution, polar transport, and signaling of auxin, alters the expression of genes involved in cell wall expansion, and restrains the plant height in cotton. These results suggest a role of GhHB12 in regulating cotton plant height, which could be achieved by affecting the auxin signaling and cell wall expansion.

Key words: cotton , GhHB12 , plant height , auxin , cell wall , HD-Zip