J Integr Plant Biol ›› 2025, Vol. 67 ›› Issue (1): 169-190.DOI: 10.1111/jipb.13802  cstr: 32098.14.jipb.13802

• • 上一篇    

  

  • 收稿日期:2024-05-02 接受日期:2024-09-16 出版日期:2025-01-01 发布日期:2024-11-12

The miR3367–lncRNA67–GhCYP724B module regulates male sterility by modulating brassinosteroid biosynthesis and interacting with Aorf27 in Gossypium hirsutum

Anhui Guo1†, Hushuai Nie1†, Huijing Li1, Bin Li1, Cheng Cheng1, Kaiyun Jiang1, Shengwei Zhu2, Nan Zhao1 and Jinping Hua1*   

  1. 1. Laboratory of Cotton Genetics, Genomics and Breeding/Joint Laboratory for International Cooperation in Crop Molecular Breeding, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
    2. Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
    †These authors contributed equally.
    *Correspondence: Jinping Hua (jinping_hua@cau.edu.cn)
  • Received:2024-05-02 Accepted:2024-09-16 Online:2025-01-01 Published:2024-11-12
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (32372128 to J.H., 32201713 to A.G.), and the China Postdoctoral Science Foundation (2020M680766 to H.N.).

Abstract: Cytoplasmic male sterile (CMS) lines play a crucial role in utilization of heterosis in crop plants. However, the mechanism underlying the manipulation of male sterility in cotton by long non-coding RNA (lncRNA) and brassinosteroids (BRs) remains elusive. Here, using an integrative approach combining lncRNA transcriptomic profiles with virus-induced gene silencing experiments, we identify a flower bud-specific lncRNA in the maintainer line 2074B, lncRNA67, negatively modulating with male sterility in upland cotton (Gossypium hirsutum). lncRNA67 positively regulates cytochrome P274B (GhCYP724B), which acted as an eTM (endogenous target mimic) for miR3367. The suppression of GhCYP724B induced symptoms of BR deficiency and male semi-sterility in upland cotton as well as in tobacco, which resulted from a reduction in the endogenous BR contents. GhCYP724B regulates BRs synthesis by interacting with GhDIM and GhCYP90B, two BRs biosynthesis proteins. Additionally, GhCYP724B suppressed a unique chimeric open reading frame (Aorf27) in 2074A mitochondrial genome. Ectopic expression of Aorf27 in yeast inhibited cellular growth, and over expression of Aorf27 in tobacco showed male sterility. Overall, the results proved that the miR3367–lncRNA67–GhCYP724B module positively regulates male sterility by modulating BRs biosynthesis. The findings uncovered the function of lncRNA67–GhCYP724B in male sterility, providing a new mechanism for understanding male sterility in upland cotton.

Key words: brassinosteroids, GhCYP724B, lncRNA67, male sterility, mitochondrial Aorf27, upland cotton (G. hirsutum)

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