文献类型： 外文期刊
作者： Xu, Biyu 1 ; Zhang, Jun 1 ; Shi, Yue 1 ; Dai, Fan 1 ; Jiang, Tao 1 ; Xuan, Lisha 1 ; He, Ying 1 ; Zhang, Zhiyuan 2 ; Deng, Jieqiong 3 ; Zhang, Tianzhen 1 ; Hu, Yan 1 ; Si, Zhanfeng 1 ;
作者机构： 1.Zhejiang Univ, Coll Agr & Biotechnol, Agron Dept, Hangzhou 310029, Peoples R China
2.Zhejiang Univ, Hainan Inst, Sanya 572025, Peoples R China
3.Sichuan Acad Agr Sci, Ind Crop Res Inst, Chengdu 610066, Peoples R China
4.Zhejiang Univ, Rural Dev Acad, Hangzhou 310029, Peoples R China
关键词： cotton; map-based cloning; bulked segregation analysis; stem trichomes; virus induced gene silencing
期刊名称：PLANT JOURNAL （ 影响因子：7.2； 五年影响因子：7.9 ）
ISSN： 0960-7412
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Trichomes, the outward projection of plant epidermal tissue, provide an effective defense against stress and insect pests. Although numerous genes have been identified to be involved in trichome development, the molecular mechanism for trichome cell fate determination is not well enunciated. Here, we reported GoSTR functions as a master repressor for stem trichome formation, which was isolated by map-based cloning based on a large F-2 segregating population derived from a cross between TM-1 (pubescent stem) and J220 (smooth stem). Sequence alignment revealed a critical G-to-T point mutation in GoSTR's coding region that converted codon 2 from GCA (Alanine) to TCA (Serine). This mutation occurred between the majority of Gossypium hirsutum with pubescent stem (GG-haplotype) and G. barbadense with glabrous stem (TT-haplotype). Silencing of GoSTR in J220 and Hai7124 via virus-induced gene silencing resulted in the pubescent stems but no visible change in leaf trichomes, suggesting stem trichomes and leaf trichomes are genetically distinct. Yeast two-hybrid assay and luciferase complementation imaging assay showed GoSTR interacts with GoHD1 and GoHOX3, two key regulators of trichome development. Comparative transcriptomic analysis further indicated that many transcription factors such as GhMYB109, GhTTG1, and GhMYC1/GhDEL65 which function as positive regulators of trichomes were significantly upregulated in the stem from the GoSTR-silencing plant. Taken together, these results indicate that GoSTR functions as an essential negative modulator of stem trichomes and its transcripts will greatly repress trichome cell differentiation and growth. This study provided valuable insights for plant epidermal hair initiation and differentiation research.
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