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植物研究 ›› 2026, Vol. 46 ›› Issue (2): 231-245.doi: 10.7525/j.issn.1673-5102.2026.02.004

• 研究论文column:Original Paper • 上一篇    下一篇

黑果枸杞LrMYB64基因克隆及功能研究

刘艺蛟1,2, 赵吉庆1,2, 陈金焕1,2()   

  1. 1.北京林业大学生物科学与技术学院,北京 100083
    2.北京林业大学林木遗传育种全国重点实验室,北京 100083
  • 收稿日期:2026-01-07 出版日期:2026-03-20 发布日期:2026-04-02
  • 通讯作者: 陈金焕 E-mail:chenjh@bjfu.edu.cn
  • 作者简介:刘艺蛟(2000—),女,硕士研究生,主要从事经济林良种繁育研究。
  • 基金资助:
    国家自然科学基金面上项目(32572017);宁夏重点研发项目(2022BBF01001-02)

Cloning and Functional Study of the LrMYB64 Gene in Lyciumruthenicum

Yijiao LIU1,2, Jiqing ZHAO1,2, Jinhuan CHEN1,2()   

  1. 1.College of Biological Sciences and Biotechnology,Beijing Forestry University,Beijing 100083
    2.National Key Laboratory of Forest Genetics and Breeding,Beijing Forestry University,Beijing 100083
  • Received:2026-01-07 Online:2026-03-20 Published:2026-04-02
  • Contact: Jinhuan CHEN E-mail:chenjh@bjfu.edu.cn

摘要:

黑果枸杞(Lyciumruthenicum)是我国西北地区特色的药食同源植物,果实富含花青素,具有极高的药用价值。为了解析黑果枸杞花青素合成的关键调控因子,该研究以黑果枸杞为材料,结合前期转录组分析克隆出候选基因LrMYB64,构建过表达载体并通过本源转化获得转基因枸杞,结合转录组测序解析其分子调控网络。结果表明:黑果枸杞中LrMYB64基因过表达,显著抑制花青素合成通路的关键结构基因(LrCHS1BLrCHS2LrF3HLrDFRLrANSLrA3GT等)的表达,使植株花青素水平降低约91.75%,显著激活多个激素信号转导相关基因(LrPR4LrPP2C51LrSAUR36LrGH3.6LrARF5LrABF4等)的表达,腋芽萌发数量提高至野生型的 3倍。综上,该研究初步证实LrMYB64基因通过负向调控花青素合成通路和正向调控激素信号转导通路,形成 1个以其为核心的基因调控网络,从而协同调控植物的次生代谢与激素响应过程。

关键词: 黑果枸杞, LrMYB64基因, 花青素, 腋芽, 转录组测序, 功能分析

Abstract:

Lyciumruthenicum, a characteristic food-medicine plant in northwestern China, accumulates abundant anthocyanins in its fruits and possesses high pharmaceutical value. In order to identify the key regulators of anthocyanin biosynthesis and to clarify their coupled effects on lateral-bud development, the candidate gene LrMYB64 was cloned, an overexpression vector was constructed and transformed into L. ruthenicum, and the underlying molecular network was explored using transcriptome sequencing. The results showed that overexpression of LrMYB64 genein L. ruthenicum significantly suppressed the expression of key structural genes in the anthocyanin biosynthetic pathway-including LrCHS1BLrCHS2LrF3HLrDFRLrANS, and LrA3GT-leading to the reduction by 91.75% in anthocyanin level. Meanwhile, it markedly upregulated multiple hormone-signaling genes such as LrPR4LrPP2C51LrSAUR36LrGH3.6LrARF5, and LrABF4, increasing lateral bud outgrowth to approximately three times that of the wild type. Together, these findings indicated that LrMYB64 gene orchestrated a gene regulatory network through which it repressed anthocyanin biosynthesis while promoting hormone signal transduction, thereby coordinating plant secondary metabolism and hormonal responses.

Key words: Lyciumruthenicum, LrMYB64 gene, anthocyanin, lateral bud, transcriptome sequencing, functional analysis

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