数字农科院2.0

Transcriptome and Phytohormone Analysis Reveal the Regulatory Mechanism of Internode Elongation in New Shoots of Tea Plants (Camellia sinensis)

文献类型： 外文期刊

作者： Zhang, Liping;Shen, Hong;Zhu, Shuixing;Mao, Yihu;Li, Yang;Liu, Haoyang;Jiang, Hongxin;Mohamed, Ahmed Salem;Wang, Peiqiang;Li, Xin

作者机构：

关键词： DELLA;Gibberellins (GAs);Internode;Jasmonate (JA);New shoots;Phytohormones;Tea plant (Camellia sinensis);Transcriptome sequencing

期刊名称： JOURNAL OF PLANT GROWTH REGULATION

ISSN： 0721-7595

年卷期： 2026 年

页码：

收录情况： SCIE（2025版）

摘要： Exploiting mechanical picking of fresh leaves is an urgent task in the tea industry. The internode length of new shoots is one of the key traits determining the suitability of tea plants for mechanical picking. In this study, we explored the mechanisms regulating tea internode elongation through transcriptome sequencing and endogenous hormone analysis in two cultivars with different internode length. The results indicated that internode elongation is associated with the increased parenchyma cell diameter in the internode. One CsDELLA gene (CsDELLA2), three CsMYC transcription factors (TFs) (CsMYC1.2, CsMYC1.3, and CsAMS.2), two CsJAZ TFs (CsJAZ1 and CsJAZ3), and three secondary cell wall-related genes (CsEXP1, CsCESA1 and CsXTH1) have been identified as potential candidate genes. These results provide candidate genes for obtaining tea plants with longer internodes which are suitable for mechanical harvesting.

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