数字农科院2.0

Transcription factor CsDREB28 regulates sugar transporters CsSWEET17 and CsSWEET15 to modulate cold resistance and plant growth in tea plants

文献类型: 外文期刊

作者: Peng, Jing;Wu, Yedie;Liu, Enbei;Wang, Jie;Li, Nana;Hao, Xinyuan;Ding, Changqing;Wang, Xinchao;Wang, Lu

作者机构:

关键词: Camellia sinensis;cold resistance;CsDREB28;CsSWEET15;CsSWEET17;plant development;plant growth;sugar allocation

期刊名称: JOURNAL OF EXPERIMENTAL BOTANY

ISSN: 0022-0957

年卷期: 2025 年

页码:

收录情况: SCIE(2025版)

摘要: Cold stress limits the geographical distribution of tea plants (Camellia sinensis) and negatively affects tea quality and yield. Sugar plays an important role in the cold stress response of tea plants, and CsSWEET17 is a plasma membrane-localized sugar transporter that regulates plant growth and freezing resistance by mediating sugar allocation. In this study, we identified the upstream regulatory factor of CsSWEET17, CsDREB28, an ERF-associated amphiphilic repression protein strongly induced by cold stress that directly inhibits the transcription of CsSWEET17 under both normal and cold stress conditions. Transient silencing of CsDREB28 enhanced the freezing resistance of tea plants by up-regulating the expression of the C-repeat-binding transcriptional pathway and CsSWEET17, and promoting the accumulation of soluble sugars. Heterologous overexpression of CsDREB28 in Arabidopsis not only significantly reduced freezing resistance but also accelerated leaf senescence, inhibited plant growth, and decreased the seed-setting rate. Further research has shown that CsDREB28 negatively regulates CsSWEET15, a reproductive organ-specific gene, and its Arabidopsis homolog, AtSWEET15, which plays an important role in reproductive growth. Overall, our findings revealed that CsDREB28 inhibits freezing resistance and plant growth by directly transcriptionally inhibiting CsSWEET15/17 to mediate sugar transport and distribution in tea plants. CsDREB28 inhibits freezing resistance and plant growth in tea plants by directly transcriptionally inhibiting CsSWEET15/17 to mediate sugar transport and distribution.

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