黑色素通过调节CmDREB1A/E来调节proline代谢,以增强西瓜水果的寒冷耐受性
Shuai Huang1, Ying Bi1, Shifeng Cao1
1College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi, 830052, China.
Plant physiology and biochemistry : PPB
|May 20, 2025
概括
在寒冷压力下,黑素 (MT) 治疗增强了瓜水果中普林的积累. 这通过调节CmP5CS等关键基因和激活转录因子CmDREB1A和CmDREB1E来发生,从而改善寒冷耐受性.
科学领域:
- 植物生理学 植物生理学
- 分子生物学分子生物学
- 农业科学 农业科学
背景情况:
- 寒冷压力显著影响水果的质量和保质期.
- 氨酸积累是已知的植物对非生物压力的反应.
- 黑色素 (MT) 越来越多地被认为是它在植物应激耐受性中的作用.
研究的目的:
- 在寒冷压力下调查黑激素对林积累在瓜水果中的调节机制.
- 阐明特定基因和转录因子在这个过程中的作用.
- 确定MT如何提高香的寒冷耐受性.
主要方法:
- 关于自由普罗林含量的定量分析.
- 对P5CS,OAT和ProDH进行基因表达分析 (RT-qPCR).
- 对ProDH的酶活性测定.
- 酵母的一混合测试以确定转录因子结合.
- 电泳移动转移试验 (EMSA) 和双露西法酶记者试验用于验证促进体结合.
主要成果:
- MT治疗显著增加了冷压瓜果的自由普罗林含量.
- MT上调调节了Δ1-pyrroline-5-carboxylate synthase (P5CS) 和ornithine δ-aminotransferase (OAT) 基因的表达.
- MT降低了氨酸脱酶 (ProDH) 转录和酶活性.
- 鉴定出CmDREB1A和CmDREB1E转录因子是CmP5CS促进体的结合剂.
- 通过激活调节CmP5CS表达的CmDREB1A和CmDREB1E,MT增强了耐寒性.
结论:
- 在寒冷压力下,黑色素治疗促进了瓜水果中的林积累.
- 该机制涉及对P5CS和OAT进行上调,并对ProDH进行下调.
- 黑色素通过CmDREB1A/CmDREB1E-CmP5CS通路增强了对寒冷的耐受性.
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