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Updated: Jan 7, 2026

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希斯乳化调解了香冷却诱导的皮色的外源性甲酸抑制
Junru Wang1,2, Hua Li1, Wen Zeng1
1State Key Laboratory of Tropical Crop Breeding, Institute of Tropical Bioscience and Biotechnology & Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya 572024, China.
Plant physiology
|December 12, 2025
概括
外源性酸 (AsA) 通过表观遗传沉默关键基因,防止香皮在冷藏期间变棕. 这涉及到基因组乳化,为保存水果质量提供了新的策略.
科学领域:
- 植物生理学 植物生理学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 收获后生物学 收获后生物学
背景情况:
- 在冷藏期间香皮的色会造成大量的收获后损失.
- 在这个过程中,连接抗氧化剂代谢和转录调节的分子机制尚未完全理解.
研究的目的:
- 阐明酸 (AsA) 缓解香皮中冷却引起的色的分子机制.
- 调查表观遗传修饰的作用,特别是基因素乳糖化,在调节抗氧化剂代谢和基因表达.
主要方法:
- DNase-seq用于分析在冷应力下染色质可访问性变化.
- DNA亲和力净化测序 (DAP-seq) 和酵母单杂交 (Y1H) 试验以确定转录因子结合.
- 过时的过度表达测试以确认基因功能.
- 测量甲酸水平,活性氧物种 (ROS) 和基因素乳酸化 (H3K18la).
主要成果:
- 寒冷压力增加了 WRKY 转录因子 (TF) 基因促进者的染色质可访问性.
- WRKY TFs与酸盐氧化酶 (MaAAO1) 的促进剂结合,增加其表达,导致AsA耗尽和ROS积累,从而促进棕色化.
- AsA治疗降低了MaWRKY基因中的H3K18la水平,降低了它们的可访问性和表达,从而降低了MaAAO1的表达.
- 证实MaAAO1驱动皮肤色,而AsA通过将氧化还原信号与依赖乳化的染色质沉默联系起来来破坏这一过程.
结论:
- 亚酸 (AsA) 通过通过H3K18la介导的染色质重塑来抑制WRKY-AAO调节模块,减轻香皮的冷却损伤.
- 这项研究揭示了一种对氧化还原敏感的表观遗传开关,涉及到氧化途径的调节,并提供了改善水果收获后质量的潜在策略.
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