臭氧压力诱导的DNA甲基化变异及其在狐尾小米的跨代遗传
Long Wang1,2, Yang Liu1,3, Xiaohan Song1
1Laboratory of Plant Epigenetics and Evolution, School of Life Sciences, Liaoning University, Shenyang, China.
Frontiers in plant science
|October 10, 2024
概括
臭氧 (O3) 压力影响作物,但植物使用DNA甲基化作为防御. 这项研究表明,臭氧诱导狐尾小米的DNA甲基化变化,其中一些变异传给后代,有助于植物的弹性.
科学领域:
- 植物科学 植物科学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 环境应激反应环境应激反应
背景情况:
- 较高的臭氧 (O3) 度会损害作物,需要植物防御机制.
- 基因甲基化是植物基因稳定性和抗压能力的关键表观遗传调节剂.
- 在O3压力下,DNA甲基化的表观遗传反应和代际传播尚未得到充分理解.
研究的目的:
- 为了研究表观遗传机制,特别是DNA甲基化变异,在O3压力下,在两代 (S0和S1) 的狐尾小米中研究表观遗传机制.
- 确定潜在的表观遗传修饰部位和参与植物适应O3压力的基因.
- 探索O3诱导的表观遗传变化的代际遗传模式.
主要方法:
- 模拟O3压力使用开放式顶部室 (OTC) 在200nmolmol-1两代狐尾小米.
- 评估了表型损伤,并使用了甲基化敏感放大多态性 (MSAP) 分析来检测DNA甲基化变异.
- 从MSAP分析中恢复和测序差分放大序列.
主要成果:
- 氧3压力导致狐尾小米的明显损伤 (变黄,卷曲,干燥),S0和S1代的严重程度相似.
- MSAP分析显示了显著的O3诱导甲基化变化 (10.82%13.59%),包括去甲基化 (0.52%5.58%) 和高甲基化 (0.35%2.76%).
- 与S0相比,S1代在CNG位点表现出更广泛的脱甲基化,观察到A-A-B-A遗传模式;确定了六个与压力相关的序列.
结论:
- DNA甲基化变异是植物适应O3压力的关键机制.
- 氧3压力诱导狐尾小米的跨代表观遗传变化,特别是去甲基化.
- 已识别的与压力相关的DNA序列为植物对非生物压力的反应的表观遗传调节提供了洞察力.
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