印记和DNA甲基化在水内:对种子进化的影响
Rebecca A Povilus1, Caroline A Martin1,2, Lindsey L Bechen1
1Whitehead Institute for Biomedical Research, 455 Main Street, Cambridge, MA 02142, USA.
Molecular biology and evolution
|October 24, 2025
概括
水种子中的基因组印记和DNA甲基化表明,这些表观遗传过程是开花植物的祖先. 这些源代效应可能早于关键的血管精子分歧.
科学领域:
- 植物生殖生物学 植物生殖生物学
- 表观遗传学和基因组学
- 进化植物学的植物学.
背景情况:
- 内,一个关键的血管精子创新,支持胚胎发育,是基因组印记和表观遗传修饰的主要网站.
- 父母的起源效应,包括DNA甲基化,在单种植物和幼虫植物中很常见,但在早期分离的血统中很少被理解,例如Nymphaeales (百合花).
- 淋巴体表现出不寻常的种子特征,包括双胞体内和周,这使得它们对研究种子进化有价值.
研究的目的:
- 为了研究DNA甲基化和基因印记在Nymphaea thermarum和Nymphaea dimorpha的种子,两种姐妹物种的百合花.
- 确定父特异性表观遗传修饰和基因组印记是否是血管精子内的祖先特征.
- 探索印记,DNA甲基化和早期血管精子中的种子发育策略之间的进化相互作用.
主要方法:
- 在Nymphaea物种的内中分析DNA甲基化模式.
- 对基因印记的检查,特别是识别母体和父体表达的印记基因.
- 与单种植物和幼植物的现有数据进行比较分析,以推断祖先状态.
主要成果:
- 证据显示,水内精子中存在母体表达的印记基因.
- 在内体内观察到母性和父性遗传基因组之间的差异性DNA甲基化.
- 这些发现表明,基因组印记和差异甲基化可能是血管精子内的祖先条件.
结论:
- 母性表达的印记基因和差异性DNA甲基化代表了血管精子内的祖先状态.
- 其他种子特征,如内精和父性表达的印记基因,可能代表了后来的进化适应.
- 这些发现揭示了在种子中的后代发育中父母控制的进化冲突.
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