在玉米中通过DNA糖系酶进行强有力的花粉基因调节
Yibing Zeng1, Julian Somers1, Harrison S Bell2
1Department of Genetics, University of Georgia, Athens, GA, USA.
Nature communications
|September 27, 2024
概括
基因甲基化和脱甲基化调节了重要的玉米花粉基因. 像MDR1和DNG102这样的DNA糖酶 (DNGs) 通过激活特定的基因,对花粉活力至关重要.
科学领域:
- 植物分子生物学 植物分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 玉米的遗传学 玉米的遗传学
背景情况:
- 基因甲基化通常会使可转移元素 (TE) 沉默,但也可以抑制特定的基因.
- 基因糖酶 (DNG) 是一种酶,可以去除DNA甲基化.
- 两个DNGs,R1的母体衰减 (MDR1) 和DNG102,对于玉米花粉的生存能力至关重要.
研究的目的:
- 在玉米花粉中识别DNG点基因.
- 了解DNA甲基化和脱甲基化在调节花粉特异性基因表达中的作用.
主要方法:
- 单花粉mRNA测序在缺乏功能MDR1或DNG102.2的玉米突变体上进行.
- 鉴定在花粉分离突变中差异表达的基因.
主要成果:
- 确定了58个候选DNG标基因,占野生类型花粉转录组的11.1%.
- 这些基因通常在其他植物组织中保持沉默.
- 候选基因往往缺乏内子,并在编码DNA中表现出TE类甲基化 (teM).
- 预计许多已识别的基因在细胞壁修饰中起作用,支持花粉管生长.
结论:
- 基因甲基化和脱甲基化在调节玉米花粉中的基因表达方面发挥着至关重要的作用.
- DNGs对于激活花粉活力和功能所需的基因至关重要.
- 这些已识别的基因代表了一种新型的花粉特异性,高度表达的基因类别,由表观遗传学调节.
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