Yanzy的个人博客分享 http://blog.sciencenet.cn/u/Yanzy

博文

Nat Commun.∣中科院逆境中心发现与叶片衰老和局部气候适应性...

已有 2659 次阅读 2018-2-1 22:16 |系统分类:论文交流

2018年1月31日nature communications在线发表了题为“A naturally occurring epiallele associates with leaf senescence and local climate adaptation in Arabidopsis accessions”的文章。


本文由中国科学院上海植物逆境生物学研究中心朱健康课题组完成。文章发现了一个新的表观遗传等位基因,其甲基化状态可以稳定遗传,并与叶片衰老和局部气候适应性相关


摘要:

表观遗传变异可以促进对变化环境的适应,但是缺乏天然的表观遗传等位基因对适应性进化贡献的证据。在这里,我们鉴定了一个名为“NMR19”(天然存在的DNA甲基化变异区域19)的反转录转座子,其在拟南芥不同种质的甲基化和基因组的位置不同。根据NMR19-4和NMR19-16的位置,我们将它们归类为NMR19,并发现NMR19-4是一个表观遗传的等位基因,可以通过调节PPH的表达来调控叶片衰老。我们发现NMR19-4的DNA甲基化状态是稳定遗传的,与遗传变异无关。另外,进一步分析表明,NMR19-4的DNA甲基化与局部气候相关,这意味着NMR19-4是与环境相关的表观遗传等位基因。总结起来,我们发现了一个新的表观遗传等位基因,并为其在适应局部气候方面的起源和潜在功能提供了机制性的见解。


Abstract:

Epigenetic variation has been proposed to facilitate adaptation to changing environments, but evidence that natural epialleles contribute to adaptive evolution has been lacking. Here we identify a retrotransposon, named “NMR19” (naturally occurring DNA methylation variation region 19), whose methylation and genomic location vary among Arabidopsis thaliana accessions. We classify NMR19 as NMR19-4 and NMR19-16 based on its location, and uncover NMR19-4 as an epiallele that controls leaf senescence by regulating the expression of PHEOPHYTIN PHEOPHORBIDE HYDROLASE (PPH). We find that the DNA methylation status of NMR19-4 is stably inherited and independent of genetic variation. In addition, further analysis indicates that DNA methylation of NMR19-4 correlates with local climates, implying that NMR19-4 is an environmentally associated epiallele. In summary, we discover a novel epiallele, and provide mechanistic insights into its origin and potential function in local climate adaptation.


Fig. 6 NMR19-4m controls leaf senescence






https://blog.sciencenet.cn/blog-634883-1098056.html

上一篇:PLoS Genet∣RNA结合蛋白HOS5参与前体mRNA剪接的机制研究
下一篇:Developmental Cell∣中科院刘宏涛研究组揭示了UV-B与BR信号...
收藏 IP: 114.251.216.*| 热度|

0

该博文允许注册用户评论 请点击登录 评论 (0 个评论)

数据加载中...
扫一扫,分享此博文

Archiver|手机版|科学网 ( 京ICP备07017567号-12 )

GMT+8, 2024-3-29 02:24

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部