摘要
DNA甲基化在调节基因表达和控制细胞分化过程中扮演着重要的角色,其作为表观遗传修饰形式之一,已成为后基因组时代的研究热点。本文采用检测基因组CpG位点甲基化水平的MSAP技术(Methylation—Sensitive Amplification Polymorphism),对海带配子体与孢子体世代进行研究,研究发现:孢子体世代甲基化水平(25.64%)显著高于配子体世代(♂5.50%和♀4.48%);低温处理能引起DNA甲基化位点及比率的变化,直接反映在配子体克隆同步发育率的显著提高;对于海带孢子体世代不同组织部位甲基化程度的检测表明,同一株海带不同组织部位的甲基化程度不同(21.79%~29.49%),其中以Ⅳ型为主,同一组织部位在不同个体中甲基化程度也存在差异。研究为进一步从表观遗传学角度探讨海带不同倍型的发育机制和配子体对低温的应答机制奠定基础。
DNA methylation is one of the major epigenetic modifications, which plays an important role in regulating gene expression. Upon the coming of post-genomics era, DNA methylation anapysis has become a research hotspot. In this study, MSAP (Methylation-Sensitive Amplification Polymorphism) analysis was conducted to test the methylation level of sporophyte and gametophyte clones. We found that. 1) the methylation level of sporophyte (25.64%) was significantly higher than that of gametophyte clones (5.50% in the male and 4, 48% in the female) ; 2) chilling treatment caused the change in methylation sites as well as methylation rates, as was supported by the increase of developmental rate of gametophyte clones; and 3) methylation level varied among the individuals and the tissues (21.79%-29.49%) of S. japonica sporophyte. Our findings may aid to further exploration of the nature of different ploidy generations and the response to chilling treatment of S. japonica.
出处
《中国海洋大学学报(自然科学版)》
CAS
CSCD
北大核心
2013年第10期54-59,共6页
Periodical of Ocean University of China
基金
高校基本科研业务费项目(201262003)
国家高技术研究发展计划项目(2012AA10A406)资助
关键词
海带
配子体克隆
发育
MSAP
低温处理
Saccharina japonica
gametophyte clone
development
methylation-sensitive amplification polymorphism
chilling treatment