摘要
为了解种群内水平上影响植物的适应机制与空间格局关系的因素,对鼎湖山2个演替阶段林分锥(Castanopsis chinensis)种群通过DNA甲基敏感扩增片段多态性进行表观遗传特征分析,结果表明,微生境对表观遗传变异的贡献由成熟林的20.2%降低为过熟林的15.7%,但地形因素的影响却增大,同时微生境中具体起显著作用的环境因素在两个林分也不同。因此,微生境特征对种群适应机制和分布格局有显著影响,对演替阶段也有影响。
In order to understand the effect factors on the relationship between plant adaptation mechanism and spatial pattern within population,epigenetic variation characteristics of two populations of Castanopsis chinensis at different succession stages in Dinghushan were analyzed by using DNA methyl-sensitive amplified fragment polymorphism(MSAP).The results showed that the contribution of microhabitats to epigenetic variation decreased from 20.2%in mature forests to 15.7%in over-mature forests,but the influence of topographic factors increased.At the same time,the environmental factors in microhabitats that played a significant role to methylation variation were different between the two forests.So,it was suggested that microhabitat characteristics had partial significant effects on population adaptation mechanism and distribution pattern,and did the succession stage.
作者
李文琪
姜楚
欧阳学军
林永标
练琚瑜
刘卫
LI Wen-qi;JIANG Chu;OUYANG Xue-jun;LIN Yong-biao;LIAN Jun-yu;LIU Wei(South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China;University of Chinese Academy of Sciences,Beijing 100049,China;Administration of Dinghushan National Nature Reserve,South China Botanical Garden,Chinese Academy of Sciences,Zhaoqing 526070,Guangdong,China;Guangdong Provincial Key Laboratory of Applied Botany,Guangzhou 510650,China)
出处
《热带亚热带植物学报》
CAS
CSCD
北大核心
2020年第1期62-69,共8页
Journal of Tropical and Subtropical Botany
基金
中国科学院战略性先导科技专项项目(B类)(XDB31030000)
国家重点研发计划项目(2017YFC0505802)
国家自然科学基金面上项目(31370437)资助~~
关键词
锥
表观遗传
DNA甲基化
鼎湖山
微环境
Castanopsis chinensis
Epigenetic
DNA methylation
Dinghushan
Microhabitat
