高等植物线粒体内Sublimon的研究现状  

Sublimon in Higher Plant Mitochondria

作　　者：易平[1] 刘义[1] 朱英国[2] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072 [2]武汉大学生命科学学院植物发育生物学教育部重点实验室,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2003年第6期775-777,共3页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(3070568)

摘　　要：高等植物线粒体中由重复序列介导的DNA分子内或分子间的重组频繁发生,产生了具有不同拷贝数或不同化学计量级(stoichiometrics)的DNA分子,其中一类分子以极低的化学计量级水平存在,被称为Sublimon.Sublimon是线粒体内潜在的遗传信息,是线粒体基因组丰富遗传多样性产生的机制之一.本文就Sublimon的研究现状进行了概述.The mitochondrial genomes of higher plants are much larger and more complex than those of other eukaryotic organisms. The typical characteristics of higher plants mitochondrial genome are multicircular molecules and extensive repeats. The presence of recombinationally active repeated sequences brings out a DNA colony with different copies or stoichiometrics generated by both intermolecular and intermolecular recombination events. One type among them is called sublimon due to its extraordinarily low copy. As potentially genetic information in mitochondria,sublimon is regarded as one reason for the abundant existence of inherited diversity of mitochondrial genome. In this paper, research situation of sublimon are summarized.

关 键 词：线粒体 化学计量级 Sublimon 高等植物 DNA分子 遗传多样性 基因组 育种 

分 类 号：S334[农业科学—作物遗传育种] Q78[农业科学—农艺学]