【摘要】 本文列出了已发现的高等植物中的线粒体DNA质粒 ,按分子形状分为线粒体环状DNA质粒和线粒体线状DNA质粒 ,环状线粒体DNA质粒的特征是分子较小 ,序列中有正向 /反向重复序列 ,ORF一般较小。线状线粒体DNA质粒的特征是分子较大 ,末端有重复序列 ,5’端与蛋白质共价结合 ,有较长的ORF。还分别介绍了它们的复制机制、转录和起源。质粒间及质粒与核基因组、线粒体基因组、叶绿体基因组的同源性也作了介绍。最后 ,综述了植物线粒体DNA质粒与植物的细胞质雄性不育 (CMS)之间的关系更多还原

【Abstract】 This paper lists mitochondrial plasmid DNAs which have been found in higher plants and divides them into mitochondrial circular plasmid DNAs and mitochondrial linear plasmid DNAs. Mitochondrial circular plasmid DNAs are smaller . They usually contain direct and/or inverted repeats and smaller ORFs . Mitochondrial linear plasmid DNAs are larger, and they contain terminal inverted repeats ,proteins covalently bound at 5’ terminus,and longer ORFs. Replication, transcription and origin of the two kinds of mitochondrial plasmid DNAs are introduced respectively. The homology among plasmids and the homology between plasmids and nuclear genome ,mitochondrial genome ,chloroplast genome are also introduced. The relationship between plant mitochondrial plasmid DNAs and cytoplasmic male sterility (CMS) is discussed.更多还原