PLANT MITOCHONDRIAL-DNA EVOLVES RAPIDLY IN STRUCTURE, BUT SLOWLY IN SEQUENCE
PLANT MITOCHONDRIAL-DNA EVOLVES RAPIDLY IN STRUCTURE, BUT SLOWLY IN SEQUENCE
复制标题
DOI：
10.1007/bf02143500
复制
发表时间：
1988-01-01
影响因子：
3.9
通讯作者：
HERBON, LA
中科院分区：
文献类型：
--
作者：
PALMER, JD;HERBON, LA
研究了芸苔属（Brassica）和萝卜属（Raphanus）6种十字花科植物线粒体DNA（mtDNA）的进化克里思和模式。这六个mtDNA经历了多次内部重组，因此在亚基因组环状染色体的大小方面存在显着差异。必须假设3到14个倒位来解释任何两个物种之间的结构差异。相比之下，这些线粒体DNA的一级序列极其相似，每1000个碱基对中只有1-8个不同。这些植物mtDNA的点突变率大约比陆地植物叶绿体DNA（cpDNA）慢4倍，比氨基酸mtDNA慢100倍。相反，植物线粒体DNA的重排速率比cpDNA和amphiomtDNA快得多。
We examined the tempo and mode of mitochondrial DNA (mtDNA) evolution in six species of crucifers from two genera, Brassica and Raphanus. The six mtDNAs have undergone numerous internal rearrangments and therefore differ dramatically with respect to the sizes of their subgenomic circular chromosomes. Between 3 and 14 inversions must be postulated to account for the structural differences found between any two species. In contrast, these mtDNAs are extremely similar in primary sequence, differing at only 1-8 out of every 1000 bp. The point mutation rate is these plant mtDNAs is roughly 4 times slower than in land plant chloroplast DNA (cpDNA) and 100 times slower than in aminal mtDNA. Conversely, the rate of rearrangements is extraordinarily faster in plant mtDNA than in cpDNA and amimal mtDNA.