Evidence for horizontal transfer of mitochondrial DNA to the plastid genome in a bamboo genus.
Evidence for horizontal transfer of mitochondrial DNA to the plastid genome in a bamboo genus.
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竹属线粒体 DNA 水平转移至质体基因组的证据
DOI：
10.1038/srep11608
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发表时间：
2015-06-23
影响因子：
4.6
通讯作者：
Li DZ
中科院分区：
文献类型：
--
作者：
Ma PF;Zhang YX;Guo ZH;Li DZ
在有花植物中，三种基因组（核、线粒体和质体）共存，DNA在细胞内的水平转移非常普遍，尤其是从质体到线粒体基因组的水平转移。然而，质体基因组在进化中通常是保守的，长期以来一直被认为对外来DNA具有免疫力。最近，在两个真双子叶植物谱系中报道了从线粒体到质体基因组的相反方向的DNA转移。本文对6种竹类植物的质体基因组进行了测序，其中3种为新热带木本竹类，3种为草本竹类。发现了几个不寻常的特征，包括重复的trnT-GGU和一个拷贝的rps 19由于收缩的反向重复序列（IRs）。最有趣的是在三种草本竹的质体IR区域中的~ 2.7kb插入。此外，插入被记录为从线粒体水平转移到质体基因组。我们的研究提供了单子叶植物质体DNA转移的证据，再次证明这种罕见的事件确实发生在其他被子植物谱系。然而，这种转移的机制仍然不清楚，将来可能会在其他植物中进行更多的研究来阐明它。
In flowering plants, three genomes (nuclear, mitochondrial and plastid) coexist and intracellular horizontal transfer of DNA is prevalent, especially from the plastid to the mitochondrion genome. However, the plastid genomes are generally conserved in evolution and have long been considered immune to foreign DNA. Recently, the opposite direction of DNA transfer from the mitochondrial to the plastid genome has been reported in two eudicot lineages. Here we sequenced 6 plastid genomes of bamboos, three of which are neotropical woody species and three are herbaceous ones. Several unusual features were found, including the duplication oftrnT-GGUand loss of one copy ofrps19due to contraction of inverted repeats (IRs). The most intriguing was the ~2.7 kb insertion in the plastid IR regions in the three herbaceous bamboos. Furthermore, the insertion was documented to be horizontally transferred from the mitochondrial to the plastid genome. Our study provided evidence of the mitochondrial-to-plastid DNA transfer in the monocots, demonstrating again that this rare event does occur in other angiosperm lineages. However, the mechanism underlying the transfer remains obscure and more studies in other plants may elucidate it in the future.
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影响因子：
3.3
作者：
Smith DR
通讯作者：
Smith DR
影响因子：
5.8
作者：
Mayor, C;Brudno, M;Dubchak, I
通讯作者：
Dubchak, I
影响因子：
10.7
作者：
Goremykin, Vadim V.;Salamini, Francesco;Viola, Roberto
通讯作者：
Viola, Roberto
影响因子：
7
作者：
Li, Ruiqiang;Zhu, Hongmei;Wang, Jun
通讯作者：
Wang, Jun
DOI：
10.1073/pnas.1413272111
发表时间：
2014-11-11
影响因子：
11.1
作者：
Oren, Yaara;Smith, Mark B.;Pupko, Tal
通讯作者：
Pupko, Tal