Host-to-parasite gene transfer in flowering plants: Phylogenetic evidence from malpighiales
Host-to-parasite gene transfer in flowering plants: Phylogenetic evidence from malpighiales
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DOI：
10.1126/science.1100671
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发表时间：
2004-07-30
期刊：
影响因子：
56.9
通讯作者：
Wurdack, KJ
中科院分区：
文献类型：
--
作者：
Davis, CC;Wurdack, KJ
高等植物有性无关物种之间的水平基因转移（HGT）最近已被证实，但HGT的机制解释仍然是推测性的。我们表明，寄生的关系可能有助于开花植物之间的HGT。内生寄生物Rafflesiaceae被置于不同的目的Malpighiales。我们的多基因系统发育分析显示，线粒体（matR）和核位点（18 S核糖体DNA和PHYC）的地方，在Malpighiales，也许Ochnaceae/Clusiaceae的Rafflesiaceae。线粒体nad 1B-C，然而，集团内的葡萄科，靠近其专性宿主崖爬藤属。这些不一致的系统发育假说强烈表明，莱佛士科的部分线粒体基因组是通过HGT从其宿主获得的。
Horizontal gene transfer (HGT) between sexually unrelated species has recently been documented for higher plants, but mechanistic explanations for HGTs have remained speculative. We show that a parasitic relationship may facilitate HGT between flowering plants. The endophytic parasites Rafflesiaceae are placed in the diverse order Malpighiales. Our multigene phylogenetic analyses of Malpighiales show that mitochrodrial ( matR) and nuclear loci (18S ribosomal DNA and PHYC) place Rafflesiaceae in Malpighiales, perhaps near Ochnaceae/Clusiaceae. Mitochondrial nad1B-C, however, groups them within Vitaceae, near their obligate host Tetrastigma. These discordant phylogenetic hypotheses strongly suggest that part of the mitochondrial genome in Rafflesiaceae was acquired via HGT from their hosts.