Horizontal Gene Transfer by the Parasitic Plant Striga hermonthica
Horizontal Gene Transfer by the Parasitic Plant Striga hermonthica
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DOI：
10.1126/science.1187145
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发表时间：
2010-05-28
期刊：
影响因子：
56.9
通讯作者：
Shirasu, Ken
中科院分区：
文献类型：
--
作者：
Yoshida, Satoko;Maruyama, Shinichiro;Shirasu, Ken
水平基因转移被假定发生在作物与共生寄生植物之间，但缺乏经验证据。我们提出的证据表明，HGT事件移动到基因组的真双子叶植物寄生独脚金（Striga hermonthica），它感染了许多草种在非洲的核单子叶植物基因。表达序列标签分析表明，S. hermonthica含有一个在禾本科物种中广泛保守的核基因，但在其他真双子叶植物中没有发现。在系统发育学上，该基因与高粱基因（寄生杂草的单子叶宿主）聚类，表明核基因可以被自然界中的寄生杂草捕获。
Horizontal gene transfer has been postulated to occur between crops to co-occurring parasitic plants, but empirical evidence has been lacking. We present evidence that an HGT event moved a nuclear monocot gene into the genome of the eudicot parasite witchweed (Striga hermonthica), which infects many grass species in Africa. Analysis of expressed sequence tags revealed that the genome ofS. hermonthicacontains a nuclear gene that is widely conserved among grass species but is not found in other eudicots. Phylogenetically, this gene clusters with sorghum genes, the monocot host of the parasitic weed, suggesting that nuclear genes can be captured by parasitic weeds in nature.