Signatures of adaptation to plant parasitism in nematode genomes.
Signatures of adaptation to plant parasitism in nematode genomes.
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DOI：
10.1017/s0031182013002163
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发表时间：
2015-02
期刊：
影响因子：
2.4
通讯作者：
Danchin EG
中科院分区：
文献类型：
--
作者：
Bird DM;Jones JT;Opperman CH;Kikuchi T;Danchin EG
植物寄生线虫对全球农业造成相当大的损害。寄生植物的能力是一个衍生的特点，似乎已经独立出现了几次在线虫门。已经观察到摄食方式的形态趋同，但这是否是由分子趋同引起的还不太明显。为了解决这个问题，我们评估基因组签名是否可以与线虫的植物寄生。在这篇综述中，我们报告的基因组特征和特点，似乎是常见的植物寄生线虫，而缺席或罕见的动物寄生虫，捕食者或自由生活的物种。候选人的寄生基因的水平收购已被系统地发现在所有的植物寄生物种调查在序列水平。模拟植物激素的肽的存在似乎也是植物寄生物种的特征。迄今为止，对植物寄生线虫的几个基因组的注释揭示了一组明显的物种特异性基因。在这些种特异性基因中经常发现对寄生作用重要的效应基因，这表明重叠性很差。总的来说，线虫似乎已经开发出收敛的基因组解决方案，以适应植物寄生。
Plant-parasitic nematodes cause considerable damage to global agriculture. The ability to parasitize plants is a derived character that appears to have independently emerged several times in the phylum Nematoda. Morphological convergence to feeding style has been observed, but whether this is emergent from molecular convergence is less obvious. To address this, we assess whether genomic signatures can be associated with plant parasitism by nematodes. In this review, we report genomic features and characteristics that appear to be common in plant-parasitic nematodes while absent or rare in animal parasites, predators or free-living species. Candidate horizontal acquisitions of parasitism genes have systematically been found in all plant-parasitic species investigated at the sequence level. Presence of peptides that mimic plant hormones also appears to be a trait of plant-parasitic species. Annotations of the few genomes of plant-parasitic nematodes available to date have revealed a set of apparently species-specific genes on every occasion. Effector genes, important for parasitism are frequently found among those species-specific genes, indicating poor overlap. Overall, nematodes appear to have developed convergent genomic solutions to adapt to plant parasitism.