Phylogenetic signal in plant pathogen-host range
Phylogenetic signal in plant pathogen-host range
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DOI：
10.1073/pnas.0607968104
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发表时间：
2007-03-20
影响因子：
11.1
通讯作者：
Webb, Campbell O.
中科院分区：
文献类型：
--
作者：
Gilbert, Gregory S.;Webb, Campbell O.
是什么决定了哪些植物物种对给定的植物病原体敏感，人们对此知之甚少。用热带雨林植物叶片接种真菌病原菌的实验表明，大多数真菌病原菌是多食性的，但当地群落中的大多数植物物种对任何给定的病原菌都具有抗性。一种病原体侵染两种植物的可能性随着植物之间的系统发育距离而不断降低，甚至到了古老的进化距离也是如此。这种寄主范围内的系统发育信号使我们能够预测当地群落中植物病原体的可能寄主范围，为植物生态学、农艺系统设计、国际贸易中的检疫法规和生防剂的风险分析提供了重要的工具。特别是，研究结果表明，一种疾病通过自然植物群落的传播速度和生态影响将在很大程度上取决于该群落本身的系统发育结构，而目前的监管方法严重低估了植物病原体或其宿主全球移动的局部风险。
What determines which plant species are susceptible to a given plant pathogen is poorly understood. Experimental inoculations with fungal pathogens of plant leaves in a tropical rain forest show that most fungal pathogens are polyphagous but that most plant species in a local community are resistant to any given pathogen. The likelihood that a pathogen can infect two plant species decreases continuously with phylogenetic distance between the plants, even to ancient evolutionary distances. This phylogenetic signal in host range allows us to predict the likely host range of plant pathogens in a local community, providing an important tool for plant ecology, design of agronomic systems, quarantine regulations in international trade, and risk analysis of biological control agents. In particular, the results suggest that the rate of spread and ecological impacts of a disease through a natural plant community will depend strongly on the phylogenetic structure of the community itself and that current regulatory approaches strongly underestimate the local risks of global movement of plant pathogens or their hosts.