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首页> 外文期刊>Trends in Plant Science >A molecular evolutionary concept connecting nonhost resistance, pathogen host range, and pathogen speciation
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A molecular evolutionary concept connecting nonhost resistance, pathogen host range, and pathogen speciation

机译：连接非宿主抗性，病原体宿主范围和病原体物种形成的分子进化概念

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摘要

Any given pathogenic microbial species typically colonizes a limited number of plant species. Plant species outside of this host range mount nonhost disease resistance to attempted colonization by the, in this case, non-adapted pathogen. The underlying mechanism of nonhost immunity and host immunity involves the same non-self detection systems, the combined action of nucleotide-binding and leucine-rich repeat (NB-LRR) proteins and pattern recognition receptors (PRRs). Here we hypothesize that the relative contribution of NB-LRR and PRR-triggered immunity to nonhost resistance changes as a function of phylogenetic divergence time between host and nonhost. Similarly, changes in pathogen host range, e.g. host range expansions, appear to be driven by variation in pathogen effector repertoires, in turn leading to reproductive isolation and subsequent pathogen speciation.
机译：任何给定的病原微生物物种通常会在有限数量的植物物种中定殖。在此宿主范围之外的植物物种对非宿主病原体的非定植病原体产生了抗宿主病抗性。非宿主免疫和宿主免疫的潜在机制涉及相同的非自我检测系统，核苷酸结合和富含亮氨酸的重复序列（NB-LRR）蛋白以及模式识别受体（PRR）的联合作用。在这里我们假设NB-LRR和PRR触发的免疫对非宿主抗性的相对贡献随宿主和非宿主之间系统发生差异的时间而变化。类似地，病原体宿主范围的变化例如宿主范围的扩展似乎是由病原体效应子库的变化所驱动，进而导致生殖隔离和随后的病原体形成。

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