High levels of auto-infection in plant pathogens favour short latent periods: a theoretical approach
High levels of auto-infection in plant pathogens favour short latent periods: a theoretical approach
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植物病原体的高水平自体感染有利于短潜伏期:一种理论方法
DOI:
10.1007/s10682-012-9602-2
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发表时间:
2012
影响因子:
1.9
通讯作者:
Van Den Berg F
中科院分区:
文献类型:
--
作者:
Van Den Berg F
Auto-infection (infection arising from inoculum produced on the same host unit) is common in polycyclic plant pathogens, but often neglected in experimental and theoretical studies, which focus instead on infection of new hosts (allo-infection). Here we test the hypothesis that high auto-infection, as observed for leaf infecting fungal pathogens, could select for short latent periods. An individual-based simulation model keeps track of lesions, resulting from the spread of spores, between and within individual leaves. Linked to a trade-off between latent period and spore production capacity, as observed forPuccinia triticinaon wheat, the adaptation of the latent period is analysed for different levels of auto-infection using the methods of pairwise invasibility plots. Results suggest that increased auto-infection selects for reduced latent periods. A reduction in leaf longevity also selects for reduced latent periods, which is most obvious for a relatively low ratio of auto- to allo-infection. This study is the first to consider the effect of auto-infection on the evolution of pathogen life history traits. The fact that auto-infection could drastically reduce pathogen latent periods highlights the need for more research in this area.
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