Seasonality and the evolutionary divergence of plant parasites

Ecology
Frédéric M HamelinLudovic Mailleret

Abstract

The coexistence of closely related plant parasites is widespread. Yet, understanding the ecological determinants of evolutionary divergence in plant parasites remains an issue. Niche differentiation through resource specialization has been widely researched, but it hardly explains the coexistence of parasites exploiting the same host plant. Time-partitioning has so far received less attention, although in temperate climates, parasites may specialize on either the early or the late season. Accordingly, we investigated whether seasonality can also promote phenotypic divergence. For plant parasites, seasonality generally engenders periodic host absence. To account for abrupt seasonal events, we made use of an epidemic model that combines continuous and discrete dynamics. Based on the assumption of a trade-off between in-season transmission and inter-season survival, we found through an "evolutionary invasion analysis" that evolutionary divergence of the parasite phenotype can occur. Since such a trade-off has been reported, this study provides further ecological bases for the coexistence of closely related plant parasites. Moreover, this study provides original insights into the coexistence of sibling plant pathogens which perform...Continue Reading

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Citations

Feb 14, 2014·Journal of the Royal Society, Interface·Guilhem Rascalou, Sébastien Gourbière
Apr 5, 2013·Global Change Biology·Sukumar Chakraborty
Jan 21, 2012·The New Phytologist·Frédéric FabreBenoit Moury
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Dec 9, 2014·Parasitology·Magdalena Zarowiecki, Matt Berriman
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Feb 11, 2020·Frontiers in Plant Science·Christophe Le MayVirginie Ravigné
Jan 14, 2020·Journal of Theoretical Biology·F M HilkerF M Hamelin
Feb 25, 2020·Mathematical Biosciences·Israël Tankam-ChedjouFrédéric Grognard

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