Counter-intuitive developmental plasticity induced by host quality

Proceedings. Biological Sciences
Gregory RöderRussell E Naisbit

Abstract

Adaptation to different hosts plays a central role in the evolution of specialization and speciation in phytophagous insects and parasites, and our ability to experimentally rank hosts by their quality is critical to research to understand these processes. Here we provide a counter-intuitive example in which growth is faster on poor quality hosts. The leaf beetles Oreina elongata and Oreina cacaliae share their host plant with the rust Uromyces cacaliae. Larvae reared on infected Adenostyles alliariae show reduced growth rate, reduced maximum weight and longer development time. However, they normally respond adaptively to the rust's mid-season arrival. When switched during development from healthy to infected leaves, larvae accelerate growth and reduce development time, but pupate at lower body weight. In this novel plant-insect-fungus interaction, infection forms the cue to trade off life-history traits in order to complete development within the brief alpine summer. It represents a novel mode of developmental plasticity, which is likely to be found in other host-parasite systems whenever host quality deteriorates due to multiple infection or ageing. This phenotypic plasticity would modify competition after co-infection and th...Continue Reading

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Citations

Dec 18, 2009·Biological Reviews of the Cambridge Philosophical Society·Steven L Chown, Kevin J Gaston
Mar 8, 2013·Ecology and Evolution·Camille TurlureGert-Jan Duinen
Sep 3, 2010·Molecular Phylogenetics and Evolution·Matthias BorerRussell E Naisbit
Nov 24, 2016·Ecology and Evolution·Amy C MoreyW D Hutchison
Feb 7, 2021·Trends in Ecology & Evolution·Patrick W KellyKarin S Pfennig

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