Plant–herbivore interactions: Experimental demonstration of genetic variability in plant–plant signalling - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Evolutionary Applications Year : 2023

Plant–herbivore interactions: Experimental demonstration of genetic variability in plant–plant signalling

Abstract

Plant-herbivore interactions mediated by plant-plant signalling have been documented in different species but its within-species variability has hardly been quantified. Here, we tested if herbivore foraging activity on plants was influenced by a prior contact with a damaged plant and if the effect of such plant-plant signalling was variable across 113 natural genotypes of Arabidopsis thaliana. We filmed the activity of the generalist herbivore Cornu aspersum during 1 h on two plants differing only in a prior contact with a damaged plant or not. We recorded each snails' first choice, and measured its first duration on a plant, the proportion of time spent on both plants and leaf consumption. Overall, plant-plant signalling modified the foraging activity of herbivores in A. thaliana. On average, snails spent more time and consumed more of plants that experienced a prior contact with a damaged plant. However, the effects of plant-plant signalling on snail behaviour was variable: depending on genotype identity, plant-plant signalling made undamaged plants more repellant or attractive to snails. Genome-wide associations revealed that genes related to stress coping ability and jasmonate pathway were associated to this variation. Together, our findings highlight the adaptive significance of plant-plant signalling for plant-herbivore interactions.
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hal-04075254 , version 1 (20-04-2023)

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Aurélien Estarague, Cyrille Violle, Denis Vile, Anaïs Hany, Thibault Martino, et al.. Plant–herbivore interactions: Experimental demonstration of genetic variability in plant–plant signalling. Evolutionary Applications, 2023, 16 (4), pp.772-780. ⟨10.1111/eva.13531⟩. ⟨hal-04075254⟩
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