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Coinfection accelerates transmission to new hosts despite no effects on virulen...
Godinho, Diogo; Rodrigues, Leonor R; Lefèvre, Sophie; Magalhães, Sara; Duncan, Alison B.One of the fundamental aims of ecological, epidemiological and evolutionary studies of host–parasite interactions is to unravel which factors affect parasite virulence. Theory predicts that virulence and transmission are correlated by a trade-off, as too much virulence is expected to hamper transmission owing to excessive host damage. Coinfections may affect each of these traits and/or their correlation. Here, ...
Limited host availability disrupts the genetic correlation between virulence an...
Godinho, Diogo; Rodrigues, Leonor R; Lefevre, Sophie; Delteil, Laurane; Mira, André; De mendonça fragata almeida, Inês; Magalhães, sara; Duncan, AlisonVirulence is expected to be linked to parasite fitness via transmission. However, it is not clear whether this relationship is genetically determined, nor if it differs when transmission occurs continuously during, or only at the end of, the infection period. Here, we used inbred lines of the macroparasitic spider mite Tetranychus urticae to disentangle genetic vs. nongenetic correlations among traits, while va...
Intraspecific variability in herbivore response to elemental defences is caused...
Godinho, Diogo; Branquinho, Cristina; Magalhães, saraSome plants are able to accumulate on their leaves metals taken from the soil, using this as a defence against herbivorous arthropods. However, herbivore response to metal accumulation in plants is known to be variable. While some species and taxonomic groups are less affected than others, hormetic effects have also been observed in spider mites, herbivorous crop pests. Still, knowledge on the range and causes ...
Concurrent herbivory and metal accumulation: The outcome for plants and herbivores
Godinho, Diogo; Serrano, Helena Cristina; Magalhães, sara; Branquinho, CristinaThe effects of metals on plants and herbivores, as well as the interaction among the latter, are well documented. However, the effects of simultaneous herbivory and metal accumulation remain poorly studied. Here, we shed light on this topic by infesting cadmium-accumulating tomato plants (Solanum lycopersicum), either exposed to cadmium or not, with herbivorous spider mites, Tetranychus urticae or T. evansi dur...
The distribution of herbivores between leaves matches their performance only in...
Godinho, Diogo; Janssen, Arne; Li, Dan; Cruz, Cristina; Magalhaes, SFew studies have tested how plant quality and the presence of competitors interact in determining how herbivores choose between different leaves within a plant. We investigated this in two herbivorous spider mites sharing tomato plants: Tetranychus urticae, which generally induces plant defenses, and Tetranychus evansi, which suppresses them, creating asymmetrical effects on coinfesting competitors. On uninfest...
Creating outbred and inbred populations in haplodiploids to measure adaptive re...
Godinho, Diogo; Cruz, Miguel A.; Charlery de la Masselière, Maud; Teodoro‐Paulo, Jéssica; Eira, Cátia; De mendonça fragata almeida, InêsLaboratory studies are often criticized for not being representative of processes occurring in natural populations. One reason for this is the fact that laboratory populations generally do not capture enough of the genetic variation of natural populations. This can be mitigated by mixing the genetic background of several field populations when creating laboratory populations. From these outbred populations, it ...
The distribution and performance of two herbivorous spider-mites living in hete...
Godinho, DiogoA qualidade das plantas para os herbívoros depende de características da planta (e.g. nutrientes e defesas), de fatores abióticos (e.g. metais) e da presença de outros herbívoros e antagonistas na planta. O intuito desta tese foi caracterizar o efeito de diferentes qualidades da planta nas interações planta-herbívoro e herbívoro-herbívoro nos ácaros-aranha, Tetranychus urticae e T.evansi. Primeiro descrevemos a...