The geographical and seasonal mosaic in a plant-herbivore interaction: patterns of defences and herbivory by a specialist and a non-specialist

Autor(es)

Vercosa, Diomar ^{[1, 2]} ; Cogni, Rodrigo ^[3] ; Alves, Marcos Nopper ^[4] ; Trigo, Jose Roberto ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, UNICAMP, Inst Biol, Lab Chem Ecol, Dept Anim Biol, BR-13083862 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, UNICAMP, Inst Biol, Postgrad Program Plant Biol, Campinas, SP - Brazil

^[3] Univ Sao Paulo, Dept Ecol, BR-05508900 Sao Paulo - Brazil

^[4] Univ Estadual Campinas, Dept Agrotechnol, Lab Plant Tissue Culture, Ctr Biol & Agr Chem, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 9, OCT 23 2019.
• Citações Web of Science: 0

Resumo

In order to evaluate the geographic mosaic theory of coevolution, it is crucial to investigate geographical variation on the outcome of ecological interactions and the functional traits which dictate these outcomes. Plant populations are attacked by specialist and non-specialist herbivores and may have different types of chemical and biotic defences. We investigated geographical and seasonal variation in the interaction between the plant Crotalaria pallida and its two major herbivores (the specialist Utetheisa ornatrix and the non-specialist Etiella zinckenella). We first showed that attack by the two herbivores and a chemical and a biotic defence vary greatly in time and space. Second, we performed a common garden experiment that revealed genetic variation among populations in herbivore resistance and a chemical defence, but no genetic variation in a biotic defence. Third, we sampled 20 populations on a much larger geographical scale and showed great variation in attack rates by the two herbivores and a chemical defence. Finally, we showed that herbivory is not correlated with a chemical defence in the 20 field populations. Our study shows that to understand the evolution of ecological interactions it is crucial to investigate how the outcome of the interaction and the important species traits vary geographically and seasonally. (AU)

• Processo FAPESP: 11/17708-0 - Defesas químicas em plantas e insetos neotropicais
• Beneficiário: Jose Roberto Trigo
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/25991-0 - Ecologia genômica de insetos: adaptações ao clima e evolução de interações ecológicas
• Beneficiário: Rodrigo Cogni
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores