Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/17915
Título: Does leaf ontogeny lead to changes in defensive strategies againstinsect herbivores?
Autor: Queiroz, Antônio César Medeiros de
Costa, Fernanda Vieira da
Neves, Frederico Siqueira
Fagundes, Marcílio
Palavras-chave: Copaifera Langsdorffii
Formicidae
Hexapoda
Data do documento: 2013
Revista: Arthropod-Plant Interactions
É parte de: Volume 7, Número 1, Pags. 99-107
Abstract: Plants use different defense strategies throughout their ontogenetic development. In this study, three questions were proposed: (1) Is there a greater abundance of ants on young leaves, which possess active extrafloral nectaries, than on mature leaves? (2) Do ants exert an indirect defense that is effective against the attack of herbivorous insects? (3) Do mature leaves have a greater concentration of physical and chemical defense than young leaves? These questions were addressed through an antexclusion experiment in which two branches of Copaifera langsdorffii (n = 25) were marked and monitored throughout the entire foliar expansion and development period. A reduction in the abundance of ants throughout foliar development was observed. The ants exerted an effective defense against herbivores on C. langsdorffii: the branches where ants were excluded had a greater number of herbivores. The mature leaves possessed a greater index of leaf sclerophylly than young leaves, but the leaves did not differ in the concentration of tannins. The foliar ontogeny of C. langsdorffii promoted an inversion in the defense strategy against herbivores, and despite showing an opportunistic relationship, the interaction between ants and extrafloral nectaries appears to play an important role in structuring the interactions between herbivorous insects and their host plants. © Springer Science+Business Media B.V. 2012.
DOI: 10.1007/s11829-012-9224-1
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