Leaf trait variation on Erythroxylum tortuosum (Erythroxylaceae) and its relationship with oviposition preference and stress by a host-specific leaf miner

Leaf trait variation on Erythroxylum tortuosum (Erythroxylaceae) and its relationship with oviposition preference and stress by a host-specific leaf miner

Author Ishino, Marcos N. Google Scholar
De Sibio, Paula R. Google Scholar
Rossi, Marcelo N. Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Abstract It has been suggested that plant physical and chemical traits vary considerably in space and time. Hence, leaf-mining insects may adjust their oviposition in response to leaf attributes representing high quality. Moreover, herbivorous insects can modify leaf morphology by acting as stressors, increasing, for example, fluctuating asymmetry (FA) levels. Here, we investigate oviposition preference in Agnippe sp.2, a leaf-mining moth of Erythroxylum tortuosum, in relation to differences in leaf nutritional quality (i.e. levels of water, nitrogen and tannin content), leaf area (i.e. quantity of resource hypothesis) and FA. We also verify whether temporal variation in plant nutritional quality emerges as an alternative hypothesis to explain oviposition distribution in time, and whether this leaf miner is a stress-causing agent, increasing FA during larval development. Mined leaves and leaves with and without eggs were periodically collected from plants located in a Cerrado fragment in Brazil. in the laboratory, leaf traits were assessed (using image analysis software) and quantified (biochemical analysis) according to the aims previously determined. Oviposition probability did not change in relation to variations in nitrogen, tannins and FA of leaves. However, leaf-miner females preferred to oviposit on leaves having large areas and low water contents. It was also verified that new leaves of E. tortuosum, which carried most leaf-miner eggs, presented significantly lower tannins and greater levels of nitrogen and water than old leaves. the oviposition choice exhibited by leaf miners was found to be non-random because they appear to use resource quantity and water content as cues as where to lay their eggs. the temporal variation of plant nutritional quality is likely to influence the time of leaf-miner oviposition; and leaf FA was not increased during larval feeding, suggesting that these herbivores do not cause variations in FA levels.
Keywords Erythroxylaceae
insect-plant interaction
oviposition preference
physical and chemical leaf trait
stress
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Grant number FAPESP: 05/52569-0
Date 2011-04-01
Published in Austral Ecology. Malden: Wiley-Blackwell, v. 36, n. 2, p. 203-211, 2011.
ISSN 1442-9985 (Sherpa/Romeo, impact factor)
Publisher Wiley-Blackwell
Extent 203-211
Origin http://dx.doi.org/10.1111/j.1442-9993.2010.02139.x
Access rights Closed access
Type Article
Web of Science ID WOS:000288867500010
URI http://repositorio.unifesp.br/handle/11600/33619

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