INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Inter-regional variation on leaf surface defenses in native and non-native Centaurea solstitialis plants
Autor/es:
SOTES, G. J.; CAVIERES, L. A. ; MONTESINOS, D. ; PEREIRA COUTINHO, A. X. ; PELÁEZ, W. J.; LOPES, S. M. M. ; PINHO E MELO, T.M.V.D.
Revista:
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2015 vol. 62 p. 208 - 218
ISSN:
0305-1978
Resumen:
Plant chemical defenses can be qualitative (toxins) to face generalist herbivores andquantitative (digestibility reducers) to specialists. Trichomes can produce chemicals, butalso acts as a quantitative defense and in water loss. The shifting defense hypothesis (SDH)poses that invasive plants reduce the production of qualitative defenses against specialistherbivores because those are frequently absent in invaded regions, while increasing defensesagainst generalist herbivores. Chemical and physical leaf surface defensive traitscould give information about direct planteherbivore interaction in native and non-nativeregions. We studied leaf surface morphology and epicuticular chemistry of the invasive C.solstitialis in plants from native and non-native regions. Across regions, the main chemicalcomponents were sesquiterpene lactones, similar densities of sessile glandular trichomesand a variable number of large multicellular trichomes. Exotic plants face different sets ofchallenges in the new regions. In accordance with SDH, plants from non-native regionspresented higher total sesquiterpene lactones concentrations (qualitative defense).Trichome density was possibly associated to differences in local climatic conditions.Sesquiterpene lactones are likely to play an important role on the invasion success ofCentaurea. Leaf surface components provide meaningful information that should beconsider in future studies to unravel the mechanisms involved in plant invasions.