Similar local but different systemic metabolomic responses of closely related pine subspecies to folivory by caterpillars of the processionary moth
Rivas-Ubach, Albert (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Hódar, José Antonio (Universidad de Granada. Departamento de Biología Animal y Ecología)
Garcia-Porta, Joan (Institut de Biologia Evolutiva (UPF-CSIC) (Barcelona))
Guenther, Alex (University of California. Department of Earth System Science)
Oravec, Michal (Akademie věd České Republiky. Centrum výzkumu globální změny)
Urban, Otmar (Akademie věd České Republiky. Centrum výzkumu globální změny)
Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)

Date:	2016
Abstract:	Plants respond locally and systemically to herbivore attack. Most of the research conducted on plant-herbivore relationships at elemental and molecular levels have focused on the elemental composition or/and certain molecular compounds or specific families of defensive metabolites showing that herbivores tend to select plant individuals or species with higher nutrient concentrations and to avoid those with higher levels of defensive compounds. We performed stoichiometric and metabolomics, local and systemic, analyses in two subspecies of Pinus sylvestris under the attack by the caterpillars of the pine processionary moth, an important pest in the Mediterranean Basin. Both pine subspecies responded locally to folivory mainly by increasing the relative concentrations of terpenes and some phenolics. Systemic responses differed between subspecies and most of the metabolites presented intermediate concentrations between those of the affected parts and unattacked trees. Our results support the hypothesis that foliar nutrient concentrations are not a key factor of an alleged plant selection by adult female processionary moths for oviposition since folivory was not associated with any of the elements analyzed. Phenolic compounds did not generally increase in the attacked trees questioning thus their commonly proposed induction by folivory attack and their anti-feeding properties. Herbivory attack produced a general systemic shift in pines, including both primary and secondary metabolisms, that was less intense and chemically different from the local responses. Local pine responses were similar between subspecies while systemic responses were more distant between them.
Grants:	European Commission 610028 Ministerio de Economía y Competitividad GGL2013/48074-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-274
Note:	Altres ajuts: MAGRAMA/OAPN-022/2008
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Folivory ; Plant-insect ; Stoichiometry ; Metabolomics ; Phenolics ; Systemic responses
Published in:	Plant biology, Vol. 18, Issue 3, (May 2016) , p. 484-494, ISSN 1435-8603

DOI: 10.1111/plb.12422

Post-print 31 p, 1.1 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
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