Defense of Scots pine against sawfly eggs (Diprion pini) is primed by exposure to sawfly sex pheromones
Bittner, Norbert (Freie Universität Berlin (Alemanya). Institute of Biology. Centre of Plant Sciences)
Hundacker, Janik (Freie Universität Berlin (Alemanya). Institute of Biology. Centre of Plant Sciences)
Achotegui-Castells, Ander (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Anderbrant, Olle (Lund University. Department of Biology (Sweden))
Hilker, Monika (Freie Universität Berlin (Alemanya). Institute of Biology. Centre of Plant Sciences)

Date:	2019
Abstract:	Plants respond to insect infestation with defenses targeting insect eggs on their leaves and the feeding insects. Upon perceiving cues indicating imminent herbivory, such as damage-induced leaf odors emitted by neighboring plants, they are able to prime their defenses against feeding insects. Yet it remains unknown whether plants can amplify their defenses against insect eggs by responding to cues indicating imminent egg deposition. Here, we tested the hypothesis that a plant strengthens its defenses against insect eggs by responding to insect sex pheromones. Our study shows that preexposure of Pinus sylvestris to pine sawfly sex pheromones reduces the surviva rate of subsequently laid sawfly eggs. Exposure to pheromones does not significantly affect the pine needle water content, but results in increased needle hydrogen peroxide concentrations and increased expression of defense-related pine genes such as SOD (superoxide dismutase), LOX (lipoxygenase), PAL (phenylalanine ammonia lyase), and PR-1 (pathogenesis related protein 1) after egg deposition. These results support our hypothesis that plant responses to sex pheromones emitted by an herbivorous insect can boost plant defensive responses to insect egg deposition thus highlighting the ability of a plant to mobilize its defenses very early against an initial phase of insect attack, the egg deposition.
Grants:	European Commission 610028
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, 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 publicada
Subject:	Priming ; Induced plant defense ; Insect oviposition ; Diprion pini ; Hydrogen peroxide
Published in:	Proceedings of the National Academy of Sciences of the United States of America, Vol. 116, Issue 49 (December 2019) , p. 24668-24675, ISSN 1091-6490

DOI: 10.1073/pnas.1910991116
PMID: 31748269

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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
Articles > Research articles
Articles > Published articles