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Separation of earlyand late responses toherbivory inArabidopsis bychanging plasmodesmalfunction Irene BricchiAndrea OcchipintiCinzia M. Bertea2012 год

Separation of early and late responses to herbivory in Arabidopsis by changing plasmodesmal function
статья из журнала

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Аннотация: Herbivory results in an array of physiological changes in the host that are separable from the associated physical damage. We have made the surprising observation that an Arabidopsis line (pdko3) mutated in genes encoding plasmodesmal proteins is defective in some, but not all, of the typical plant responses to herbivory. We tested the responses of plasma transmembrane potential (Vm) depolarization, voltage gated K(+) channel activity, cytosolic calcium [Ca2+]cyt and reactive oxygen species (ROS) (H2 O2 and NO) release, shoot-to-root signaling, biosynthesis of the phytohormone jasmonic acid (JA) and the elicitation of volatile organic compounds (VOCs). Following herbivory and the release of factors present in insect oral secretions (including a putative β-galactofuranose polysaccharide), both the pdko3 and wild type (WT) plants showed a increased accumulation of [Ca2+]cyt , NO and H2 O2 . In contrast, unlike WT plants, the mutant line showed an almost complete loss of voltage gated K(+) channel activity and Vm depolarization, a loss of shoot-induced root-Vm depolarization, a loss of activation and regulation of gene expression of the JA defense pathway, and a much diminished release and altered profile of VOCs. The mutations in genes for plasmodesmal proteins have provided valuable genetic tools for the dissection of the complex spectrum of responses to herbivory and shown us that the responses to herbivory can be separated into a calcium-activated oxidative response and a K(+) -dependent Vm-activated jasmonate response associated with the release of VOCs.
Год издания: 2012
Авторы: Irene Bricchi, Andrea Occhipinti, Cinzia M. Bertea, Simon Zebelo, Carla Brillada, Francesca Verrillo, Cristina De Castro, Antonio Molinaro, Christine Faulkner, Andrew J. Maule, Massimo E. Maffei
Издательство: Wiley
Источник: The Plant Journal
Ключевые слова: Plant Parasitism and Resistance, Insect-Plant Interactions and Control, Plant Stress Responses and Tolerance
Другие ссылки: The Plant Journal (PDF)
The Plant Journal (HTML)
Institutional Research Information System University of Turin (University of Turin) (PDF)
Institutional Research Information System University of Turin (University of Turin) (HTML)
PubMed (HTML)