Calcium and secondary CPK signaling in plants in response to herbivore attack |
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Authors: | Gen-ichiro Arimura Massimo E Maffei |
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Institution: | a Global COE Program: Evolution and Biodiversity, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan b Center for Ecological Research, Kyoto University, Otsu 520-2113, Japan c Plant Physiology Unit, Department of Plant Biology and Innovation Centre, University of Turin, 10135 Turin, Italy |
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Abstract: | Plant Ca2+ signals are involved in a sizable array of intracellular signaling pathways after pest invasion. Upon herbivore feeding there is a dramatic Ca2+ influx, followed by the activation of Ca2+-dependent signal transduction pathways that include interacting downstream networks of kinases for defense responses. Notably, Ca2+-binding sensory proteins such as Ca2+-dependent protein kinases (CPKs) have recently been documented to mediate the signaling following Ca2+ influx after herbivory, in phytohormone-independent manners. Here, we review the sequence of signal transductions triggered by herbivory-evoked Ca2+ signaling leading to CPK actions for defense responses, and discuss in a comparative way the involvement of CPKs in the signal transduction of a variety of other biotic and abiotic stresses. |
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Keywords: | Calcium signaling Ca2+-dependent protein kinase (CPK) Herbivory Plant defense response |
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