Print Email Facebook Twitter Mitogen-activated protein kinase and abscisic acid signal transduction Title Mitogen-activated protein kinase and abscisic acid signal transduction Author Heimovaara-Dijkstra, S. Testerink, C. Wang, M. Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding Publication year 1998 Abstract The phytohormone abscisic acid (ABA) is a classical plant hormone, responsible for regulation of abscission, diverse aspects of plant and seed development, stress responses and germination. It was found that ABA signal transduction in plants can involve the activity of type 2C-phosphatases (PP2C), calcium, potassium, pH and a transient activation of MAP kinase. The ABA signal transduction cascades have been shown to be tissue-specific, the transient activation of MAP kinase has until now only been found in barley aleurone cells. However, type 2C phosphatases are involved in the induction of most ABA responses, as shown by the PP2C-deficient abi-mutants. These phosphatases show high homology with phosphatases that regulate MAP kinase activity in yeast. In addition, the role of farnesyl transferase as a negative regulator of ABA responses also indicates towards involvement of MAP kinase in ABA signal transduction. Farnesyl transferase is known to regulate Ras proteins, Ras proteins in turn are known to regulate MAP kinase activation. Interestingly, Ras-like proteins were detected in barley aleurone cells. Further establishment of the involvement of MAP kinase in ABA signal transduction and its role therein, still awaits more study. Subject NutritionAbscisic acidPhytohormonePhysiologyPlant physiologyReviewSignal transductionAbscisic AcidMAP Kinase Signaling SystemPlant Growth RegulatorsPlant Physiology To reference this document use: http://resolver.tudelft.nl/uuid:92970241-c87a-4bff-841d-5da0d4d6ca9e TNO identifier 235387 ISSN 0080-1844 Source Results and problems in cell differentiation, 27, 131-144 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.