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
Nutrition
Abscisic acid
Phytohormone
Physiology
Plant physiology
Review
Signal transduction
Abscisic Acid
MAP Kinase Signaling System
Plant Growth Regulators
Plant Physiology
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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