Share This Author
The Arabidopsis ABSCISIC ACID-INSENSITIVE2 (ABI2) and ABI1 genes encode homologous protein phosphatases 2C involved in abscisic acid signal transduction.
The homologous ABI1 and ABI2 phosphatases appear to assume partially redundant functions in ABA signaling, which may provide a mechanism to maintain informational homeostasis.
RPS2 of Arabidopsis thaliana: a leucine-rich repeat class of plant disease resistance genes.
The function of the RPS2 gene product in defense signal transduction is postulated to involve nucleotide triphosphate binding and protein-protein interactions and may also involve the reception of an elicitor produced by the avirulent pathogen.
ABSCISIC ACID SIGNAL TRANSDUCTION.
- J. Leung, J. Giraudat
- Biology, Environmental ScienceAnnual Review of Plant Physiology and Plant…
- 1 June 1998
Substantial evidence points to the importance of reversible protein phosphorylation and modifications of cytosolic calcium levels and pH as intermediates in ABA signal transduction.
Arabidopsis ABA response gene ABI1: features of a calcium-modulated protein phosphatase.
- J. Leung, M. Bouvier-Durand, P. Morris, D. Guerrier, F. Chefdor, J. Giraudat
- Environmental Science, BiologyScience
- 3 June 1994
Results suggest that the ABI1 protein is a Ca(2+)-modulated phosphatase and functions to integrate ABA and Ca2+ signals with phosphorylation-dependent response pathways.
Protein Phosphatases 2C Regulate the Activation of the Snf1-Related Kinase OST1 by Abscisic Acid in Arabidopsis[W]
Evidence that PP2Cs are directly implicated in the ABA-dependent activation of OST1 is provided and the activation mechanism of AMPK/Snf1-related kinases through the inhibition of regulating PP2C is conserved from plants to human.
Phosphorylation of the Arabidopsis AtrbohF NADPH oxidase by OST1 protein kinase
An update on abscisic acid signaling in plants and more...
Undoubtedly, the most astonishing revelation is that ABA is not restricted to plants and mosses, but overwhelming evidence now indicates that it also exists in metazoans ranging from the most primitive to the most advance on the evolution scale (sponges to humans).
Constitutive activation of a plasma membrane H+‐ATPase prevents abscisic acid‐mediated stomatal closure
The results provide evidence that AHA1 is a distinct component of an ABA‐directed signaling pathway, and that dynamic downregulation of this pump during drought is an essential step in membrane depolarization to initiate stomatal closure.
A New Medicago truncatula Line with Superior in Vitro Regeneration, Transformation, and Symbiotic Properties Isolated Through Cell Culture Selection
A Medicago truncatula line suitable for genetic analysis of Medicago-Rhizobium meliloti symbiosis because of its high regeneration capacity and broad R.meliloti strain specificity is proposed.
Sensitivity to abscisic acid of guard-cell K+ channels is suppressed by abi1-1, a mutant Arabidopsis gene encoding a putative protein phosphatase.
- F. Armstrong, J. Leung, A. Grabov, J. Brearley, J. Giraudat, M. Blatt
- Biology, Environmental ScienceProceedings of the National Academy of Sciences…
- 10 October 1995
An aberrant K+ channel behavior is demonstrated--including channel insensitivity to ABA-dependent alkalinization of pHi--as a major consequence of abi1-1 action and implicate AB11 as part of a phosphatase/kinase pathway that modulates the sensitivity of guard-cell K+ channels to A BA-evoked signal cascades.