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Arabidopsis mutant deficient in 3 abscisic acid-activated protein kinases reveals critical roles in growth, reproduction, and stress.

Proceedings of the National Academy of Sciences of the United States of America - 19 May 2009

Fujii Hiroaki, Zhu Jian-Kang

Abstract excerpt

Abscisic acid (ABA) is an important phytohormone regulating seed dormancy, germination, seedling growth, and plant transpiration. We report here an Arabidopsis triple mutant that is disrupted in 3 SNF1-related protein kinase subfamily 2 (SnRK2s) and nearly completely insensitive to ABA. These SnRK2s, SnRK2.2, SnRK2.3, and SnRK2.6 (also known as OST1), are activated by ABA and can phosphorylate the ABA-responsive...

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Abscisic Acid
Arabidopsis Proteins
Gene Expression Regulation, Enzymologic
Germination
Growth and Development

Methodology Data sources Editorial policy Privacy About Contact Helena Bioinformatics

Plant Physiological Phenomena

Protein Serine-Threonine Kinases

Stress, Physiological

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Identifiers

PMID: 19420218
DOI: 10.1073/pnas.0903144106
PMCID: PMC2688869

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Arabidopsis mutant deficient in 3 abscisic acid-activated protein kinases reveals critical roles in growth, reproduction, and stress.PMID 19420218Read ↗

Three Arabidopsis SnRK2 protein kinases, SRK2D/SnRK2.2, SRK2E/SnRK2.6/OST1 and SRK2I/SnRK2.3, involved in ABA signaling are essential for the control of seed development and dormancy.Semantic proximity Read ↗

Quantitative phosphoproteomics identifies SnRK2 protein kinase substrates and reveals the effectors of abscisic acid action.Semantic proximity Read ↗

The Arabidopsis kinase-associated protein phosphatase KAPP, interacting with protein kinases SnRK2.2/2.3/2.6, negatively regulates abscisic acid signaling.Semantic proximity Read ↗

MAP3Kinase-dependent SnRK2-kinase activation is required for abscisic acid signal transduction and rapid osmotic stress response.Semantic proximity Read ↗

Arabidopsis decuple mutant reveals the importance of SnRK2 kinases in osmotic stress responses in vivo.Semantic proximity Read ↗

Three SnRK2 protein kinases are the main positive regulators of abscisic acid signaling in response to water stress in Arabidopsis.Semantic proximity Read ↗

SnRK2.4 and SnRK2.10 redundantly control developmental leaf senescence by sustaining ABA production and signaling.Semantic proximity Read ↗

Identification of Open Stomata1-Interacting Proteins Reveals Interactions with Sucrose Non-fermenting1-Related Protein Kinases2 and with Type 2A Protein Phosphatases That Function in Abscisic Acid Responses.Semantic proximity Read ↗

Rapid Phosphoproteomic Effects of Abscisic Acid (ABA) on Wild-Type and ABA Receptor-Deficient A. thaliana Mutants.Semantic proximity Read ↗

The PP6 phosphatase regulates ABI5 phosphorylation and abscisic acid signaling in Arabidopsis.Semantic proximity Read ↗

The structure of Arabidopsis thaliana OST1 provides insights into the kinase regulation mechanism in response to osmotic stress.Semantic proximity Read ↗

ABA-activated SnRK2 protein kinase is required for dehydration stress signaling in Arabidopsis.Semantic proximity Read ↗

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