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Article

Arabidopsis OST1 protein kinase mediates the regulation of stomatal aperture by abscisic acid and acts upstream of reactive oxygen species production.

The Plant cell - 1 Dec 2002

Mustilli Anna-Chiara, Merlot Sylvain, Vavasseur Alain, Fenzi Francesca, Giraudat Jérôme

Abstract excerpt

During drought, the plant hormone abscisic acid (ABA) triggers stomatal closure, thus reducing water loss. Using infrared thermography, we isolated two allelic Arabidopsis mutants (ost1-1 and ost1-2) impaired in the ability to limit their transpiration upon drought. These recessive ost1 mutations disrupted ABA induction of stomatal closure as well as ABA inhibition of light-induced stomatal opening. By contrast,...

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Identifiers

PMID: 12468729
DOI: 10.1105/tpc.007906
PMCID: PMC151204

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 6 Sept 2026. Manifest publication-graph-cohort-2026-09-06.1.

Source receipt: pubmed, retrieved 6 Sept 2026.

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