title: OPEN STOMATA1 opens the door to ABA signaling in Arabidopsis guard cells.
abstract: The plant hormone abscisic acid plays a crucial role in plant responses to drought, salinity and cold. A recent report shows that mutations in the OST1 gene, encoding a serine-threonine protein kinase, render Arabidopsis thaliana guard cells insensitive to abscisic acid, such that stomata remain open in the presence of this phytohormone.
authors.affiliation: Biology Department, Penn State University, University Park, PA 16802-5301, USA. sma3@psu.edu
authors.forename: Sarah M
authors.initials: SM
authors.lastname: Assmann
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism*; D017360:Arabidopsis / Q000166:cytology* / Q000235:genetics / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D018515:Plant Leaves / Q000166:cytology* / Q000235:genetics / Q000378:metabolism*; D011494:Protein Kinases / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction
chemical_list: D029681:Arabidopsis Proteins; D000040:Abscisic Acid; D011494:Protein Kinases; C472139:OST1 protein, Arabidopsis