title: G protein signaling in the regulation of Arabidopsis seed germination.
abstract: Seed germination and early seedling growth are regulated by an intricate network of hormonal signaling pathways. The plant hormones gibberellic acid (GA) and brassinosteroids (BRs) are important positive regulators of these processes, whereas the hormone abscisic acid (ABA) is a potent negative regulator. In Arabidopsis, analysis of mutant plants has implicated heterotrimeric guanine nucleotide-binding protein (G protein) components in regulation of seed germination by all three of these hormones.
authors.affiliation: Biology Department, Penn State University, 208 Mueller Laboratory, University Park, PA 16802, USA. sma3@psu.edu
authors.forename: Sarah M
authors.initials: SM
authors.lastname: Assmann
mesh_terms: D000040:Abscisic Acid / Q000494:pharmacology / Q000502:physiology; D017360:Arabidopsis / Q000502:physiology*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000502:physiology*; D002241:Carbohydrates / Q000502:physiology; D044385:GTP-Binding Protein alpha Subunits / Q000235:genetics / Q000502:physiology; D018525:Germination / Q000502:physiology; D020962:Heterotrimeric GTP-Binding Proteins / Q000502:physiology*; D008954:Models, Biological; D010937:Plant Growth Regulators / Q000502:physiology; D043562:Receptors, G-Protein-Coupled / Q000235:genetics / Q000502:physiology; D012639:Seeds / Q000502:physiology; D015398:Signal Transduction / Q000502:physiology*
chemical_list: D029681:Arabidopsis Proteins; D002241:Carbohydrates; C112029:GCR1 protein, Arabidopsis; C429765:GPA1 protein, Arabidopsis; D044385:GTP-Binding Protein alpha Subunits; D010937:Plant Growth Regulators; D043562:Receptors, G-Protein-Coupled; D000040:Abscisic Acid; D020962:Heterotrimeric GTP-Binding Proteins