title: Complex regulation of ABA biosynthesis in plants.
abstract: Abscisic acid (ABA) is a plant hormone that plays important roles during many phases of the plant life cycle, including seed development and dormancy, and in plant responses to various environmental stresses. Because many of these physiological processes are correlated with endogenous ABA levels, the regulation of ABA biosynthesis is a key element facilitating the elucidation of these physiological characteristics. Recent studies on the identification of genes encoding enzymes involved in ABA biosynthesis have revealed details of the main ABA biosynthetic pathway. At the same time, the presence of gene families and their respective organ-specific expression are indicative of the complex mechanisms governing the regulation of ABA biosynthesis in response to plant organ and/or environmental conditions. There have been recent advances in the study of ABA biosynthesis and new insights into the regulation of ABA biosynthesis in relation to physiological phenomena.
authors.affiliation: Dept of Biological Sciences, Tokyo Metropolitan University, Hachioji-shi, 192-0397, Tokyo, Japan. sseo@hoshoku-mac2.biol.metro-u.ac.jp
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Seo
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Koshiba
mesh_terms: D000040:Abscisic Acid / Q000096:biosynthesis* / Q000502:physiology; D042931:Aldehyde Oxidase; D000445:Aldehyde Oxidoreductases / Q000378:metabolism; D002338:Carotenoids / Q000378:metabolism; D002736:Chloroplasts / Q000378:metabolism; D049308:Dioxygenases; D018506:Gene Expression Regulation, Plant; D010088:Oxidoreductases / Q000378:metabolism; D010105:Oxygenases / Q000378:metabolism; D010788:Photosynthesis; D010937:Plant Growth Regulators / Q000096:biosynthesis* / Q000502:physiology; D010940:Plant Proteins; D010944:Plants / Q000235:genetics / Q000378:metabolism*; D011106:Polyisoprenyl Phosphates / Q000378:metabolism; D012639:Seeds / Q000254:growth & development / Q000502:physiology; D012717:Sesquiterpenes / Q000378:metabolism; D014867:Water / Q000378:metabolism
chemical_list: D010937:Plant Growth Regulators; D010940:Plant Proteins; D011106:Polyisoprenyl Phosphates; D012717:Sesquiterpenes; D014867:Water; C012475:xanthoxin; D002338:Carotenoids; D000040:Abscisic Acid; C004808:farnesyl pyrophosphate; D010088:Oxidoreductases; C097153:zeaxanthin epoxidase; D010105:Oxygenases; D049308:Dioxygenases; C109043:9-cis-epoxy-carotenoid dioxygenase; D000445:Aldehyde Oxidoreductases; D042931:Aldehyde Oxidase