Water stress and the catabolism of (�)-abscisic acid by excised leaves of Hordeum vulgare L. cv. Dyan

Autor:	A. Keith Cowan, Ian D. Railton
Rok vydání:	1987
Předmět:	Chromatography Physiology Catabolism Water stress Substrate (chemistry) Plant physiology Endogeny Plant Science chemistry.chemical_compound Phaseic acid chemistry Biochemistry Hordeum vulgare Agronomy and Crop Science Abscisic acid
Zdroj:	Plant Growth Regulation. 5:115-124
ISSN:	1573-5087 0167-6903
DOI:	10.1007/bf00024739
Popis:	When excised, light-grown leaves of Hordeum vulgare were fed with (±)-[2-14C]-abscisic acid and stressed until they had lost 12% of their original fresh weight, marked changes in the distribution of radioactivity between abscisic acid and its catabolites were observed. Wilted leaves were less able than their turgid counterparts to transform (±)-[2-14C]-abscisic acid into 2′-hydroxymethyl abscisic acid, dihydrophaseic acid and water-soluble conjugates of abscisic acid. Water stress had little effect on the production of phaseic acid although refeeding studies with [14C]-phaseic acid showed that the step from phaseic acid to dihydrophaseic acid was inhibited in wilted leaves. Evidence was obtained which suggested that these changes did not result from dilution of applied, radiolabelled substrate by endogenous abscisic acid. The catabolites of (±)-abscisic acid were identified by capillary gas chromatography-mass spectrometry.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::13f51c32c368fb0c06cb14a338a8d64f https://doi.org/10.1007/bf00024739 Zobrazit plný text záznamu Full text from SpringerLink