CAROTENOID METABOLISM AND THE BIOSYNTHESIS OF ABSCISIC-ACID

被引：52

作者：

PARRY, AD

HORGAN, R

机构：

[1] Department of Biological Sciences, The University College of Wales, Aberystwyth

来源：

PHYTOCHEMISTRY | 1991年 / 30卷 / 03期

关键词：

LYCOPERSICON-ESCULENTUM; SOLANACEAE; PHASEOLUS-VULGARIS; LEGUMINOSAE; CAROTENOID METABOLISM; DEUTERIUM LABELING; APO-CAROTENOIDS; NEOXANTHIN; VIOLAXANTHIN; ABSCISIC ACID;

D O I：

10.1016/0031-9422(91)85258-2

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The conversion of all-trans-violaxanthin to 9'-cis-neoxanthin was shown to occur in fluridone-treated etiolated Lycopersicon and Phaseolus seedlings, following exposure to light. The results of deuterium oxide labelling experiments supported this precursor/product relationship, and provided further evidence for the origin of abscisic acid. Several apo-carotenoids, putative by-products of abscisic acid biosynthesis, were synthesised by chemical oxidation but were not detected in plant extracts. In vitro, lipoxygenase cleaved neoxanthin and violaxanthin down to small (less-than-or-equal-to C-13) fragments. It may be that in vivo any apo-carotenoids formed by the specific cleavage of 9'-cis-neoxanthin, during abscisic acid biosynthesis, are rapidly metabolized by lipoxygenase or similar enzymes.

引用

页码：815 / 821

页数：7

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