8-VINYL REDUCTION AND CHLOROPHYLL A BIOSYNTHESIS IN HIGHER-PLANTS

被引:31
作者
WHYTE, BJ [1 ]
GRIFFITHS, WT [1 ]
机构
[1] UNIV BRISTOL, SCH MED SCI, DEPT BIOCHEM, BRISTOL BS8 1TD, AVON, ENGLAND
关键词
D O I
10.1042/bj2910939
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
A technique involving solid-phase extractions and polyethylene h.p.l.c suitable for the routine compositional analysis of the total protochlorophyllide pool of plants is described. The resynthesis kinetics of the individual components of the pool have been studied in briefly illuminated etiolated tissue of wheat (Triticum aestivum) and cucumber (Cucumis sativus) during subsequent redarkening. The data are interpreted in terms of a precursor-product relationship between the di- and mono-vinyl analogues of protochlorophyllide during their reaccumulation in darkness. The interconversion is assumed to be catalysed by an 8-vinyl reductase, which shows greater activity in wheat than in cucumber. Analyses of the redox state of the nicotinamide nucleotide of the pool during the process are compatible with NADPH as the cofactor of the putative reductase.
引用
收藏
页码:939 / 944
页数:6
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