ORIGIN OF HYDROXYPHYTOENE DERIVATIVES FORMED IN THE PRESENCE OF BLEACHING HERBICIDES

被引：2

作者：

ALBRECHT, M ^{[1
]}

SANDMANN, G ^{[1
]}

机构：

[1] UNIV FRANKFURT, INST BOT, BIOSYNTH GRP, D-60054 FRANKFURT, GERMANY

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 1995年 / 43卷 / 06期

关键词：

CRESS SEEDLINGS; 1,2-EPOXY-1,2-DIHYDROPHYTOELZE; FLURTAMONE; HYDROXY-1,2-EPOXY-2,2 DIHYDROPHYTOENE; HYDROXYLATION; PHOTOOXIDATION; PHYTOENE; SCENEDESMUS;

D O I：

10.1021/jf00054a054

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Algae and higher plants treated with the bleaching herbicide flurtamone accumulate not only phytoene but also several derivatives that have phytoene-like spectra. The formation of different hydroxyphytoenes was light-dependent and increased with light intensity. Hydroxylation of phytoene and phytoene epoxide could also be detected in solution with chlorophyll as photosensitizer, With hydroxy-1,2-epoxy-1,2-dihydrophytoene as substrate, the major reaction products could be identified by mass spectroscopy as hydroxy-1,2-epoxy-1,2-dihydrophytoenes. The mechanism responsible for the formation of hydroxy derivatives of phytoene or phytoene epoxide is a nonenzymatic photochemical reaction sensitized, e.g., by chlorophyll. This reaction is not specific for the substrate. The singlet oxygen involved preferentially attacks isolated double bands of the substrate molecule.

引用

页码：1701 / 1704

页数：4

共 16 条

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