EFFECTS OF TEMPERATURE, LIGHT AND A CHEMICAL MODULATOR ON LINOLENATE BIOSYNTHESIS IN MUTANT AND WILD-TYPE ARABIDOPSIS CALLI

被引：19

作者：

BROCKMAN, JA ^{[1
]}

NORMAN, HA ^{[1
]}

HILDEBRAND, DF ^{[1
]}

机构：

[1] USDA ARS, BELTSVILLE AGR RES CTR, WEED SCI LAB, BELTSVILLE, MD 20705 USA

来源：

PHYTOCHEMISTRY | 1990年 / 29卷 / 05期

关键词：

Arabidopsis thaliana; Cruciferae; environmental effects; lipid synthesis; mutants; polyunsaturated fatty acids; tissue culture;

D O I：

10.1016/0031-9422(90)80098-2

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：

Temperature and light affected desaturation of linoleic acid (18:2) to linolenic acid (18:3) at the sn-1 and sn-2 positions of specific lipids in an independent manner in callus tissue of Arabidopsis thaliania. The prokaryotic pathway of desaturation predominated in tissue grown at 28° while at 18° the eukaryotic pathway predominated. The effects of the fadD mutation were diminished by continued growth in darkness. 4-Chloro-5-dimethylamino-2-phenyl-3(2H)-pyridazinone, a compound thought to reduce desaturation of 18:2 by the prokaryotic pathway, caused a reduction in a specific polypeptide. This same polypeptide was reduced in a mutant of Arabidopsis (fadD) that has genetically reduced amounts of 18:3. The correlation between reduced levels of this polypeptide and reduced levels of 18:3 suggest an involvement of this polypeptide in fatty acid desaturation. © 1990.

引用

页码：1447 / 1453

页数：7

共 27 条

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