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Effect of paclobutrazol on membrane lipids in apple seedlings
Author(s) -
Wang S. Y.,
Sun T.,
Whitaker B. D.,
Faust M.
Publication year - 1988
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1988.tb05441.x
Subject(s) - paclobutrazol , campesterol , phosphatidylethanolamine , sterol , phosphatidylcholine , phosphatidylinositol , chemistry , phosphatidylglycerol , malus , biochemistry , phospholipid , fatty acid , palmitic acid , linolenic acid , food science , botany , biology , membrane , cholesterol , linoleic acid , kinase
The effect of paclobutrazol [( 2RS, 3RS )‐1‐(4‐chlorophenyl)‐4,4‐dimethyl‐2‐(1,2, 4‐triazol‐1‐yl) pentan‐3‐ol] on the fatty acid composition of polar lipids and on the sterol content in apple ( Malus domestica Borkh. cv. York Imperial) seedlings was determined. Polar lipids isolated from leaves, stems and roots included mono‐ and digalactosyldiglycerides and the phospholipids phosphatidylinositol, phosphatidylcholine, phosphatidylglycerol and phosphatidylethanolamine. The predominant fatty acids in membrane polar lipids were palmitic (C16:0), linolnic (C18:2) and linolenic (C18:3). The predominant sterol, both free and esterified, was β‐sitosterol. There were no significant alterations in the fatty‐acid composition of glyco‐ and phospholipids from paclobutrazol‐treated apple seedlings. In contrast, a significant decrease in the content of β‐sitosterol and campesterol occurred in treated tissues. The decline in sterol content continued with increasing duration of paclobutrazol treatment, and was most pronounced in the root tissue.