Effects of Copper on the Changes of Membrane Lipids, Photosynthetic Pigments and Thiol-containinng Compounds in Zinnia elegans Leaves
Resource
Taiwania 44 (2): 259-270
Journal
TAIWANIA
Pages
259-270
Date Issued
1999
Date
1999
Author(s)
Ma, Shieu-Yun
Chen, Yung-Reui
Abstract
Five-week-old plants of Zinnia elegans were grown in culture medium containing 50 μM CuSO4. Plasma membrane was isolated and purified from both leaves of control and susceptible plants with method of polyethylene glycol/dextrin two-phase partition system. The major fatty acids of plasma membrane were identified as palmitic acid (16:0), linoleic acid (18:2) and linolenic acid (18:3). The ratios of unsaturated fatty acids to saturated fatty acids were reduced in copper-treated plants. The productions of lipid peroxides and nonprotein thiol-containing compound were obviously enhanced in copper-treated plants. Copper also caused the increment in chlorophyll content and total amounts of carotenoids in young leaves.
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