Changes in membrane lipid components and antioxidant levels during natural ageing of seeds of Acer platanoides |
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Authors: | Stanislawa Pukacka |
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Institution: | Polish Academy of Sciences, Inst. of Dendrology, PL-62-035 Kornik, Poland;. |
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Abstract: | Changes in membrane lipid components and cellular antioxidant systems were investigated through 7 years in seeds of Acer platanoides L. after storage in natural conditions, i.e. - 3°C and 10% water content. The loss of germination capacity in aged seeds was associated with increased solute leakage during imbibition, reduced content of phospholipids, especially phosphatidylcholine, and increased free fatty acid content. A marked decrease of unsaturated fatty acids in the phospholipid fraction was observed after one year of storage. Antioxidant potential in the lipid fraction and level of -SH groups decreased during storage. The results are consistent with the hypothesis that ageing in seeds is mediated by a free radical mechanism. |
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Keywords: | Acer platanoides ageing antioxidants free fatty acids lipid peroxidation membranes Norway maple phospholipids |
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