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Desiccation-sensitivity and membrane lipid peroxidation of loquat (Eriobotrya japonica L.) seed

Chen Junsong, Chen Runzheng, Fu Jiarui

College of Life Science,Zhongshan University.Guangzhou 510275,Guangdong

Abstract

The loquat (Eriobotrya japonica L.) seeds were desiccation-sensitive when shedded. With the lost of water, seed vigor decreased rapidly. The activities of superoxide dismutase (SOD) and peroxidase (POD) also decreased, while the conductivity of seeds leachate and the contents of malonaldehyde (MDA) increased remarkably. Seed viability could be increased by treatments with ASA, reduced glutathione (GSH) and Ca~(2+), which could enhance the activities of SOD, lower the contents of MDA and alleviate the damage to membrane lipids by peroxidation in seed desiccation.

Key words: loquat (Eriobotrya japonica L.)seed;Desiccation sensitive;Membrane lipids peroxidation

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Citing This Article：

Chen Junsong, Chen Runzheng, Fu Jiarui. Desiccation-sensitivity and membrane lipid peroxidation of loquat (Eriobotrya japonica L.) seed. Acta Physiol Sin 1999; 51 (4): (in Chinese with English abstract).