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Plant and Cell Physiology, 1998, Vol. 39, No. 6 655-659
© 1998

Short Communication

Deterioration of Mitochondrial Membranes from Castor Bean Endosperm by Hydrogen Peroxide

Hyun Ja Kwon1, Woo Sung Lee1 and Sungho Shin2,3

1 Department of Biology and Basic Science Research Institute, Sung Kyun Kwan University Suwon 440-746, Korea
2 Agency for Defense Development P. O. Box 35-1, Yuseong, Taejon 305-600, Korea

Loss of membrane integrity by hydrogen peroxide (H2O2) was studied in isolated mitochondria of castor bean. Incubation of mitochondria with H2O2 resulted in the release of fumarase with a concomitant loss of phospho-lipids. Degradation of membrane was found to occur independent of lipid peroxidation. H2O2-treated mitochondria were able to degrade exogenous radiolabelled phospho-lipids.

3Corresponding author; fax 82-42-821-2391

(Received August 28, 1997; Accepted March 10, 1998)
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