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. 1988 May;87(1):1–4. doi: 10.1104/pp.87.1.1

Superoxide Free Radicals Are Produced in Glyoxysomes 1

Luisa M Sandalio 1,2, Victor M Fernández 1,2, Francisco L Rupérez 1,2, Luis A Del Río 1,2
PMCID: PMC1054687  PMID: 16666081

Abstract

The production of superoxide free radicals in pellet and supernatant fractions of glyoxysomes, specialized plant peroxisomes from watermelon (Citrullus vulgaris Schrad.) cotyledons, was investigated. Upon inhibition of the endogenous superoxide dismutase, xanthine, and hypoxanthine induced in glyoxysomal supernatants the generation of O2− radicals and this was inhibited by allopurinol. In glyoxysomal pellets, NADH stimulated the generation of superoxide radicals. Superoxide production by purines was due to xanthine oxidase, which was found predominantly in the matrix of glyoxysomes. The generation of O2− radicals in glyoxysomes by endogenous metabolites suggests new active oxygen-related roles for glyoxysomes, and for peroxisomes in general, in cellular metabolism.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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