الفهرس 
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Abstract
The present study was conducted to evaluate three types of sprouting inhibitors; gamma irradiation, essential oils and iodine on germination of potato tubers. The activities of biochemical enzymes: catalase, Glutathione-S-transferase, peroxidase, polyphenol oxidase and superoxide dismutase, in addition to lipid peroxidation level were tested in potato tubers stored for 3, 6 and 9 weeks of germination. As general trend the activities of the enzymes recorded are significantly found on the range of enzyme control or less , which prevent of potato tubers from germination