Superoxide dismutase, catalase, and. alpha. -tocopherol content of stored potato tubers. [Solanum tuberosum L]
- Univ. of Minnesota, St. Paul (USA)
Activated oxygen or oxygen free radical mediated damage to plants has been established or implicated in many plant stress situations. The extent of activated oxygen damage to potato (Solanum tuberosum L.) tubers during low temperature storage and long-term storage is not known. Quantitation of oxygen free radical mediated damage in plant tissues is difficult. However, it is comparatively easy to quantitate endogenous antioxidants, which detoxify potentially damaging forms of activated oxygen. Three tuber antioxidants, superoxide dismutase, catalase, and {alpha}-tocopherol were assayed from four potato cultivars stored at 3{degree}C and 9{degree}C for 40 weeks. Tubers stored at 3{degree}C demonstrated increased superoxide dismutase activities (up to 72%) compared to tubers stored at 9{degree}C. Time dependent increases in the levels of superoxide dismutase, catalase, and {alpha}-tocopherol occurred during the course of the 40 week storage. The possible relationship between these increases in antioxidants and the rate of activated oxygen production in the tubers is discussed.
- OSTI ID:
- 5717684
- Journal Information:
- Plant Physiology; (USA), Vol. 94:3; ISSN 0032-0889
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
59 BASIC BIOLOGICAL SCIENCES
ANTIOXIDANTS
BIOCHEMICAL REACTION KINETICS
CATALASE
HYDROXYL RADICALS
MEASURING METHODS
METABOLISM
PEROXY RADICALS
PLANT TISSUES
SOLANUM
STORAGE LIFE
SUPEROXIDE DISMUTASE
SUPEROXIDE RADICALS
TOXICITY
VITAMIN E
BODY
ENZYMES
KINETICS
MAGNOLIOPHYTA
MAGNOLIOPSIDA
OXIDOREDUCTASES
PEROXIDASES
PLANTS
RADICALS
REACTION KINETICS
TISSUES
VITAMINS
560300* - Chemicals Metabolism & Toxicology
551000 - Physiological Systems