SCAVENGING TOXIC RADICALS. “Some cold-hardened species demonstrate a resistance to photoinhibition that may result from increased metabolism of active oxygen scavengers. Cold acclimatization has been associated with increased levels of ascorbate, ascorbate peroxidase, dehydroascorbate reductase, ascorbate free radical reductase, glutathione, glutathione reductase, and superoxide dismutase.”
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