Manipulation of ascorbic acid levels in Arabidopsis thaliana
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To further investigate this discovery, wild type and ascorbic acid-deficient Arabidopsis thaliana were transformed with the glo. Homozygous lines of these transformants were generated and the ascorbic acid levels were compared to the untransformed wild type and mutant plants. Although the wild type plants containing glo did not show a significant increase in ascorbic acid production, all five of the vtc mutant lines had an increased ascorbic acid content relative to wild type level. These data suggest that an alternative pathway is present in plants that does not require many of the steps in the published Smirnoff-Wheeler (1998) pathway to produce ascorbic acid.
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