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The exposure of potato tubers to light resulted in a significant cultivar‐dependent increase in chlorogenic acid content. The magnitude of the observed increase resulting from 48 h light exposure was significantly correlated with the initial chlorogenic acid content of the tubers and also with the previously reported photo‐induced increases in total glycoalkaloids. Time‐course studies indicated that the greatest rate of increase occurred between 8 and 16 h continual exposure. Prolonged storage under light revealed that chlorogenic acid values in some cultivars reached a maximum value after 48 h, whilst in others these continued to increase almost linearly until the end of the experiment 5 days later.
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Griffiths et al. (1995) studied this question.
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