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Kinetin induces formation of red pigment in seedlings of Amaranthus retroflexus in the dark. This effect is similar to the light-induced formation of pigment. Light and kinetin do not act in a simple additive way. The pigment is not an anthocyanin, and its formation is not affected by inhibitors of anthocyanin formation.
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Bamberger et al. (1960) studied this question.
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