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Influence of red light and acetylcholine on 45 Ca 2+ uptake by oat coleoptile cells was examined. It was found that the uptake is passive in darkness, while short, 10–15 min. exposure of coleoptile sections to red light or treatment with acetylcholine solution increases the rate of 45 Ca 2+ uptake from the medium. Calcium channel blockers, La 3+ and Verapamil, hinder 45 Ca 2+ uptake in darkness and neutralize the stimulative influence of red light and acetylcholine.
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Andrzej Tretyn (1987) studied this question.
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