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Effects of circadian clock and light on melatonin concentration in Hypericum perforatum L. (St. John's Wort) - PubMed https://t.co/XiHzqhLNe0
Effects of circadian clock and light on melatonin concentration in Hypericum perforatum L. (St. John's Wort) - PubMed https://t.co/XiHzqhLNe0
Melatonin concentration in st John's wort was about 6x higher under long-day cond. (18-hL:6-hD) than under short-day cond. (10-hL:14-hD)... Traditional st John's wort harvest day? Summer solstice. https://t.co/i0oObkdGvP