期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1972
卷号：69
期号：8
页码：2150-2154
DOI：10.1073/pnas.69.8.2150
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：At least two photoreactions can be demonstrated in plant developmental responses: the low-energy requiring phytochrome system and the high energy reaction. The action of these photoreactions on the formation of anthocyanin by turnip seedlings is discussed. The synthesis of small amounts of anthocyanin can be controlled solely by phytochrome, as evidenced by the red-far-red photoreversible effect of brief irradiations. Appreciable synthesis requires prolonged irradiations, the duration of irradiation being more important than intensity. The data presented suggest that the energy dependence of anthocyanin synthesis arises through photosynthesis. A mechanism for the interaction between photosynthesis and phytochrome is suggested. Under conditions of natural illumination of plants, the concentration of the species of phytochrome that absorbs far-red light may be lower than previously realized.
