Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 78:203-206 (1985)
© 1985 American Society of Plant Biologists

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Effectiveness of Intermittent Light Treatments on Anthocyanin Synthesis in Dark-Grown and Light-Pretreated Seedlings 1

Alberto L. Mancinelli and Isaac Rabino2

Department of Biological Sciences, Columbia University, New York, New York 10027

Differences in the extent of anthocyanin production between intermittent light treatments with short and long dark intervals between successive irradiations are more pronounced in dark-grown than in light-pretreated cabbage seedlings. This observation is consistent with the hypothesis, based on destruction kinetics data, that there might be two pools of phytochrome, a labile one and a stable one, present in different proportions in dark-grown and light-pretreated seedlings, and suggests that light-dependent changes of the stable to labile phytochrome ratio might be physiologically significant in the photoregulation of photomorphogenic responses.

2 Permanent address: Department of Natural Sciences, CUNY, Baruch College, New York, NY 10010.

1 Supported partially by National Science Foundation grant PCM-80-08747 to A.L.M.






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