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Influence of Short Term Inhibitor Treatment on the Flowering of Lemna perpusilla 6746 ^1,2

^a Department of Environmental Horticulture, University of California, Davis, California 95616

Short term inhibitor treatment can be used to examine the processes that occur during an inductive dark period in the short day plant Lemna perpusilla Torr., strain 6746. Several inhibitors of protein biosynthesis are most effective in reducing per cent flowering when treatment occurs over the 2-hour intervals beginning at the 12th hour or the 14th hour of a 8 (16) photoperiodic cycle. The antimetabolite, 5-fluorouracil, is most effective when treatment occurs early in the dark period. Evidence is cited suggesting that distilled water incubation inhibits flowering by interfering with protein biosynthesis.

² A portion of this report is taken from a dissertation submitted in partial fulfillment of the requirements for a Ph.D. degree in plant physiology at the University of California, Davis.

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