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The Role of Benzoic Acid and Plant Hormones in Flowering of Lemna gibba G3 |
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| Authors: | Fujioka, Shozo Yamaguchi, Isomaro Murofushi, Noboru Takahashi, Nobutaka Kaihara, Sumiko Takimoto, Atsushi Cleland, Charles F. |
| Affiliation: | 1 The Institute of Physical and Chemical Research Wako, Saitama 351-01, Japan 2 Department of Agricultural Chemistry, The University of Tokyo Bunkyo-ku, Tokyo 113, Japan 3 Laboratory of Applied Botany, Faculty of Agriculture, Kyoto University Kyoto 606, Japan 4 Smithsonian Environmental Research Center 12441 Parklawn Drive, Rockville, Maryland 20852-1773, U.S.A. |
| Abstract: | The level of benzoic acid was measured in Lemna gibba G3 grownon M and E media under inductive and non-inductive daylengths.Benzoic acid was slightly higher in plants grown on M mediumbut there was no difference in the benzoic acid levels in floweringand vegetative plants. When L. gibba G3 was grown under continuouslight on 1/10 M medium or 1/2 H medium there was virtually noflowering, but addition of benzoic acid to either medium ledto a substantial flowering response. In both cases this floweringresponse was inhibited by the plant hormones IAA, GA3, ABA andzeatin, with IAA and GA3 being the least inhibitory and ABAbeing the most inhibitory. This same pattern of inhibition wasseen when L. gibba G3 was grown on M medium under continuouslight, conditions that lead to photoinduction of flowering.These results leave open the possibility that endogenous benzoicacid may interact with other factors to influence the floweringresponse in L. gibba G3. (Received November 13, 1984; Accepted February 27, 1985) |
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