Flower-Inducing Activity of Phloem Exudate in Cultured Apices from Pharbitis Seedlings |
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| Authors: | Ishioka, Nahoko Tanimoto, Shizufumi Harada, Hiroshi |
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| Affiliation: | 1Genetic Engineering Laboratory, Faculty of Agriculture, Saga University Honjo, Saga, 840 Japan
2Institute of Biological Sciences, University of Tsukuba Tsukuba, Ibaraki, 305 Japan |
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| Abstract: | Phloem exudate from cotyledons of photoperiodically inducedPharbitis plants induced flowering in apices excised from non-inducedseedlings and cultured in vitro. The exudate also stimulatedflowering in apices excised from photo-induced seedlings andcultured under long-day conditions. The application of benzoicacid had similar effects. Both the exudate from non-inducedplants and gallic acid suppressed flowering in apices from photo-inducedseedlings. It appears that the phloem exudate contains flower-inducingor flower-suppressing substance(s), depending on the plant materialsfrom which it was collected. (Received August 15, 1989; Accepted May 14, 1990) |
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