The biological activity of sixteen gibberellin A4 and gibberellin A9 derivatives using seven bioassays |
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| Authors: | Gordon V. Hoad Bernard O. Phinney Valerie M. Sponsel Jake Macmillan |
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| Affiliation: | 1. Long Ashton Research Station, University of Bristol, Long Ashton, Bristol, BS18 9AF, U.K.;2. Department of Botany, University of California, Los Angeles, CA 90024, U.S.A.;3. School of Chemistry, The University of Bristol, Bristol, BS8 1TS, U.K. |
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| Abstract: | ![]()
C2- and C3-derivatives of GA4 and GA9 were tested for biological activity in a range of plant assays. The activity of most of these derivatives was equal to, or less than, that of the parent GAs. However, 2β-methylGA4 and 2,2-dimethylGA4 had a higher activity than GA4 in some assays and the latter derivative was shown to be the most active GA known to date in the Forward oat first leaf, Tan-ginbozu dwarf rice and d5-maize assays. Two other derivatives, 12,16-cycloGA9 and 19-desoxyGA9 had less activity than GA9. |
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| Keywords: | Monocotyledons dicotyledons biological activity |
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