A lack of correlation between the biological activity and rate of metabolism of ent-(3H)-17-kaurenoic acid by seedlings of dwarf rice cv. Tan-ginbozu |
| |
Authors: | Railton, I. D. Durley, R. C. Pharis, R. P. |
| |
Affiliation: | Department of Biology, University of Calgary Calgary T2N 1N4, Alberta, Canada |
| |
Abstract: | Significant leaf sheath elongation occurred within 24 hr afterapplication of 10 µg (0.67, µCi) of ent-(3H)-17-kaurenoicacid (KA) to individual seedlings of dwarf rice cv. Tan-ginbozu,but this growth was unaccompanied by production of significantlevels of radioactivity in more polar, acidic, ethyl acetate-solublemetabolites of (3H)-KA. However modest levels of radioactivityappeared in the highly water-soluble fraction by hour 24, subsequentto the most rapid phase of KA-induced growth. Growth continuedand by hour 48 was accompanied by the appearance of small amountsof radioactivity in polar, acidic products. It would appearthat KA per se, and not its metabolic products, may be responsiblefor the leaf sheath elongation noted at hour 24. On the speculation that it might be a metabolite of KA, gibberellinA14 (GA14) was applied simultaneously with (3H)-KA to individualrice seedlings. Several changes in the metabolism of 3H-KA inthe presence of GA14 were noted, and GA14 antagonized the KA-inducedsheath elongation. 1Present address: Botany Department, Rhodes University, Grahamstown,6140, South Africa.2Present address: Crop Science Department, University of Saskatchewan,Saskatoon, Sask. S7N OWO, Canada. (Received May 12, 1975; ) |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|