ISHS Acta Horticulturae 766: XXVII International Horticultural Congress - IHC2006: International Symposium on Ornamentals, Now!
MECHANICAL STRESS MODIFIES ENDOGENOUS ETHYLENE AND GIBBERELLIN PRODUCTION IN CHRYSANTHEMUM |
| Authors: | C. Zheng, W. Wang, Z. Huang, T. Hara |
| Keywords: | brushing, endogenous hormone, growth inhibition |
| Abstract:
Chrysanthemum [Dendranthema grandiflora (Ramat.) Kitam.] plants treated 30 days after planting with mechanical stress by brushing for 30 days, produced more ethylene on the third day and maintained high ethylene production, while control plants had low ethylene levels throughout the experiments. Gibberellic acid (GA)-like substances in the control plants were separated into 4 bands on silica gel TLC plates. At the same Rf of authentic GA1, GA3, and GA7, GA1- and GA3-like substance contents decreased markedly in brushed plants compared with the control plants. This result suggests that mechanical stress reduced stem elongation of chrysanthemum is affected by the activity of GA and ethylene production. | |
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