ISHS Acta Horticulturae 167: II Symposium on Growth Regulators in Floriculture
FURTHER RESEARCH ABOUT THE EFFECTS OF GIBBERELLIC ACID UPON FREESIA FLOWERING |
| Author: | M. Cocozza Talia |
| Abstract:
Previous research had shown the Freesia flowering could be advanced considerably by treating the corms with 100 ppm gibberellin (GA3) prior to planting at 12°C for 4 weeks. In order to find out whether this shortening in the growth cycle was due to the stage of the gem upon transplantation, a further research was organized in order to compare 5 different plantings spaced 15 days apart as of the first decade of October. The following were compared at each planting: corms treated dry for 4 weeks at 12°C, corms dipped into water at the base, and corms with the base dipped into 100 ppm GA3 to a depth of 0.5 cm. The results show that GA3 treatment induces advanced flowering without changing the qualitative characteristics of the flowers and at any stage of the bud's maturity. In was also found that such advance is not simply due to induced rooting and stem elongation which might instead induce transplantation crisis with a resulting reduced spike yield per square meter. | |
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