ISHS Acta Horticulturae 177: IV International Symposium on Flower Bulbs
EFFECT OF VARIOUS CORM TREATMENTS ON FLOWERING OF LIATRIS SPICATA WILLD. |
| Authors: | R. Moe, M. Berland |
| Abstract:
Increasing duration of cooling of the dormant corms promoted flowering and reduced the time to flowering. Cold storage at 0° resulted in earlier flowering and a higher number of flower shoots per corm compared with 5°C. Gibberellic acid (GA3) application (500 ppm) enhanced flower development and amount of flower shoots. The effect of GA3 was most pronounced for unsufficient cooled corms. Application of GA3 before start of cooling seemed to be most favourable. GA3 og GA3 plus BA (benzyl adenine) treatments before planting interacted with the photoperiod during forcing. In short days (SD, 10 h) the GA3 or GA3 + BA significantly reduced the days to flowering and increased the number of flower shoots per corm, while in long days (LD, 24 h) the growth regulators had a small effect. In SD GA3 also reduced the number of leaves, but not in LD. | |
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