ISHS Acta Horticulturae 218: XII African Symposium on Horticultural Crops
FLOWERING PHYSIOLOGY OF GYPSOPHILA |
| Author: | R. Moe |
| Abstract:
The effects of temperature and photoperiod on growth and flowering in Gypsophila paniculata cv. 'Bristol Fairy' were studied. The plants were grown in a phytotron at short (10 h) and long (24 h) days combined with different night temperatures (12, 18 and 24°C). In short days (SD) the plants remained vegetative and formed rosette-like plants when the night temperatures were high (18 or 24°C). At 12°C all plants flowered, but the time to visible flower buds and open flowers was delayed for 28 and 38 days, respectively, compared with long days (LD). LD and high night temperature enhanced flower initiation (lowest number of leaves below apical buds), flower differentiation and flower bud development. Increased night temperature reduced plant height and number of flower stems per plant. LD is required both for flower initiation and flower development. Low temperature treatment (12°C) of young vegetative plants for some weeks enhanced lateral branching and increased the yield of flowers. | |
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