ISHS Acta Horticulturae 378: Workshop on Environmental Regulation of Plant Morphogenesis
GROWTH REGULATION OF CHRYSANTHEMUM, PELARGONIUM, BEGONIA AND KALANCHOE USING TEMPERATURE PRETREATMENT OF STOCKPLANTS |
| Author: | L.H.M. Cuijpers |
| Abstract:
The effect of temperature pre-treatments of stockplants on the elongation of cuttings was studied in three experiments during 1992 and 1993 with Kalanchoe ‘Singapore Red’, Pelargonium ‘Aphrodite’, Begonia ‘Netja’ and Chrysanthemum ‘Surf’. Effects of temperature pretreatments of stockplants were crop dependent. Internode length of Chrysanthemum was reduced with increasing stockplant temperatures, whereas internode length of Begonia and Kalanchoe was increased with increasing stockplant temperatures. In the first experiment, plant height of Pelargonium was reduced greatly by increasing stockplant temperatures. Moreover, effects of temperature pretreatment varied among the experiments. In the second experiment plant height of Chrysanthemum was hardly influenced by stockplant temperature, since temperature effects on internode length counterbalanced temperature effects on number of internodes. Temperature pretreatment of Begonia resulted in undesired elongation growth. Flower initiation of Begonia was inhibited at stockplant temperatures above 24°C, which is of interest for cutting production. | |
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