ISHS Acta Horticulturae 205: Symposium on the Development of New Floricultural Crops, XXII IHC
FLOWER DEVELOPMENT AND FLOWERING DISORDERS IN BULBOUS IRIS |
| Authors: | A.R. Rees, E.D. Elphinstone, J.G. Atherton |
| Abstract:
Flowering failure in bulbous iris 'Wedgwood' was examined in plants given several pre-planting temperatures and transfers between temperatures to produce a range of morphologically different plants. Correlations were determined between growth of flower plus stem and several measures of vegetative growth. Successful flowering was associated with extensive vegetative development and rapid vegetative growth. A similar effect was also obtained with post-planting interactions of temperature and light treatments. Bulbing was promoted by high temperature and by long photoperiods, to the detriment of flowering. These results are explained in terms of internal competition for mother-bulb reserves and photosynthates from the leaves which lead to flower failure if assimilation is low and if competition from daughter bulbs is intensified by temperature or photoperiod. | |
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