Articles
FLOWER DEVELOPMENT AND FLOWERING DISORDERS IN BULBOUS IRIS
Article number
205_25
Pages
169 – 176
Language
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.
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.
Authors
A.R. Rees, E.D. Elphinstone, J.G. Atherton
Keywords
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