Articles
THE EFFECT OF PHOTOPERIOD AND TEMPERATURE ON THE DEVELOPMENT OF DUTCH IRIS FLOWERS AND DAUGHTER BULBS
Article number
177_105
Pages
613 – 618
Language
Abstract
At temperatures below 16°C, flower development to anthesis depends primarily on the light integral rather than on photoperiod.
At 16°C and above, for the same light integral, more flowers abort in longer days.
In controlled environments, photoperiod has been shown to have the major effect.
At high temperatures (16°C), more buds abort in long photoperiods (LP) than in short (SP). Daughter-bulb dry weight is also greater under LP than SP. There is evidence for a similar increase in daughter-bulb weight in plants which do not initiate a flower.
The sink strength of daughter bulbs is increased by high temperatures and LP, decreasing the proportion of successful flowers.
At 16°C and above, for the same light integral, more flowers abort in longer days.
In controlled environments, photoperiod has been shown to have the major effect.
At high temperatures (16°C), more buds abort in long photoperiods (LP) than in short (SP). Daughter-bulb dry weight is also greater under LP than SP. There is evidence for a similar increase in daughter-bulb weight in plants which do not initiate a flower.
The sink strength of daughter bulbs is increased by high temperatures and LP, decreasing the proportion of successful flowers.
Publication
Authors
E.D. Elphinstone, A.R. Rees, J.G. Atherton
Keywords
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