Effects of chilling on the formation of secondary growing-centres in flowers of the glasshouse carnation |
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Authors: | JG Atherton GP Harris |
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Institution: | Department of Agriculture and Horticulture, University of Nottingham Gt. Britain;Department of Agriculture and Horticulture, University of Reading, ReadingGt. Britain |
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Abstract: | The incidence of secondary growing-centres within the flowers of carnation was increased when plants were chilled at 5°C for 1–3 weeks during flower development. Application of GA3 to shoots in the early stages of flower formation also caused an increase in the number of secondary growing-centres formed. Shoot tips excised from plants that had been chilled yielded greater amounts of diffusible gibberellin-like substances than shoot tips excised from plants that had been grown at normal glasshouse temperatures. It is suggested that endogenous gibberellins have a role in controlling the formation of secondary growing-centres within the flower. |
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