Abstract
THE florists’ chrysanthemum exists in many forms, two of the commonest being normal double and ‘incurved'. In both, the inflorescence consists entirely, or almost entirely, of ligulate flowers, but the 'incurved’ type is distinguished from the normal ‘double’ type by the fact that in the former the corollas of the flowers constituting the mature inflorescence remain incurved. Experiments carried out here in which inflorescences of the double chrysanthemum (var. ‘Gold Standard') were sprayed with solutions of two growth substances indicate that the difference between these two types of chrysanthemum may be a simple physiological one. The two growth substances used were β-indoleacetic acid (heteroauxin) and α-naphthalene acetic acid. Aqueous solutions of these growth substances of a concentration of 0·05 per cent were sprayed on to partially opened inflorescences by means of an atomiser.
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WARNE, L. Effect of Spraying Solutions of Growth Substances on the Inflorescences of the Florists’ Chrysanthemum. Nature 140, 1065 (1937). https://doi.org/10.1038/1401065a0
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DOI: https://doi.org/10.1038/1401065a0
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