Abstract
The activities of the acid and alkaline inorganic pyrophosphatases (EC.3.6.1.1) were determined in the petals of cut flowers of roses (Rosa hybrida L.), carnations (Dianthus caryophyllus L.,) and chrysanthemums (Chrysanthemum morifolium (Ramat.)) kept either in water or in solutions of a flower preservative, and in flowers kept uncut on plants. The use of flower preservative decreased the activity of both pyrophosphatases in roses, did not change it in chrysanthemums, and maintained the alkaline enzyme at essentially the initial level in carnations. The activities of both enzymes were generally greater in the flowers of carnations and chrysanthemums than in roses, excepting the acid pyrophosphatase in uncut chrysanthemums on day 15, or the alkaline pyrophosphatase on days 15 and 17. The activities of both enzymes were essentially similar for each kind of flower indicating that their effect on anabolism or catabolism in flower petals was minimal.
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