EFFECTS OD WATERING FOLLOWING A DROUGHT PERIOD ON NITROGEN METABOLISM OF CUT IRIS GERMANICA FLOWERS

A period of water stress applied to cut Iris Germanica flowers results in a decrease in protein content.

After rehydration if applied before the stage when the flower bud fails to open fully on rehydration and increase in the protein content occurs within the first few hours after watering; nevertheless, the maximum protein content remains below that obtained before the water stress.

Using a double labelling technique it has been shown that the protein de novo synthesis is active only during the first few hours after watering.
After a short period, synthesis decreases and proteolysis prevails again.
Consequently, the rehydration of the flower results in an increase in the protein content which is limited in intensity and duration; the temperature of rehydration has an important effect on these phenomena.

Symposium on Postharvest Physiology of Cut Flowers

A. Paulin

https://doi.org/10.17660/ActaHortic.1975.41.1