บทคัดย่องานวิจัย

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Aspects of carbohydrate balance during floret opening in Freesia.

Meeteren, U. van; Gelder, H. van; Peppel, A. C. van de;

Acta Horticulturae Year: 1995 Issue: No. 405 Pages: 117-122 Ref: 13 ref.

1995

บทคัดย่อ

Aspects of carbohydrate balance during floret opening in Freesia.

 

Endogenous carbohydrates were investigated during development of florets of Freesia hybrida cv. Polaris in inflorescences attached to the plant as well as in cut inflorescences placed in water. During development on the plant the amount of glucose, fructose and sucrose increased about 15-20 times; the peak was reached at anthesis. For detached inflorescences, at anthesis the amount of sugars in the 5th floret (from the base of the inflorescence) was only about 20% that in the attached inflorescences. However, opening of these florets was usual. Starch hydrolysis could not account for all the increase in sugars during bud development on cut inflorescences. Decreasing the stem length of cut inflorescences greatly reduced the increase in DW and total carbohydrates in the buds. However, there stem length had no influence on the number of flowering florets/inflorescence. It is not certain whether variations in flowering percentage in cut flowers placed in water are correlated with differences in endo

genous carbohydrates.