บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Postharvest floral organ fall in Geraldton waxflower (Chamelaucium uncinatum Schauer).

Joyce, D. C.;

Australian Journal of Experimental Agriculture Year: 1993 Vol: 33 Issue: 4 Pages: 481-487 Ref: 28 ref.

1993

บทคัดย่อ

Postharvest floral organ fall in Geraldton waxflower (Chamelaucium uncinatum Schauer).

Possible reasons for, and prevention of, postharvest floral organ fall in C. uncinatum (various cultivars) were studied. An 11-kg compression load, equivalent to the force required to close the lid of a carton, caused flower fall amounting to 1% of the FW of 420-g bunches. Fungal infection also resulted in flower drop; healthy flowers produced little ethylene, while infected flowers produced much more (e.g. 0.05 vs. 7.71 mu l/kg per h, respectively) and were shed. Treatment with fungicides (iprodione + mancozeb) and antiethylene compounds (e.g. silver thiosulphate, STS) reduced flower drop in packaged flowers. Severe water deficit caused by drying also caused flower shedding. Flower drop induced in cv. Elegance by water deficit was reduced by pretreatment with an STS pulse (0.5 mmol Ag+/litre overnight at 0 deg C or 4 mmol Ag+/litre for 20-30 min at approx equal to 20 deg ). Pretreatment with an NAA dip (50 mg/litre for 1 min at room temperature) shortened the vase life of cv. Elegance flowers from 13.0 days in controls to 7.5 days.