Postharvest Floral Organ Fall in Geraldton Waxflower (Chamelaucium-Uncinatum Schauer)

Joyce, DC (1993) Postharvest Floral Organ Fall in Geraldton Waxflower (Chamelaucium-Uncinatum Schauer). Australian Journal of Experimental Agriculture, 33 4: 481-487. doi:10.1071/EA9930481

Author Joyce, DC
Title Postharvest Floral Organ Fall in Geraldton Waxflower (Chamelaucium-Uncinatum Schauer)
Journal name Australian Journal of Experimental Agriculture   Check publisher's open access policy
ISSN 0816-1089
Publication date 1993-01-01
Year available 1993
Sub-type Article (original research)
DOI 10.1071/EA9930481
Open Access Status Not yet assessed
Volume 33
Issue 4
Start page 481
End page 487
Total pages 7
Place of publication COLLINGWOOD
Language eng
Abstract Possible reasons for, and prevention of, postharvest floral organ fall in Geraldton waxflower (Chamelaucium uncinatum Schauer) were studied. An 11-kg compression load, equivalent to the lidding of a carton, caused flower fall amounting to 1 % of the fresh mass of 420-g bunches. Fungal development also resulted in flower abscission. Healthy flowers produced little ethylene (e.g. 0.05 muL/kg.h), while infected flowers produced much more (e.g. 7.71 muL/kg.h) and were shed. Treatment with fungicide (iprodione + mancozeb) and antiethylene compounds [e.g. silver thiosulfate (STS) pulse, Purafil sorbant] reduced flowerfall in packaged flowers. Cut sprigs which suffered severe water deficit also shed flowers. In cv. Elegance, drying to -3.61 MPa elevated ethylene production (e.g. 1.35 muL/kg.h). Flowerfall induced by water deficit could be reduced by pretreatment with a STS pulse (0.5 mmol Ag+/L for 15-22 h at 0-degrees-C or 4 mmol Ag+/L for 20-30 min at about 20-degrees-C). Pretreatment with a naphthaleneacetic acid dip (50 mg/L for 1 min at room temperature) shortened the vase life of Elegance.
Keyword Water-Stress
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
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