Inhibition of ethylene action by 1-methylcyclopropene extends postharvest life of Bartlett pears
G. D. Trinchero, G. O. Sozzi , F. Covatta and A. A. Fraschina
Postharvest Biology and Technology Volume 32, Issue 2 , May 2004, Pages 193-204
2004
บทคัดย่อ
Inhibition of ethylene action by 1-methylcyclopropene extends postharvest life of
Preclimacteric European pears (
Pyrus communis L. cv. "Bartlett") were untreated or treated with 0.4
ml l
-1 1-methylcyclopropene (1-MCP) for 10 h at 20 °C and then kept at 20 °C, or stored at 1 °C for 30 or 60 days before transfer to 20 °C. Other lots were treated with 0.4, 0.8, 1.2, or 1.6
ml l
-1 1-MCP after 30 or 60 days of storage at 1 °C. 1-MCP-treated pears kept at 20 °C had lower ethylene production and slower softening than untreatedfruit.Treatedfruitwere more than 75 N firmer than controlfruitafter a 6 day storage period.Fruitcolor changes were also delayed by 1-MCP treatment. However, additional color sorting may be necessary to reduce variability in response offruitto 1-MCP in commercial situations. 1-MCP-treatedfruithad lower total glycosidase (
a- and
b -D-galactosidase,
a-L-arabinofuranosidase,
b -D-xylosidase, and
b -D-glucosidase) activities. When 1-MCP was applied tofruitprior to cold storage (CS) at 1 °C, the synergistic interaction of cold and 1-MCP resulted in an extendedpostharvestlife after transfer to room temperature, with concomitant delayed ethylene and respiratory level increases, retarded color development and retention of firmness. In contrast, application of 0.4–1.6
ml l
-1 1-MCP after 30 or 60 days of cold storage did not affect most ripening indices. These findings point to the experimental and commercial utility of 1-MCP in "Bartlett" pearpostharvestmanagement