Responses of early, mid and late season apple cultivars to postharvest application of 1-methylcyclopropene (1-MCP) under air and controlled atmosphere storage conditions
Christopher B. Watkins, Jacqueline F. Nock and Bruce D. Whitaker
Postharvest Biology and Technology Vol: 19 Issue: 1 Pages: 17-32.
2000
บทคัดย่อ
The potential for commercial application of 1-methylcyclopropene (1-MCP) to
maintain quality of `McIntosh', `Empire', `Delicious' and `Law Rome' apples
under air and controlled atmosphere (CA) storage conditions was investigated.
These cultivars represent early, mid and late season apples with ripening rates
ranging from fast to slow. 1-MCP gas concentrations used were 0.5, 1 and 2 l l-1,
generated from measured amounts of Ethylbloc(TM)
powder. Fruit of each cultivar were removed from storage at 6 week intervals
during 30 weeks in air, or at 8 week intervals during 32 weeks in CA, and
evaluated after 1 and 7 days at 20°C. Effects of 1-MCP were
greater in CA than air storage. A dose response of internal ethylene
concentrations and flesh firmness to 1-MCP was found in `McIntosh' and `Law
Rome', but `Delicious' and `Empire' ripening was generally prevented by all 1-MCP
concentrations. 1-MCP reduced superficial scald incidence, and accumulations of
-farnesene
and conjugated trienols during air storage. The results indicate that the
efficacy of 1-MCP is affected by cultivar and storage conditions, and that
successful commercial utilization of the chemical will require understanding of
these relationships.