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Tolerance of controlled atmosphere storage of cut Fraser fir and its respiration rate in air.

Blankenship, S. M. and Hinesley, L. E.

HortScience Year: 1990 Vol: 25 Issue: 8 Pages: 941-943 Ref: 12 ref.

1990

บทคัดย่อ

Tolerance of controlled atmosphere storage of cut Fraser fir and its respiration rate in air.

Cut Abies fraseri branches taken in autumn, winter or early spring were held at 5 deg C for 4-6 weeks in nitrogen atmospheres containing 1 or 3% O2 or in air containing 1, 5, 10, 20, 40 or 50% CO2 or in normal air. CO2 concentrations less than or equal to 5% accelerated needle loss. There was considerable variation between individual trees in tolerance of higher than ambient CO2 concentrations. Branches died in 1% O2, but, in 3%, they behaved as in air alone. The initial dark respiration rate at 21 deg was about 4 times higher than that at 5 deg . Respiration decreased for approximately 10 d and stabilized at 14-20% of the initial values. Respiration increased exponentially as temperature increased after storage from 5 deg to 27 deg . It is concluded that short-term controlled or modified atmosphere storage would not improve postharvest handling of A. fraseri cut foliage.