Article

Effects of delaying and shortening the new low oxygen CA combination treatment time on the storage of apples

Authors:
To read the full-text of this research, you can request a copy directly from the authors.

Abstract

We formerly reported a special lowoxygen CA combination (2 %O2 + 7. 5 %CO2) , which can control superficial scald of apples for a longer period after 4 months of treatment . Now , a further experiment of Starkrimson apples was conducted to study the effects of delayed and shortened treatment . The results showed that the scald incidence of apples of control (0 ℃, air) and conventional CA treatment (0 ℃, 3 %O2 + 3 %CO2) were 25. 6 % and 1. 02 % respectively , and their flesh firmness were 5. 79 and 6. 52 kg/ cm2 respectively after 123 days of storage. The apples of special CA treatment (10 ℃, 2 %O2 + 7. 5 %CO2) was scald2free after 123 days of storage , its flesh firmness (6. 63 kg/ cm2) was the same as that of conventional CA treatment and significantly higher than that of control . The apples of delayed treatment developed scald (6. 67 %) after 15 days of storage at 10 ℃in air and 108 days of special CA treatment , its flesh firmness (4. 8 kg/ cm2) was significantly lower than those of control and conventional CA treatment . These results indicted that it is necessary to treat apples with special CA combination on time. The scald incidence of apples of control , conventional CA treatment and special CA treatment were 46. 9 % , 36. 4 % and 0 respectively after 123 days of storage plus another 58 days of cold storage in air , their flesh firmness were 5. 28 , 5. 21 and 4. 5 kg/ cm2 respectively. The apples of special CA treatment was also scald-free after 96 days of storage plus another 50 days of cold storage in air , its flesh firmness was 4. 67 kg/ cm2 . Based on the consideration of both scald incidence and flesh firmness , it is possible to change the duration of special CA treatment from 4 months to 3. 3 months if we want to store apples for about 5 months. The formations of α-farnesene and conjugated trienes in the peels of apple fruits were significantly inhibited by special CA treatment during CA storage.

No full-text available

Request Full-text Paper PDF

To read the full-text of this research,
you can request a copy directly from the authors.

ResearchGate has not been able to resolve any citations for this publication.
Article
The storage effects of various CA treatments on Starkrimson apples at different temperatures were studied. The effect of treatment (3.5%O2+6%CO2) at 5℃was best after 182 days. The effect of treatment (2%O2+7.5%CO2) at 9℃was better after 126 days, no superficial scald among treated fruits was observed.
Article
The efficacy of low oxygen controlled atmosphere (CA) treatment combinations (2% O2 + 3, 7.5 or 12% CO2) in controlling superficial scald in apple cv. Meiguihong, a strain of Delicious, stored at 0 and 10°C, was investigated. Fruits stored at 2% O2 + 7.5% CO2 were firmer and had a higher chlorophyll content compared with those stored under control (0°C, air) conditions. However, the contents of α-farnesene and conjugated trienes of fruits stored under this CA treatment were lower than those stored under control conditions after 121 days. Thereafter, fruits stored at 10°C + 2% O2 + 7.5% CO2 were scald-free after storage in air at 20°C for 7 days or at 5-7°C for 122 days. Fruits stored at 0°C + 2% O2 + 7.5% CO2 were also scald-free after storage in air at 5-7°C for 30 days. The results indicate that suitable low oxygen CA treatment can control superficial scald of apples for a longer period after low oxygen CA storage.