Abstract
Superficial scald development on apples is related to preharvest environmental conditions, perhaps through effects on endogenous antioxidant concentrations In 1989 we examined effects of maturity, light, and preharvest temperatures (< 10°C) on endogenous antioxidant levels in the fruit at harvest and on scald development after long-term storage in 0°C air. Cortland apple trees were sprayed with 500 ppm ethephon 1 month before normal harvest to create maturity differences. Fruit on other Cortland trees were bagged 1 month prior to harvest to reduce light interception. Samples also were harvested from other Cortland trees after exposures to different numbers of hours < 10°C, Hours < 10°C before harvest were negatively correlated to scald development. Ethephon treatment decreased scald incidence, and bagging increased it, The total lipid-soluble antioxidant activity increased with increasing hours < 10°C and with ethephon treatment, while bagging of fruit slightly decreased this antioxidant activity. To better understand the relationships between preharvest factors and antioxidant levels, individual antioxidants, including ascorbic acid, α tocopherol, anthocyanins and glutathione, are being analyzed.
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Claims 6
Claim · model-written summary
More hours below 10°C before harvest were associated with less scald development.
Verbatim
e0“Hours < 10°C before harvest were negatively correlated to scald development”
t0“APPLES”
Claim · model-written summary
Ethephon treatment decreased scald incidence.
- Taxon
- apple
Malus domesticae1 - Material
- Cortlande1
- Treatment
- Ethephon treatmente0
- Outcome
- scald incidencee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethephon treatment decreased scald incidence”
e1“Cortland apple trees were sprayed with 500 ppm ethephon 1 month before normal harvest”
Claim · model-written summary
Bagging increased scald incidence.
Not reportedComparator
Verbatim
e0“bagging increased it”
e1“Ethephon treatment decreased scald incidence, and bagging increased it”
e2“Fruit on other Cortland trees were bagged 1 month prior to harvest”
t0“APPLES”
Claim · model-written summary
Total lipid-soluble antioxidant activity increased with more preharvest hours below 10°C.
Verbatim
e0“The total lipid-soluble antioxidant activity increased with increasing hours < 10°C”
t0“APPLES”
Claim · model-written summary
Ethephon treatment increased total lipid-soluble antioxidant activity.
- Taxon
- APPLESt0
- Treatment
- ethephon treatmente0
- Outcome
- total lipid-soluble antioxidant activitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“The total lipid-soluble antioxidant activity increased with increasing hours < 10°C and with ethephon treatment”
t0“APPLES”
Claim · model-written summary
Fruit bagging slightly decreased total lipid-soluble antioxidant activity.
- Taxon
- APPLESt0
- Treatment
- bagging of fruite0
- Outcome
- antioxidant activitye0
- Direction
- decreasede0
- Qualifier
- slightlye0
Not reportedComparator
Verbatim
e0“bagging of fruit slightly decreased this antioxidant activity”
e1“The total lipid-soluble antioxidant activity increased with increasing hours < 10°C and with ethephon treatment, while bagging of fruit slightly decreased this antioxidant activity”
t0“APPLES”
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