Abstract
Fruits have self defense mechanisms to protect from oxidative stress by the activation of many antioxidant defense enzymes like superoxide dismutase (SOD), catalase (CAT) and peroxidase (POX). The development of oxidative stress in fruit mainly depends upon its cellular antioxidant levels, physical atmosphere of the fruit and its postharvest handling. The present investigation was carried out to study the effect of post harvest pre-cooling and heat treatments on antioxidant enzymes, CAT, POX andSOD involved in detoxification of reactive oxygen species (ROS) were measured in mango var. Alphonso and banana var. Robusta. Increased CAT and POX activities in mango and banana during heat treatment followed by cooling at 8 ºC or 13 ºC indicated increased elimination of ROS. Pre-cooling of mango at 8 ºC showed twofold decreased CAT activity in the pulp whereas heat treatment to mango followed by cooling at 8 ºC and 13 ºC recorded 2.2 fold increased CAT activity. Pre-coolingtreatment reduced POX activity whereas heat treatment followed by cooling resulted in decreased SOD activity. CAT activity after pre-cooling to 13 ºC by using precooled air was similar to that of control. In banana, pre-cooling treatment (8 ºC) and heat treatment followed by cooling reduced CAT activity in peel and pulp, whereas POX activity increased. Pre-cooling and heat treatments altered normal homeostasis of these fruits, which were reflected by changes in the levels of antioxidant enzymes- CAT, POX and SOD. Visual assessment of mango and banana fruits after pre-coolingat different temperatures (5 ºC, 8 ºC and 13 ºC) did not show any chilling injury (CI) symptoms. Similarly, application of postharvest quarantine heat treatment (52-55 °C) for 5 minutes to mango showed no heat injury (HI) symptoms like skin scalding, damaged lenticels which could be due to very short duration of exposure. Extent of recommendation of pre-cooling temperature and heat treatment of these fruits after pre-cooling at 5 ºC and 8 ºC can be made based on the levels of reactive oxygenspecies. The present study showed that the level of expression of antioxidant enzymes got affected during pre-cooling (5 ºC and 8 ºC) and quarantine heat treatment (52-55 °C). Therefore, findings of the present study serve as basic information about cellular homeostasis in the mango and banana.
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Claims 13
Claim · model-written summary
Heat treatment followed by cooling increased CAT and POX activities in mango.
- Taxon
- mango
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Mangifera indicae0 - Treatment
- heat treatment followed by cooling at 8 ºC or 13 ºCe0
- Outcome
- CAT and POX activitiese0
- Direction
- Increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_from_India.jpg?width=500)
Verbatim
e0“Increased CAT and POX activities in mango and banana during heat treatment followed by cooling at 8 ºC or 13 ºC indicated increased elimination of ROS”
Claim · model-written summary
Heat treatment followed by cooling increased CAT and POX activities in banana.
- Taxon
- bananae0
- Treatment
- heat treatment followed by cooling at 8 ºC or 13 ºCe0
- Outcome
- CAT and POX activitiese0
- Direction
- Increasede0
Not reportedComparator
Verbatim
e0“Increased CAT and POX activities in mango and banana during heat treatment followed by cooling at 8 ºC or 13 ºC indicated increased elimination of ROS”
Claim · model-written summary
Pre-cooling of mango at 8 ºC twofold decreased CAT activity in the pulp.
- Taxon
- mangoMangifera indicae0
- Treatment
- Pre-cooling of mango at 8 ºCe0
- Outcome
- CAT activity in the pulpe0
- Direction
- decreasede0
- Value
- twofolde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pre-cooling of mango at 8 ºC showed twofold decreased CAT activity in the pulp”
Claim · model-written summary
Heat treatment of mango followed by cooling at 8 ºC and 13 ºC increased CAT activity 2.2 fold.
- Taxon
- mangoMangifera indicae0
- Treatment
- heat treatment to mango followed by cooling at 8 ºC and 13 ºCe0
- Outcome
- CAT activitye0
- Direction
- increasede0
- Value
- 2.2 folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat treatment to mango followed by cooling at 8 ºC and 13 ºC recorded 2.2 fold increased CAT activity”
Claim · model-written summary
Pre-cooling reduced POX activity in mango and banana.
Not reportedComparator
Verbatim
t0“antioxidant enzymes profile of mango and banana”
e1“Pre-coolingtreatment reduced POX activity”
Claim · model-written summary
Heat treatment followed by cooling decreased SOD activity in mango and banana.
- Taxon
- mango and bananat0
- Treatment
- heat treatment followed by coolinge1
- Outcome
- SOD activitye1
- Direction
- decreasede1
Not reportedComparator
Verbatim
t0“antioxidant enzymes profile of mango and banana”
e1“heat treatment followed by cooling resulted in decreased SOD activity”
Claim · model-written summary
CAT activity after pre-cooling to 13 ºC with precooled air was similar to the control in mango and banana.
Verbatim
t0“antioxidant enzymes profile of mango and banana”
e2“CAT activity after pre-cooling to 13 ºC by using precooled air was similar to that of control”
Claim · model-written summary
Pre-cooling at 8 ºC reduced CAT activity in banana peel and pulp.
- Taxon
- bananae0
- Treatment
- pre-cooling treatment (8 ºC)e0
- Outcome
- CAT activity in peel and pulpe0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“In banana, pre-cooling treatment (8 ºC) and heat treatment followed by cooling reduced CAT activity in peel and pulp, whereas POX activity increased”
Claim · model-written summary
Heat treatment followed by cooling reduced CAT activity in banana peel and pulp.
- Taxon
- bananae0
- Treatment
- heat treatment followed by coolinge0
- Outcome
- CAT activity in peel and pulpe0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“In banana, pre-cooling treatment (8 ºC) and heat treatment followed by cooling reduced CAT activity in peel and pulp, whereas POX activity increased”
Claim · model-written summary
Pre-cooling at 8 ºC and heat treatment followed by cooling increased POX activity in banana.
- Taxon
- bananae0
- Treatment
- pre-cooling treatment (8 ºC) and heat treatment followed by coolinge0
- Outcome
- POX activitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“In banana, pre-cooling treatment (8 ºC) and heat treatment followed by cooling reduced CAT activity in peel and pulp, whereas POX activity increased”
Claim · model-written summary
Pre-cooling at 5, 8 and 13 ºC did not cause chilling injury symptoms in mango and banana fruits.
- Taxon
- mango and bananae0
- Treatment
- pre-cooling at different temperatures (5 ºC, 8 ºC and 13 ºC)e0
- Outcome
- chilling injury (CI) symptomse0
Not reportedComparatorDirection
Verbatim
e0“Visual assessment of mango and banana fruits after pre-cooling at different temperatures (5 ºC, 8 ºC and 13 ºC) did not show any chilling injury (CI) symptoms”
Claim · model-written summary
Postharvest quarantine heat treatment at 52-55 °C for 5 minutes did not cause heat injury symptoms in mango.
- Taxon
- mangoMangifera indicae0
- Treatment
- postharvest quarantine heat treatment (52-55 °C) for 5 minutese0
- Outcome
- heat injury (HI) symptomse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of postharvest quarantine heat treatment (52-55 °C) for 5 minutes to mango showed no heat injury (HI) symptoms”
Claim · model-written summary
The authors recommend that the pre-cooling temperature and heat treatment be chosen from the reactive oxygen species levels after pre-cooling at 5 ºC and 8 ºC.
Verbatim
t0“antioxidant enzymes profile of mango and banana”
e1“Extent of recommendation of pre-cooling temperature and heat treatment of these fruits after pre-cooling at 5 ºC and 8 ºC can be made”
The same questions in other papers
heat · crop injury · Mangifera indica (mango)Results differ
2 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
11 papers more in this group
See all 15 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.