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Post harvest changes in antioxidant capacity, enzymatic activity and microbial profile of strawberry fruits treated with enzymatic and divalent ions.

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Title Post harvest changes in antioxidant capacity, enzymatic activity and microbial profile of strawberry fruits treated with enzymatic and divalent ions.
Not Available
 
Creator Kumar S
Kumar R
Nambi VE
Gupta RK
 
Subject Strawberry
Pectin methyl esterase
Storage
Total antioxidant capacity
Firmness
Microbial load
 
Description Not Available
Strawberry fruits are highly perishable and cannot
be stored for more than 1–2 days at ambient condition. Therefore,
it was thought desirable to enhance the shelf-life of
harvested strawberry using pectin methyl esterase and divalent
ions. The freshly harvested fruits of strawberry were treated
with different concentrations of pectin methyl esterase (50–
300 units) and divalent calcium ions (calcium chloride) for 5–
30 min using response surface methodology—Box–Behnken
design. The treated and untreated (control) fruits were packed
in plastic punnets and stored at two different temperature
conditions, viz., 7 °C with 80 % relative humidity (RH) and
25 °C with 60%RH, for evaluating the shelf-life. Appropriate
physico-chemical and microbiological parameters were determined
at alternate days during their storage. Overall firmness
and color values (L, a, b) decreased, while physiological
weight loss (percent) increased during their storage. No
food-borne pathogens, viz., Salmonella , Staphylococcus ,
and coliforms, were observed during storage. Total antioxidant
capacity and ferric reducing antioxidant power decreased,
while lipoxygenase and polyphenol oxidase activities
increased during storage at 7 and 25 °C. The shelf-life of
treated strawberry was found to be 10 days at 7 °C as against
6 days for control fruits under similar conditions. The treated
strawberry had shelf-life of 2 days compared to 1 day for
control maintained at 25 °C.
The work being submitted for publication is the output of project no. 8192 approved by the institute and the authors are thankful to Indian Council of Agricultural Research for research funding through institute project. Authors are also thankful to M/s Advanced Enzymes Technologies Limited, Thane, India, for providing complimentary sample of enzyme pectin methyl esterase for this research.
 
Date 2020-07-31T10:00:35Z
2020-07-31T10:00:35Z
2013-10-18
 
Type Research Paper
 
Identifier Google scholar citation: 4
1935-5130
http://krishi.icar.gov.in/jspui/handle/123456789/38684
 
Language English
 
Relation Not Available;
 
Publisher Springer