Effect of Aloe vera gel coating on shelf life and quality attributes of kinnow (Citrus deliciosa Ten.)
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Date
2017
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Punjab Agricultural University, Ludhiana
Abstract
Kinnow is the major citrus fruit grown in Punjab and being perishable in nature, it cannot be
stored for long periods at ambient conditions. In the present study, the impact of Aloe vera gel
coating on quality attributes and shelf life of kinnow was assessed. Four concentrations of Aloe
vera gel and water i.e. (0:1), (1:0), (1:1), (2:1) and (3:1) with standard amount of chitosan,
pectin and glycerol (1% w/v) were utilized. Kinnow were stored at ambient and refrigerated
conditions with LDPE packaging and without packaging. Physio-chemical characteristics-
firmness, physiological weight loss, colour, TSS, titrable acidity, ascorbic acid content,
TSS/acid ratio, juice content were assessed at an interim of 7 days during storage. The
firmness, titrable acidity, ascorbic acid, juice content were gradually decreased more in case of
untreated kinnow against the Aloe vera gel coated kinnow during storage. The physiological
weight loss, colour change, TSS, TSS/acid ratio were increased during storage under ambient
and refrigerated conditions however this increase was more in untreated kinnow when
contrasted with treated kinnow. It was concluded that LDPE packed and coated kinnow had
better quality and enhance shelf life up to 77 days against the unpacked and untreated kinnow
which had 56 days of storage period under refrigerated conditions while in case of ambient
storage, LDPE packed and treated kinnow had 10 days of storage while unpacked and untreated
kinnow had just 6 days of storage life. It was inferred that Aloe vera gel coating could serve as
an alternative option to lessen the post-harvest quality losses and enhance the shelf life of
kinnow.
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