Journal
FOOD CHEMISTRY
Volume 346, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.128934
Keywords
Pear cold storage; Nitric oxide donor; Respiration rate; Sensory quality; Enzyme activity
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Sodium nitroprusside (SNP) was found to effectively reduce quality loss, retain color and firmness, suppress browning and respiration rate, and sustain nutrient content in stored pear fruit. Additionally, SNP treatments also inhibited the activity of fruit softening enzymes and prolonged the storability and sensory quality of pear fruit.
Quality loss in pear fruit during storage reduces its marketability for long run. To increase its storability, the efficacy of postharvest dip treatment donor sodium nitroprusside (SNP) 0.000, 0.001, 0.002 and 0.003 mol L-1 were investigated on pear fruit cv. Patharnakh under storage conditions (low temperature 0-1 degrees C and relative humidity (90-95%). SNP effectively lowered fruit mass loss, retained colour and higher firmness, suppressed browning and respiration rate and sustained soluble solids content, titratable acidity, total phenol content and ascorbic acid thus conserved the fruit quality for longer period. SNP treatments suppressed the activity of polyphenol oxidase and increased activity of superoxide dismutase enzyme. Additionally, the SNP treated fruit exhibited lesser activities of fruit softening enzymes like pectin methylesterase, polygalacturonase and cellulase. Among all, 0.002 mol L-1 SNP concentration was superior to lengthen storability and sensory quality of pear up to 60 d under cold storage.
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