Rapid postharvest browning of litchi fruit pericarp is the result of polyphenol oxidase activity (Underhill and Critchley, , Jiang and Fu, , Jiang, , . Pericarp browning is the major post-harvest problem of litchi (Litchi chinensisSonn) fruit, resulting in reduced commercial value of the fruit. Mature lychee (Litchi chinensis Sonn.) fruit were heat-treated at 60C for 10 min to study heat-induced pericarp browning. Polyphenol oxidase (EC ).
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Abstract Different antioxidants and salicylic acid were tested to overcome pericarp browning and to maintain the postharvest quality of the litchi fruits at ambient storage.
Effect on relative leakage rate, polyphenol oxidase activity and anthocyanin content In this experiment, anthocyanin content of litchi fruit pericarp decreased with storage time Fig. However, these findings have given a ray of hope for further substitution of SO 2 fumigation with some non-hazardous chemicals in near future. This type of findings suggested that salicylic acid delays the browning of pericarp in litchi.
This article has been litch by other articles in PMC. Effect of pre- and postharvest salicylic acid treatment on ethylene production, fungal decay and overall quality of Selva strawberry fruit.
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Support Center Support Center. On storage, pericarp browning increased irrespective of treatments with the decrease in pericarp specific activity, total pericarp phenol and total anthocyanin. Fruits were selected for uniformity of shape, colour and size and any blemished or diseased fruits discarded.
Weight of ten fruits in a polythene bag was measured and the rate of weight loss was calculated by the following formula:. Pant University of Agriculture and Technology, Pantnagar. Received Browinng 25; Accepted Jun Salicylic acid has been found to delay the senescence of fruits Hassan et al. Effect of different post-harvest treatments on overall quality retention in litchi fruit during low temperature storage.
J Food Sci Technol. In this present study salicylic acid treatments proved best over other treatments. Lychee Litchi chinensis Sonn. Polyphenol oxidase activity PPO activity was assayed with 4-methylcatechol as a percarp according to the method of Zauberman et al.
The experiment was arranged in completely randomized design. Inhibition of ethylene biosynthesis by salicylic acid. Support Center Support Center.
However, there was no significant difference obtained between 0. The main objective of brownlng present investigation is to explore the possibility of these potential promising compounds which may replace the commercial use of SO 2 -fumigation and also to understand the various effects of these chemicals on fruit quality.
Published online May 5. Salicylic acid delay the process of senescence was also reported in pear Hassan et al. Role of anthocyanin degradation in litchi pericarp browning. Relative leakage rate denotes membrane permeability Marangoni et al.
Control of post-harvest pericarp browning of litchi (Litchi chinensis Sonn)
Though, sulphur dioxide SO 2 fumigation to the fruits has been practiced commercially to overcome pericarp browning related problems. Effect of the initial water content of pericarp. The browning of pericarp is positively correlated with the polyphenol oxidase activity Lin et al. Fruits dipped in tap water served as control. In this experiment salicylic acid had effectively reduced the browning effect, suggesting that slow rate of poly phenol oxidase activity. The fruits treated with salicylic acid had higher concentration of total soluble solid, titratable acidity and lower rate of physiological loss in weight.
Pericarp browning was not recorded up to littchi days in the litchi fruits treated with 0.
Relative leakage rate Membrane permeability expressed as relative electrolyte leakage, was determined by Jiang and Chen Data on titratable acidity, total soluble solids, TSS: Polyphenol oxidase in plants-recent progress.
The perivarp of cell wall hydrolases in fruit softening. National Center for Biotechnology InformationU. Significant control over relative leakage rate was found with the treatment 0. Author information Article notes Copyright and License information Disclaimer.