Effect of generally recognized as safe (GRAS) chemicals on storage behaviour of pear (Pyrus pyrifolia) cv. Patharnakh
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Date
2018
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Punjab Agricultural University, Ludhiana
Abstract
The present study entitled "Effect of generally recognized as safe (GRAS) chemicals on storage behaviour of pear (Pyrus pyrifolia) cv. Patharnakh" was carried out in the Department of Fruit Science, PAU, Ludhiana during the year 2017. Physiologically mature, uniform fruits were thoroughly washed, disinfected and dipped in aqueous solutions of boric acid (1, 2 and 3%) sodium bicarbonate (1, 2 and 3%) and sodium benzoate (1, 2 and 3%) for five minutes. The fruits were placed in CFB boxes and subsequently stored at (0-1°C and 90-95% RH) for 70 days. The fruits were analyzed after 0, 20, 40, 60 and 70 days of storage. PLW of fruits decreased with storage; however, fruits treated with boric acid @ 3% recorded significantly lower PLW as compared to other treatments. Similarly, fruit firmness, acidity, total phenolics and SOD activity showed declining trend with increase in storage period. Total soluble solids (TSS), cellulase activity and sugars were increased up to 60 days of storage and thereafter, a decline was recorded in all treatments throughout the storage period. Fruit sensory quality rating was increased upto 40 days of storage in all the treatments except control fruits where in sensory quality increased upto 20 days of storage. The TSS/acid ratio, PPO activity and spoilage increased with advancement of storage. The PME acivity was increased upto 60 days of storage in all the treatments except boric acid treated fruits in which PME activity increased upto 70 days of storage. During cold storage, boric acid @ 3% treatment was found most effective in extending the storage life of Patharnakh pear fruits with acceptable quality fruits during the entire storage period.
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