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Summy Ullah ¹, S. K. Jawandha ²

Affiliations
1 Department of Fruit Science, Punjab Agricultural University, Ludhiana Punjab, IN
2 Department of Fruit Science, Punjab Agricultural University, Ludhiana Punjab, IN

Abstract

Peach fruit is highly perishable and climacteric in nature. It undergoes various physiological and biochemical changes during fruit ripening and these changes are continuous to occur after harvesting that leads to poor post-harvest fruit quality. An experiment was planned to study the effect of polyamines on the colour changes of peach fruit during low temperature storage. Physiologically mature, uniform and healthy fruits were harvested and treated for 5-minutes in aqueous solutions of spermidine, spermine and putrescine at three different concentrations viz., 1.0, 2.0 and 3.0 mmol L-1, respectively and 2.0 kg fruit from each replication of each treatment was packed in corrugated fibre board (CFB) boxes (5% perforation) with paper lining and kept at low temperature conditions (0 -1° C and 90-95% RH) for 32-days. Fruit samples were analysed after 8, 16, 24 and 32 days of storage for various physico-chemical characterstatics. Result revealed that the application of polyamines delayed the loss of green colour in peach fruits. Fruits treated with putrescine @ 3 mmol L-1 showed minimum "a" and "b" values, followed by putrescine @ 2 mmol L-1 treatment, while the maximum "a" and "b" values were recorded in untreated fruits.

Keywords

Peach, Colour, Storage, Spermidine, Spermine, Putrescine

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Summy Ullah ¹, S. K. Jawandha ¹

Affiliations
1 Department of Fruit Science, Punjab Agricultural University, Ludhiana (Punjab), IN

Abstract

Peach undergoes various ripening changes after harvest and the magnitude of post-harvest losses in fresh fruits is extraordinarily high resulting in proportionately higher economic losses than that of pre-harvest losses. An attempt was made to reduce these losses in which physiologically mature, uniform and healthy fruits of peach cv. SHAN-I-PUNJAB were harvested and treated for 5-minutes in aqueous solutions of spermidine, spermine and putrescine at three different concentrations viz., 1.0, 2.0 and 3.0 mmol L^-1 and treated fruits were packed in CFB boxes before storage at 0 to 1°C and 90-95 per cent RH for 32 days. Results revealed that post-harvest treatments of spermidine, spermine and putrescine were effective in delaying ripening and extending the post-harvest life of peach fruits under cold storage conditions. Putrescine @ 3 mmol L^-1 treatment was found most effective in decreasing physiological loss in weight (PLW) and spoilage and maintaining the high palatability, TSS: acid and total sugars at the end storage period

Keywords

Peach, Storage, PLW, Sugar, Quality, Spermidine, Spermine, Putrescine.

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