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Syzygium cumini Skeels, commonly known as jamun, is an under-utilized fruit crop, native to India. The fruit is rich in several bioactive compounds and possesses several medicinal properties, especially therapeutic effects towards healing diabetes. However, the fruit deteriorates rapidly after harvest and can only be stored for 2–3 days at ambient conditions. Therefore, the present study was conducted to extend the storability and preserve jamun fruit quality during storage at ambient conditions. Fully ripe jamun fruits were immersed in salicylic acid (SA, 1.0 mM or 1.5 mM) or chitosan (1.5% w/v) solutions either alone or in combination. Fruits dipped in distilled water served as control. Following treatments, fruits were dried in air and stored at room temperature in corrugated fibre board boxes. The results indicated that 1.5% chitosan + 1.5 mM SA treatment was highly effective in preserving fruit quality and delaying senescence. This treatment resulted in about 19.5% lower weight loss, 49.9% lower decay loss, and 48% lower malondialdehyde content than control fruit. Combined treatment of chitosan and SA (1.5 mM) retained about 1.34-fold higher total anthocyanins, 1.69-fold higher total phenolics, 1.5-fold higher total flavonoids, 1.75-fold higher total antioxidant capacity, and 1.5-fold higher radical scavenging activity than control up to 6 day storage. Significant variations in ascorbic acid and titratable acidity were not recorded among salicylic acid-treated and chitosan-coated fruits; however, total soluble solids content was highest in chitosan-coated fruits. The findings of the study will be useful to increase the availability of jamun fruit and enable for its long-distance transport and subsequent marketing.
Sapota is cultivated in many countries of tropical and subtropical climate. It is delicious, nutritive, and commercially grown mainly for fresh consumption. Postharvest life of sapota is very short due to its highly perishable nature and other many reasons such as quick ripening, faster senescence, rapid loss of moisture, microbial spoilage, and fruit sensitivity to cold storage. To maintain and/or increase the shelf life of sapota, proper postharvest management is required. Unfortunately, very little work has been done so far, with limited success, leaving scarce literature published on postharvest management technologies of sapota. Different pre and postharvest treatments to reduce metabolic activity and quality loss have been suggested. Moreover, proper storage temperature and packaging may be used to increase the shelf life of fruits. This review explores the postharvest technologies adopted to enhance the shelf life of sapota during storage and distribution channel.
Cauliflower curd has a relatively short postharvest life and develops unpleasant odour and browning within a short period. A few low-temperaturelinked attempts, with limited success, have been made. However, in most of the countries, it is not stored under cold temperature at practical levels. On the other hand, no study has been carried out to assess the senescence-related changes in cauliflower during postharvest storage. In this study, fresh cauliflower curds were treated with 6-benzylaminopurine (BAP) at three concentrations (100, 200, or 300 ppm w/v) and its effects on lipid peroxidation, membrane integrity, bioactive molecules, antioxidant activity, soluble sugar, etc. were observed during storage at ambient conditions. BAP profoundly delayed lipid peroxidation and loss of membrane integrity of the tissue, which was associated with the ageing and senescence processes. A positive effect of BAP on maintaining higher bioactive molecules (ascorbic acid and total phenols), antioxidant activity, and soluble sugar was also observed, which was decreased in control curds. A correlation among different quality parameters was also calculated. The results suggested that the maximum storability period for control curds was 6 days, while BAP treated (200 and 300 ppm) curds could be stored with optimal quality and enhanced antioxidant activity up to 12 days at 25 °C.
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