This experiment was conducted to evaluate the effect of chitosan coating on physiological responses and nutritional qualities of tomato fruits at postharvest storage. There were four treatments of chitosan viz. T0 (control), T1 (0.10%), T2 (0.20%) and T3 (0.30%), and two storage conditions viz. in refrigerator (4°C) and room temperature (≈23-25°C). The matured light yellow tomato fruit samples were collected at 10, 20, 30 and 50 days after postharvest storage to assess physiological parameters viz. shelf life and weight loss as well as to determine lycopene and mineral constituents viz. Ca, Mg, P, S, Na and K. The mean weight loss of tomato fruits were 0.64, 1.28, 1.59 and 2.28% at 4°C, while it was 0.88, 1.84, 2.60 and 4.80% at room temperature at 10, 20, 30 and 50 days after postharvest storage, respectively. The shelf life of tomato fruits ranged between 58.3-100.0, 50.0-100.0, 33.3-75.0 and 16.7-66.8% at 4°C, while the ranges were 66.8-100.0, 50.0-100.0, 33.3-75.0 and 0.0-41.8% at room temperature at 10, 20, 30 and 50 days after postharvest storage, respectively. As regards to weight loss and shelf life, the study results inferred that chitosan coating with 0.2% solution is useful at postharvest storage of fruits. The study results revealed that storage temperatures (4°C and ≈23-25°C) had no effect on the total contents of different mineral element of tomato fruits but lycopene content reduced almost twice at refrigerated condition. On the other hand, the effect of chitosan coating on Ca, Mg, P, S, Na and K contents of tomato fruits at different days after postharvest storage were highly significant at both conditions. Finally, the study results concluded that 0.2% chitosan based coatings in tomato fruits proved to extend the shelf life by decreasing the decay incidence and weight loss, and refrigerated condition is better than that of room temperature.
A pot experiment was conducted to study the effect of different application methods of chitosan on growth, yield and quality of tomato (Lycopersicon esculentum Mill.). The experiment was laid out in completely randomized design (CRD) with four replications and twelve treatments combinations viz.
Bangladesh is a lower middle-income country with over 160 million population (The World Bank, 2015). The diet quality of a large proportion of this population is very poor (Debashis et al., 2019). The usual diet is heavily dependent on rice. Though rice is not a good source of protein, it constitutes about half of the total protein consumption in the diet (Hassan, 2010). However, according to the Bangladesh household income and expenditure survey, the per capita fruit and vegetable consumption in the country is 210.8 g/day (166.1 g vegetables and 44.7 g fruit), which is much less than the minimum average requirement of 400 g/day; it indicates a poor dietary status in Bangladesh (Bangladesh Bureau of Statistics, 2010).A basic limitation of the balanced diet is the lack of dietary diversity. Thus, consumption of a diversified diet needs to be promoted to meet the needs of micronutrients where fruits and vegetables are the rich source of dietary diversity.The contribution of fruits and vegetables remains extremely important for ensuring food and nutritional security in Bangladesh.The tropical and subtropical climates blessed the country with a variety of fruits and vegetables. Unfortunately, due to postharvest losses, a significant share of the harvested produce never reaches
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