Mohammad Zahirul Islam

Selection of Non-Perforated Breathable Film to Enhance Storability of Cherry Tomato for Modified Atmosphere Storage at Different Temperatures

This study was conducted to find out the appropriate packaging materials to extend the storability and maintain the quality of cherry tomato for modified atmosphere (MA) storage. Tomatoes were grown by hydroponic at a plastic house in Gangwon Province. Light red maturity stage tomatoes were harvested and packed with MA condition (10,000; 20,000; 40,000; 60,000; 80,000; and 100,000cc/m².day.atm O₂ permeability film) and perforated film to store at 5℃, 11℃ and 24℃. The fresh weight loss was less than 0.6% in all non-perforated breathable films at 5℃, 11℃, and 24℃, but perforated film had less than 2.93% at 5℃, 13.29% at 11℃ and 27.24% at 24℃. The 20,000cc at 5℃ and 11℃, and the 40,000cc film at 24℃ balanced optimum carbon dioxide and oxygen concentration in the package to maintain quality. The 10,000cc film was appeared the significantly highest ethylene concentration at 5℃, 11℃, and 24℃, this film had the lowest O₂ permeability. Visual quality, firmness, and soluble solids were maintained in 20,000cc films both at 5℃ and 11℃, the 40,000cc film at 24℃. There was no any trend in titratable acidity and vitamin C content of treated packed film types and temperatures at cherry tomatoes packages. Therefore, the appropriate MA condition for 5℃ and 11℃ is 20,000cc/m².day.atm O₂ permeability film; for 24℃ it is 40,000cc/m².day.atm O₂ permeability film because those films extended the storability through the firmness, soluble solids as well as visual quality.

Cherry tomato qualities affected by foliar spraying with boron and calcium

This study was conducted to investigate the effects of foliar spraying with boron and calcium on the qualities of light red maturity-stage ‘Unicorn’ cherry tomato. Increased cell -wall compactness was observed after boron (B) + calcium (Ca) treatment. The respiration rate was lowest in B + Ca-treated tomato fruits at harvest time and after storage. Firmness increased and was retained during the storage period in B + Ca treated tomato fruits. The least fresh weight loss and best shelf life were observed in B + Ca-treated tomato fruits. The vitamin C content was higher in B + Ca-treated tomato fruits than in the control. These results indicate that B + Ca treatment increases cell -wall compactness, reduces the respiration rate, reduces fresh weight loss, increases shelf life, maintains flesh firmness, and increases vitamin C content in cherry tomato.

Nutrient and salinity concentrations effects on quality and storability of cherry tomato fruits grown by hydroponic system

Bragantia, Campinas, v. 77, n. 2, p.385-393, 2018 ABSTRACT: This study was conducted to investigate the effects of nutrient and salinity concentrations on the quality of deepflow technique hydroponic system cultivated cherry tomatoes (Lycopersicon esculentum Mill ‘Unicorn’). The conditions were: (1) control (NS-1 × nutrient Solution, Electrical Conductivity – EC: 2.5 mS∙cm–1); (2) 2 × NS (2 × NS-Double NS, EC: 5 mS∙cm–1); (3) NS + 4.23 mM NaCl (NaCl-Sodium Chloride, EC: 5 mS∙cm–1); and (4) NS + 13.70 mM Sea Water – SW (EC: 7.5 mS∙cm–1). NS + 13.70 mM SW treatment showed the lowest fresh weight loss. Visual quality as well as shelf life was the longest in NS (1 × nutrient solution) treated tomato fruits. The longest POST HARVEST TECHNOLOGY Article

Combined Foliar Spray of Boron, Calcium, and Silicon can Influence Quality and Shelf Life of Cherry Tomato in Modified Atmosphere Packaging

This study was analyzed the effects of boron (B), calcium (Ca), silicon (Si) on quality and shelf life of ‘Unicorn’ cherry tomato at the light red maturity-stage. The storage conditions were modified atmosphere packaging (MAP) by oxygen transmission rate (OTR) packaging film at 5C, 11C, and 24C. Respiration and ethylene production were the lowest in B + Ca + Si -treated tomato fruits. The lowest fresh weight loss and the longest shelf life resulted from the B + Ca + Si treatment. And the firmness was enhanced by B + Ca + Si treatment at harvest time, and it was retained after storage at 5C, 11C, and 24C. Significantly lower soluble solids, lycopene, and color development were found at B + Ca + Si-treated tomato fruits compared with control after storage. Moreover, the highest titratable acidity and vitamin C content were observed in B + Ca + Si-treated tomato fruits after storage. From the above results, it was concluded that B + Ca + Si combined treatment can delay the maturity of cherry tomato after harvesting, and retained the firmness and prolong the shelf life. Additional key words : ethylene, firmness, lycopene, respiration, soluble solids, vitamin C.