บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of different gas treatments (1-MCP and N2O) and MA on ethylene biosynthesis, ripening and quality of peaches.

Grima K., Pena A.R., Vendrell M.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.45

2004

บทคัดย่อ

Effect of different gas treatments (1-MCP and N2O) and MA on ethylene biosynthesis, ripening and quality of peaches.  Post-harvest storage of peach fruits is limited by the appearance of low temperature induced disorder, mainly internal browning and woolliness.Besides cultivar, growing and climate conditions, other factors are relevant for the appearance of these disorders.Previous studies, using different CA conditions, heat treatment, storage temperatures, were not successful for the Merry O’ Henry cultivar.Other treatments with 1-MCP, N2O and MA have been used with the purpose to see the possible role of ethylene o­n the appearance of these disorders.

Fruits were selected according to size, colour and flesh firmness and placed at 1 °C for 45 days.Part of the fruits were treated with 1 ppm of 1-MCP for 24 h, other were treated continuously with 50% N2O and other kept under MA with plastic bags.Controls were stored in air.Samples were taken at 15, 30 and 45 days storage and placed at 20 °C for 4 days.Respiration and ethylene production were monitored as well as ACC content and ACC oxidase activity.Enzymatic peroxidase and polyphenoloxidase activity were also quantified.Quality parameters were determined in pulp (pH, acidity, texture, color, soluble solids and presence of disorders).

Ethylene biosynthesis was significantly influenced by treatments, mainly 1-MCP and N2O.However, in spite of the reduction of ethylene production, no improvement was observed in fruit quality except in texture.Appearance of disorders, mainly browning, were beginning after 30 days storage in all samples, but the gas treated showed a lower development at 45 days.