บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of 1-MCP on Abbe Fetel pears sorted at harvest by time-resolved reflectance spectroscopy.

Eccher Zerbini P., Cambiaghi P., Grassi M., Rizzolo A., Cubeddu R., Pifferi A., Torricelli A., Biscotti G.

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

2004

บทคัดย่อ

Effect of 1-MCP on Abbe Fetel pears sorted at harvest by time-resolved reflectance spectroscopy.   Abbe Fetel pears, with long term storage in normal atmosphere (NA), lose their ripening ability, remaining firm and grainy, while in controlled atmosphere (CA) they are very sensitive to low oxygen, which cause soft senescent scald.1-Methylcyclopropene (MCP) is an inhibitor of ethylene action, but its effectiveness and dose response in pears seems to be related to fruit maturity.Time-Resolved Reflectance Spectroscopy (TRS) is a new non destructive method, by which the two optical properties of absorption and scattering at selected wavelengths can be measured in diffusive media.TRS has been successfully used to select fruits as regards degree of maturity at harvest.Aim of the research was to assess the effect of different doses of MCP applied o­n pears of different maturity, as selected by means of TRS, in order to determine the right dose for each maturity stage.

Abbe Fetel pers were picked o­n 1 September 2003, analysed with TRS, ranked by decreasing absorption at 670 nm (ma670) and divided into two ma670 classes (high and low).Fruits in each class were randomized between the MCP (0, 100 and 300 ml/l) and storage (-0.5 °C, NA or CA 2% O2 + 0.7% CO2) treatments.MCP was applied o­n the day after harvest at –0.5 °C for 30 h in gastight containers.Analyses of fruit mass, colour, firmness, soluble solids (s.s.) and titratable acidity were carried out at harvest and will be repeated, together with ethylene production rate, after 4 and 6 months’ storage and during shelf life.At harvest, fruit in the high ma670 (i.e. less mature) class had lower mass and s.s. and higher acidity, starch and firmness.A significant correlation was found between ma670 and s.s., acidity and mass.Results after storage will be repotred.