บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Tomato fruit quality retention by 1-MCP treatments as affected by cultivar and ripening stage at harvest during storage.

Guillen F., Valverde J.M., Martinez-Romero D., Castillo S., Valero D., Serrano M.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.49

2004

บทคัดย่อ

Tomato fruit quality retention by 1-MCP treatments as affected by cultivar and ripening stage at harvest during storage.    Four tomato cultivars (‘Daniela’, ‘Patrona’, ‘Cherry’ and ‘Raf’) at two ripening stages (pink and red, for the 3 first cultivars, and breader and light pink for ‘Raf’) were treated with two 1-MCP doses (0.3 and 0.5 mL L-1).Fruit were stored at 10 °C and 90% RH for 4 weeks.Samples were weekly taken, half to study fruit quality parameters during cold storage and half left at 20 °C for 1 week (shelf life).Weit loss, colour, ethylene production, °Brix-titratable acidity raio, firmness and decay were analysed.

For all cultivars and ripening stages, the treatments were effective in reducing weight loss and rate of softening, and retarding colour changes and °Brix-titratable acidity ratio evolutions, either during cold storage or shelf life.A positive relationship could be established between 1-MCP dose and the different analysed parameters, the 0.5 mL L-1 dose being the most effective during cold storage and further shelf life.

For most cultivars and ripening stages, no reduction o­n ethylene production was detected, as a consequence of 1-MCP treatments.This might be due that in tomato fruit, the ethylene climacteric peak occurred at the breaker stage, and thus at harvest all cultivars were climacteric, and o­nly decreases in ethylene production were observed during cold storage and shelf life.However, the blockage of the ethylene receptors by 1-MCP treatment reduced the evolution of fruit quality parameters, which are considered to be controlled by this plant hormone.Also, a reduced occurrence of decay was observed for those tomato fruit treated with 1-MCP, especially for 0.5 mLL-1 1-MCP does and harvested at late ripening stage, in which almost no decay incidence during cold storage and between 2-4 fold lower during shelf life was observed.