บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Quality attributes of tomatoes submitted to different postharvest treatments.

Moretti C.L., Mattos L.M., Berg F.L.N., Santos J.Z.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.47

2004

บทคัดย่อ

Quality attributes of tomatoes submitted to different postharvest treatments.  Shipping tomatoes to distant markets is always a great challenge for tomato growers in tropical countries.Delaying ripening can be a useful technique to maintain quality throughout the transportation.This work was carried out to investigate the ability of different postharvest treatments to extend the shelf life of tomatoes.

Tomato (Lycopersicon esculentum Mill.) fruit, cultivar Carmem, an extended shelf life variety (ESL), were harvested at the pink stage at commercial fields in Goias, Brazil.After harvest, fruit with no external blemishes were graded for weight (250+5 g) and diameter (6+0.5 cm), and trated with coconut grease (applied to the stem end), wrapped in plastic films (coextrused polyolephin, 18 micrometeres), 1-methylcyclopropene (1000 nL L-1), and control.Fruit were stored for 10 days under refrigerated conditions (10+0.5 °C/RH 90-95%) and every 2 days were analyzed for total soluble solids, firmness, weight loss and colour (L* a* b*).

It was verified that weight loss increased during the storage period.Control fruits and fruits treated with 1-MCP lost around 4%of their initial weight, whereas fruit treated with coconut grease in the stem end lost around 2%.Fruits stored under modified atmosphere showed less weight loss compared to other treatments.Treatment with 1-MCP delayed fruit softening.At the end of the storage period fruit treated with the ethylene antagonist had a firmness that was 50% higher than control fruit.1-MCP significantly delayed chlorophyll degradation and concomitant synthesis and revelation of carotenoids pigments.At the tenth day, 1-MCP treated fruit had a predominant green colour when compared to other treatments.Soluble solids content was not significantly affected by the different postharvest treatments.