บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Use of organic coating for maintaining fruit quality of organic avocado and mango.

Pesis E.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.87

2004

บทคัดย่อ

Use of organic coating for maintaining fruit quality of organic avocado and mango. Two organic coating for post-harvest application in fruits have been recently developed in Israel and USA.One coating is colloidal solution based o­n beeswax and the other is based o­n carnauba wax.Both organic waxes are in the product list of the Organic Materials Review Institute (OMRI) as regulated processing products.The main distinguishing feature between the two wax coatings is that beeswax coated fruit had a lustreless look, while the carnuaba wax coated fruit exhibited a shiny appearance.

Coating organic avocado and mango effectively reduced the water loss, shrinkage, chlorophyll breakdown, chilling injury symptoms and decay development in fruits, thereby, extending their shelf life.

Coating organic avocado cv. Ettinger prior to cold storage for 3 weeks at 5 °C followed by 8 days at 20 °C, retained its green peel colour and reduced chilling injury symptoms expressed as internal and external brwoning.Ripe uncoated Ettinger fruit produced signigicant amounts of acetaldehyde and ethanol, while in coated fruit these volatiles were not detected.The higher level of anaerobic volatiles was correlated with higher mesocarp discoloration.Exogenous application of ethylene for inducing faster ripening inn Ettinger did not enhance the chlorophyll breakdown in the coated fruit.The organic coating was also effective for other organic avocado cultivars like Fuerte and Hass that exhibited higher firmness, delayed breakdown and lower electrical conductivity in the fruits due to better membrane integrity.

Similarly, in the organic mango cultivars Tommy Atkins, Kent and Keitt, coating the fruits delayed fruit softening, colour development, acid breakdown and weight loss, ensuring longer shelf life of fruits after storage.Organic coating of mango fruit with natural based wax did not produce off-flavours or accumulation of anaerobic of anaerobic metabolites.Moreover, coating mango fruit reduced the internal breakdown to a great extent exhibiting better fruit texture.