บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of film packaging on phytopathological and physiological processes of fresh-cut white asparagus (Asparagus officinalis L.) during postharvest.

Kadau R., Huyskens-Keil S., Goßmann M., Buttner C.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004. page 26

2004

บทคัดย่อ

Effect of film packaging on phytopathological and physiological processes of fresh-cut white asparagus (Asparagus officinalis L.) during postharvest.   Quality assurance from soil to consumer is o­ne of the predominant requests for a consumer oriented chain management.Recently, the impact of food safety and hygienic aspects has increased, specifically for pre-prepared fresh convenience-products, such as peeled asparagus (Asparagus officinalis L.).These commodities are known for their rapid physiological deterioration and contamination with microorganism.Development of pathogenic fungi is being promoted by mechanical damages and inappropriate climate regimes during postharvest handling procedures.Therefore, the appropriate climate use of film packaging in respect to product physiology and phytopathology is an essential tool for food safety strategies.In the present investigation the effect of different film packaging and postharvest temperature regimes o­n the occurrence and distribution of pathogenic microorganism and their interaction with postharvest physiological processes in wrapped peeled asparagus spears was studied during postharvest.

At the time of harvest, peeled asparagus spears were contaminated with Microdochium bolleyi (30%), Verticillium spp. (1.7%), Cladosporium spp. (1.7%), Penicillium spp. (3.3%) and Fusarium oxysporum (1.7%).After three days of storage (20 °C) the development of fungi was inhibited and o­nly Microdochium bolleyi occurred to 13.3% and 6.6% in P-Plus-film and PP-film wrapped spears, respectively.Oxygen concentration within the packaging unit decreased from 21% to 8.5% in P-Plus-film and to 0.2% in PP-film.During storage, glucose (mg g-1 DW) decreased to a larger extent in PP-film packaging.

It is concluded that the development of pathogenic microorganisms was inhibited by the gaseous composition within the film packaging unit and/or by the limited source of carbohydrates.Furthermore, it is assumed the Microdochium bolleyi revealed a better adaptation to varying physiological conditions in postharvest.