บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Cellulose-based coatings as carriers for Candida guillermondii and Debaryomyces sp. in reducing decay of oranges.

Potjewijd, R.; Nisperos, M. O.; Burns, J. K.; Parish, M.; Baldwin, E. A.;

HortScience Year: 1995 Vol: 30 Issue: 7 Pages: 1417-1421 Ref: 25 ref.

1995

บทคัดย่อ

Cellulose-based coatings as carriers for Candida guillermondii and Debaryomyces sp. in reducing decay of oranges.

 

Varying the cellulose component of coating formulations affected the survival of 2 yeast biocontrol agents, C. guillermondii strain US7 and Debaryomyces sp. strain 230, when these yeasts were incorporated into the coating. Using methylcellulose as the main film-former gave the most recovery of the yeasts after an incubation period for both strains. Significant control of decay on naturally infected Pineapple and Valencia oranges was demonstrated for US7 in a methylcellulose-based coating for the first 2-4 weeks of storage at 16 deg C and 90% RH. During this time, US7 in methylcellulose formulations was similar in decay control to a commercial shellac coating with imazalil at 2000 mg/litre. A US7 concn of at least 105 c.f.u./cm was maintained on the coated fruit surface of Valencia oranges for 3 weeks of storage. Suppression of decay by US7 was improved by the addition of glucose and calcium chloride. Although nearly equal in concn recovered, Debaryomyces strain 230 was not as effective as US7 in

 disease suppression of Pineapple. The addition of US7 to Nature Seal, a coating material made with methylcellulose, had neither a quantitative nor a qualitative effect on the pathogen population compared with the same formulation without the antagonist.