ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Dynamics and variability of bacterial population density on leaves of field-grown endive destined for ready-to-use processing.

Morris, C. E.; Lucotte, T.;

International Journal of Food Science & Technology Year: 1993 Vol: 28 Issue: 2 Pages: 201-209 Ref: 17 ref.

1993

บทคัดย่อ

To quantify the variability and dynamics of bacterial populations on field-grown broad-leaved endive cv. Samy, plants were sown at 3 dates in 1990 for cultivation during the autumn season in southern France. Densities of populations of total, Pseudomonas fluorescens and pectolytic Gram negative bacteria were determined for entire seedlings in the greenhouse and for outer and inner leaves of plants in the field throughout the season until harvest. On seedlings from the greenhouse, bacteria were always detected but fluorescent and pectolytic bacteria were only sporadically detected and generally composed <0.1% of the total population. In the field there were significant differences in total, fluorescent and pectolytic bacterial populations on outer and inner leaves, among different plants of the same age, and among inner leaves sampled at the 3 different dates of harvest. The variability observed suggests that it is reasonable to pursue development of cultural or industrial sorting methods to reduce the microbial load of endive destined for ready-to-use processing.