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Appl Environ Microbiol. 1975 June; 29(6): 780-781
Copyright © 1975 American Society for Microbiology. All Rights Reserved.

Microflora and Invert Sugars in Juice from Healthy Tissue of Stored Sugarbeets¹

Agricultural Research Service, U.S. Department of Agriculture, North Dakota Agricultural Experiment Station, North Dakota State University, Fargo, North Dakota 58102

ABSTRACT

Bacterial populations increased in juice of healthy tissue of sugarbeet roots stored at 5 C. Average counts showed a sixfold increase after 150 days of storage. Invert sugar levels increased over threefold in "American 4 Hybrid A" and remained fairly constant in "Mono-Hy D-2." The former cultivar also had significantly higher bacterial colony counts than the latter before 90 days of storage. Of 36 isolates identified, 16 were Pseudomonas spp. including P. chlororaphis; 6 Bacillus spp. including B. subtilis; 5 Arthrobacter spp. including A. globiformis; 4 yeasts; 2 Erwinia spp.; 2 Flavobacterium spp. including F. aquatile; and Streptomyces longisporus. Isolates of all genera except S. longisporus were able to hydrolyze sucrose in vitro.

¹ Cooperative investigations of the Agricultural Research Service and North Dakota Agricultural Experiment Station. Published with the approval of the Director of the North Dakota Agricultural Experiment Station as Journal Article no. 535.