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Microbiological characterization of a regenerative life support systemA Variable Pressure Plant Growth Chamber (VPGC), at the Johnson Space Center's (JSC) ground based Regenerative Life Support Systems (RLSS) test bed, was used to produce crops of soil-grown lettuce. The crops and chamber were analyzed for microbiological diversity during lettuce growth and after harvest. Bacterial counts for the rhizosphere, spent nutrient medium, heat exchanger condensate, and atmosphere were approximately 10(exp 11) Colony Forming Units (CFU)/g, 10(exp 5) CFU/ml, 10(exp 5)CFU/ml, and 600 CFU/m sq, repectively. Pseudomonas was the predominant bacterial genus. Numbers of fungi were about 10(exp 5) CFU/g in the rhizosphere, 4-200 CFU/ml in the spent nutient medium, 110 CFU/ml in the heat exchanger condensate, and 3 CFU/cu m in the atmosphere. Fusarium and Trichoderma were the predominant fungal genera.
Document ID
19950062209
Document Type
Reprint (Version printed in journal)
Authors
Koenig, D. W. (KRUG Life Science, Houston, Texas US, United States)
Bruce, R. J. (KRUG Life Science, Houston, Texas US, United States)
Mishra, S. K. (KRUG Life Science, Houston, Texas US, United States)
Barta, D. J. (NASAJohnson Space Center Houston, Texas, US, United States)
Pierson, D. L. (NASAJohnson Space Center Houston, Texas, US, United States)
Date Acquired
August 16, 2013
Publication Date
November 1, 1994
Publication Information
Publication: Life sciences and space research 25 (3): Natural and artificial ecosystems; Meeting F4 of the COSPAR Plenary Meeting, 29th, Washington, DC, Aug. 28-Sep. 5, 1992 . A95-93759
Volume: 14
Issue: 11
ISSN: 0273-1177
Subject Category
MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
Distribution Limits
Public
Copyright
Other

Related Records

IDRelationTitle19950062160Analytic PrimaryLife Sciences and Space Research 25 (3): Natural and Artifical Ecosystems; Meeting F4 of the COSPAR Plenary Meeting, 29th, Washington, DC, Aug. 28-Sep. 5, 1992