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Response of selected microorganisms to experimental planetary environmentsResults are presented on the anaerobic conversion of phosphite to phosphate. It is demonstrated that in the presence of both phosphite and hypophosphite, the phosphite is the preferred phosphorous source. An investigation in which P-32 labeled hypophosphite was added to the basal medium demonstrates that the labeled hypophosphite was incorporated into the metabolic reactions of the cell. Other data show that as cell growth occurs, the phosphite and/or hypophosphite levels decrease. The Bacillus sp. capable of anaerobic utilization of phosphite was isolated from Cape Canaveral soil samples, and it is partially characterized. Also included are continued investigations of omnitherms. The data presented show that some of these possess significant resistance to the Viking dry-heat cycle, and that they retain their omnithermic characteristic after recovery from the heat cycle. Other physiological characteristics of these isolates are also presented. It is demonstrated that omnitherms can be isolated from Cape Canaveral soil.
Document ID
19760025736
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Foster, T. L. (Hardin-Simmons Univ. Abilene, TX, United States)
Winans, L., Jr. (Hardin-Simmons Univ. Abilene, TX, United States)
Date Acquired
September 3, 2013
Publication Date
August 1, 1976
Subject Category
Life Sciences (General)
Report/Patent Number
SAPR-8
NASA-CR-148833
Accession Number
76N32824
Funding Number(s)
CONTRACT_GRANT: NGR-44-095-001
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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