Accession Number:

ADA247456

Title:

Bacterial Responses to Extreme Temperatures and Pressures and to Heavy Organic Loading

Descriptive Note:

Final technical rept.

Corporate Author:

WASHINGTON UNIV SEATTLE

Personal Author(s):

Report Date:

1992-02-20

Pagination or Media Count:

6.0

Abstract:

The goals of this project centered around two areas of research 1 the study of hyperthermophilic archaebacteria from submarine hydrothermnal vents on the East Pacific Rise and 2 the study of physiologically diverse microbial populations associated with a whale carcass partially buried in sediments of the Santa Catalina Basin. Specific objectives included the following 1 Completion of analyses of all geochemical, biochemical and microbiological measurements made on smoker fluid samples 2 Further characterization of DNA from smoker samples and selected isolates to assess phylogenetic origin 3 Determination of upper temperature and pressure limits for growth and survival of hyperthermophilic archaebacteria 4 Tests for production of thermostable extra-cellular enzymes at extreme conditions 5 Physiological types of bacterial-invertebrate symbioses in the deep sea directly reflect available energy sources and 6 Deep-sea conditions of low temperature and elevated pressure do not limit bacterial responses to intense organic loading.

Descriptors:

• *SOURCES
• TEMPERATURE
• LOW TEMPERATURE
• PRODUCTION
• BACTERIA
• ENERGY
• INTENSITY
• HIGH PRESSURE
• POPULATION
• DEOXYRIBONUCLEIC ACIDS
• LIMITATIONS
• RESPONSE
• PHYSIOLOGICAL EFFECTS
• PRESSURE
• RANGE(EXTREMES)
• DETERMINATION
• SEDIMENTS
• MICROBIOLOGY
• DEEP OCEANS
• EAST PACIFIC RISE
• MICROORGANISMS
• VENTS
• MEASUREMENT

Subject Categories:

• Microbiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE