Physiology and microbial community structure in soil at extreme water content

A sandy loam soil was brought to 6 water contents (13-100% WHC) to study the effects of extreme soil moistures on the physiological status of microbiota (represented by biomass characteristics, specific respiration, bacterial growth, and phospholipid fatty acid, PLFA, stress indicators) and microbia...

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Bibliographic Details
Published in:Folia microbiologica 2005-01, Vol.50 (2), p.161-166, Article 161
Main Authors: Uhlírová, E, Elhottová, D, Tríska, J, Santrůcková, H
Format: Article
Language:English
Subjects:
Actinobacteria - growth & development
Actinobacteria - isolation & purification
Actinomycetes
Bacteria
Bacteria - classification
Bacteria - growth & development
Bacteria - isolation & purification
Biological activity
Biomass
Community structure
Ecosystem
Fatty acids
Fatty Acids - analysis
Gram-Negative Bacteria - growth & development
Gram-Negative Bacteria - isolation & purification
Gram-Positive Bacteria - growth & development
Gram-Positive Bacteria - isolation & purification
Indicators
Microbial activity
Microbiology
Microbiomes
Microbiota
Microorganisms
Moisture content
Nutrient deficiency
Oxygen Consumption
Phospholipids
Phospholipids - analysis
Physiological effects
Physiology
Poly-3-hydroxybutyrate
Polyhydroxybutyric acid
Sandy loam
Sandy soils
Saturated soils
Soil - analysis
Soil conditions
Soil Microbiology
Soil moisture
Soil structure
Soil water
Water - analysis
Water content
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Summary:A sandy loam soil was brought to 6 water contents (13-100% WHC) to study the effects of extreme soil moistures on the physiological status of microbiota (represented by biomass characteristics, specific respiration, bacterial growth, and phospholipid fatty acid, PLFA, stress indicators) and microbial community structure (assessed using PLFA fingerprints). In dry soils, microbial biomass and activity declined as a consequence of water and/or nutrient deficiency (indicated by PLFA stress indicators). These microbial communities were dominated by G+ bacteria and actinomycetes. Oxygen deficits in water-saturated soils did not eliminate microbial activity but the enormous accumulation of poly-3-hydroxybutyrate by bacteria showed the unbalanced growth in excess carbon conditions. High soil water content favored G bacteria.
ISSN:0015-5632
1874-9356
DOI:10.1007/BF02931466