Back to Search
Start Over
Diversity and ubiquity of thermophilic methanogenic archaea in temperate anoxic soils.
- Source :
-
Environmental microbiology [Environ Microbiol] 2006 Mar; Vol. 8 (3), pp. 394-404. - Publication Year :
- 2006
-
Abstract
- Temperate rice field soil from Vercelli (Italy) contains moderately thermophilic methanogens of the yet uncultivated rice cluster I (RC-I), which become prevalent upon incubation at temperatures of 45-50 degrees C. We studied whether such thermophilic methanogens were ubiquitously present in anoxic soils. Incubation of different rice field soils (from Italy, China and the Philippines) and flooded riparian soils (from the Netherlands) at 45 degrees C resulted in vigorous CH(4) production after a lag phase of about 10 days. The archaeal community structure in the soils was analysed by terminal restriction fragment length polymorphism (T-RFLP) targeting the SSU rRNA genes retrieved from the soil, and by cloning and sequencing. Clones of RC-I methanogens mostly exhibited T-RF of 393 bp, but also terminal restriction fragment (T-RF) of 158 and 258 bp length, indicating a larger diversity than previously assumed. No RC-I methanogens were initially found in flooded riparian soils. However, these archaea became abundant upon incubation of the soil at 45 degrees C. Thermophilic RC-I methanogens were also found in the rice field soils from Pavia, Pila and Gapan. However, the archaeal communities in these soils also contained other methanogenic archaea at high temperature. Rice field soil from Buggalon, on the other hand, only contained thermophilic Methanomicrobiales rather than RC-I methanogens, and rice field soil from Jurong mostly Methanomicrobiales and only a few RC-I methanogens. The archaeal community of rice field soil from Zhenjiang almost exclusively consisted of Methanosarcinaceae when incubated at high temperature. Our results show that moderately thermophilic methanogens are common in temperate soils. However, RC-I methanogens are not always dominating or ubiquitous.
- Subjects :
- Anaerobiosis
Archaea genetics
China
DNA Fingerprinting
DNA, Archaeal chemistry
DNA, Archaeal genetics
DNA, Ribosomal chemistry
DNA, Ribosomal genetics
Ecosystem
Methanomicrobiales classification
Methanomicrobiales genetics
Methanomicrobiales isolation & purification
Methanosarcinaceae classification
Methanosarcinaceae genetics
Methanosarcinaceae isolation & purification
Molecular Sequence Data
Phylogeny
Polymorphism, Restriction Fragment Length
Sequence Analysis, DNA
Temperature
Archaea classification
Archaea isolation & purification
Biodiversity
Methane biosynthesis
Soil Microbiology
Subjects
Details
- Language :
- English
- ISSN :
- 1462-2912
- Volume :
- 8
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Environmental microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 16478446
- Full Text :
- https://doi.org/10.1111/j.1462-2920.2005.00904.x