Organic and mineral fertilization, respectively, increase and decrease the development of external mycelium of arbuscular mycorrhizal fungi in a long-term field experiment
Language English Country Germany Media print-electronic
Document type Comparative Study, Journal Article, Research Support, Non-U.S. Gov't
PubMed
16341895
DOI
10.1007/s00572-005-0027-4
PII: 10.1007/s00572-005-0027-4
Knihovny.cz E-resources
- MeSH
- Biomarkers analysis MeSH
- Manure MeSH
- Hyphae growth & development MeSH
- Fatty Acids analysis MeSH
- Medicago sativa microbiology MeSH
- Minerals MeSH
- Mycelium growth & development MeSH
- Mycorrhizae growth & development MeSH
- Colony Count, Microbial MeSH
- Soil analysis MeSH
- Soil Microbiology * MeSH
- Seasons MeSH
- Spores, Fungal growth & development isolation & purification MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Comparative Study MeSH
- Names of Substances
- Biomarkers MeSH
- Manure MeSH
- Fatty Acids MeSH
- Minerals MeSH
- Soil MeSH
Effects of long-term mineral fertilization and manuring on the biomass of arbuscular mycorrhizal fungi (AMF) were studied in a field experiment. Mineral fertilization reduced the growth of AMF, as estimated using both measurements of hyphal length and the signature fatty acid 16:1omega5, whereas manuring alone increased the growth of AMF. The results of AMF root colonization followed the same pattern as AMF hyphal length in soil samples, but not AMF spore densities, which increased with increasing mineral and organic fertilization. AMF spore counts and concentration of 16:1omega5 in soil did not correlate positively, suggesting that a significant portion of spores found in soil samples was dead. AMF hyphal length was not correlated with whole cell fatty acid (WCFA) 18:2omega6,9 levels, a biomarker of saprotrophic fungi, indicating that visual measurements of the AMF mycelium were not distorted by erroneous involvement of hyphae of saprotrophs. Our observations indicate that the measurement of WCFAs in soil is a useful research tool for providing information in the characterization of soil microflora.
Institute of Microbiology CAS Division of Ecology Vídeňská 1083 CZ 142 20 Prague 4 Czech Republic
Research Institute for Crop Production Drnovská 507 CZ 161 06 Prague 6 Czech Republic
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