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Community structures of arbuscular mycorrhizal fungi associated with pioneer grass species Miscanthus sinensis in acid sulfate soils : habitat segregation along pH gradients

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Title: Community structures of arbuscular mycorrhizal fungi associated with pioneer grass species Miscanthus sinensis in acid sulfate soils : habitat segregation along pH gradients
Other Titles: AM fungal community in acid sulfate soil
Authors: An, Gi-Hong Browse this author
Miyakawa, Sachie Browse this author
Kawahara, Ai Browse this author
Osaki, Mitsuru Browse this author
Ezawa, Tatsuhiro Browse this author →KAKEN DB
Keywords: Acid sulfate soil
arbuscular mycorrhizal fungi
community structure
Miscanthus sinensis
pioneer plants
Issue Date: Aug-2008
Publisher: Blackwell
Journal Title: Soil Science & Plant Nutrition
Volume: 54
Issue: 4
Start Page: 517
End Page: 528
Publisher DOI: 10.1111/j.1747-0765.2008.00267.x
Abstract: Acid sulfate soil shows extremely low-pH, and revegetation of the soil is difficult due to high concentration of toxic elements such as aluminum and poor nutrient availability. Community compositions of arbuscular mycorrhizal (AM) fungi that associate with Miscanthus sinensis, pioneer grass species in acid sulfate soil, were investigated to clarify environmental factors that regulate the community structure. The rhizosphere soils of M. sinensis grown in acid sulfate soil were collected from three sites that distributed in subarctic, temperate and subtropical zones in addition to those of the plants grown in a sandy soil site in a subarctic zone. M. sinensis seedlings were grown on these soils in a greenhouse for 2 months, and large subunit ribosomal RNA gene of the fungi was amplified from DNA extracted from the roots. Based on the nucleotide sequences of the gene, 20 phylotypes across 6 genera were detected from the four sites in total. The similarity indices of AM fungal communities among the sites did not correlate with geographical distance. Ordination analysis (principal component analysis) on the communities suggested that the first principal component reflected edaphic factors, particularly soil pH. Plotting of soil pH data at which respective phylotypes occurred and subsequent statistical analysis revealed that the ranges of preferential pH were significantly different among the phylotypes. The distribution of AM fungal phylotypes along pH gradients was further recognized by plotting the first principal component scores of the phylotypes against their preferential pH. The phylotypes that showed higher scores along the second principal 21 component were detected from three or more sites and occurred in a wide range of pH. These observations suggested that the preference and range of substrate pH to which the fungi could adapt were different among the phylotypes and thus soil pH might be a likely driving force for structuring AM fungal communities in acid sulfate soils.
Description: The official journal of the Japanese Society of Soil Science and Plant Nutrition
Rights: The definitive version is available at www.blackwellsynergy.
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 江澤 辰広

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