Distribution characteristic of arbuscular mycorrhizal fungi in the rhizosphere of endangered Lilium tsingtauense plants
To estimate the spatial distribution of arbuscular mycorrhiza (AM) fungi in the rhizosphere of L. tsingtauense with the process of reducing population density, we collected soil samples from the rhizosphere of L. tsingtauense and the dominant species (Polygonatum odoratum) of plants community in Laoshan in October 2014 to isolated and identify AM fungal spores, to determine their population density, and soil factors. The results showed that there were 14 species in four genera, and 11 species in three genera of AM fungi identified in the rhizosphere of L. tsingtauense, and P. odoratum, respectively. The root colonization rate increased with the increasing of the population density of L. tsingtauense in 10-20 cm soil layer. The root colonization percentage of large population density sample of P. odoratum was significantly higher than small sample population density. The population density had no significant effect on arbuscular colonization on L. tsingtauense root, but the vesicle colonization decreased with the increasing of population density in 10-20 and 20-30 cm soil layer and P. odoratum in 0-10 and 10-20 cm soil layer. The hypha colonization percentage of L. tsingtauense increased along with the increasing of population density in 30-40 cm soil layer and P. odoratum in 10-20 cm soil layer. The population density had a significant effect on spore density in the rhizosphere of the tested plants. The contents of total extractable glomalin in the rhizosphere of L. tsingtauense decreased as the L. tsingtauense population density increased. Acid phosphatase and urease increased with the increasing of L. tsingtauense population density in 10-20 and 20-30 cm soil layer.
AM fungiLilium tsingtauenseendangered plantsoil factorspatial distribution
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