Abstract
Soil arbuscular mycorrhizal fungi(AMF) play a crucial role in plant biodiversity and ecosystem variability.However,little was known about the interaction between AMF and alligator weed(Alternanthera philoxeroides) during the weed invasion.Soil samples,collected from Xianning,Xiantao and Wuhan,Hubei Province,were used to investigate the response of AMF biomass under alligator weed invasion using fatty acid methyl ester(FAMEs),and the AMF community structure using PCR-denaturing gradient gel electrophoresis(DGGE) for 18S rDNA.The AMF biomass indicated by FAMEs had no significant increase except for soil sample from Xiantao(P0.05) after alligator weed invasion.Soil AMF community structure of dominant population represented by DGGE shifted significantly under alligator weed invasion.However,both the βWH(diversity index of species composition in the community,ranging from 2.55 to 2.73) and the H′(diversity index of the community,ranging from 1.22 to 1.38) had no significant change.In conclusion,alligator weed invasion resulted in obvious change of the AMF community structure,but had little impact on the AMF biomass and diversity.
Published Version
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