ISSN:
1432-1890
Keywords:
Key words Protozoa
;
Ectomycorrhizal fungi
;
Douglas fir
;
Microbial ecology
;
Biodiversity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Protozoan communities around roots with different types of ectomycorrhizae were distinct. These protozoan communities differed both qualitatively and quantitatively with the host (Pinus ponderosa, Pseudotsuga menziesii, Picea sitchensis, Tsuga heterophylla and Abies grandis) and the ectomycorrhizal fungal species. Based on the species identified and the numbers of individuals of each species, six communities of protozoa were found associated with specific ectomycorrhizae. Previous researchers have shown that mycorrhizal colonization of roots alters the amounts and types of exudates produced by roots, which in turn alters the bacterial community present. Most likely, mycorrhizal colonization of roots influences the protozoan community around roots by controlling the bacterial community. However, the protozoan community may in turn influence the successional dynamics of ectomycorrhizal fungi on different host root systems by a variety of mechanisms. These mechanisms could include: (1) preying upon individuals and perhaps removing particular species of bacteria from the mycorrhizosphere; and (2) controlling nitrogen mineralization in the rhizosphere. Further work needs to be performed to determine the interaction between these quadrate (plant-bacteria-fungi-protozoa) associations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s005720050041
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