Different growth response of five co-existing stoloniferous plant species to inoculation with native arbuscular mycorrhizal fungi
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Five species of stoloniferous plants originating from the same field site (Galeobdolon montanum, Glechoma hederacea, Potentilla anserina, Ranunculus repens and Trifolium repens) were studied with respect to their interaction with arbuscular mycorrhizal (AM) fungi. More specifically, the question was addressed whether mycorrhizal growth response of host plant species could be related to their vegetative mobility. The roots of all the species examined were colonised with AM fungi in the field, with the percentage of colonisation varying among species from approximately 40% to 90%. In a subsequent pot experiment, plants of all the species were either left non-inoculated or were inoculated with a mixture of three native AM fungi isolated from the site of plant origin (Glomus mosseae, G. intraradices and G. microaggregatum). AM fungi increased phosphorus uptake in all the plant species; however, plant growth response to inoculation varied widely from negative to positive. In addition to the biomass response, AM inoculation led to a change in clonal growth traits such as stolon number and length or ramet number in some species. Possible causes of the observed differences in mycorrhizal growth response of various stoloniferous plants are discussed.
KeywordsArbuscular mycorrhizal symbiosis Clonal growth traits Mycorrhizal colonisation Phosphorus uptake Vegetative mobility
Financial supports by the Czech Science Foundation, project No. 526/05/P063, and the Grant Agency of the Academy of Sciences of the Czech Republic within the institutional project AV0Z60050516 are gratefully acknowledged. My sincere thanks go also to Marie Albrechtová for performing chemical analyses, and to J. Suda, Z. Sýkorová, J. Rydlová, M. Vosátka, and two anonymous reviewers for their comments on an earlier draft of the manuscript.
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