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| Titel |
Effects of endophytic and mycorrhizal fungi associated with Salix appendiculata on soil aggregate stability |
| VerfasserIn |
Kathrin Beglinger, Thomas Sieber, Frank Graf |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250047525
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| Zusammenfassung |
| In view of sustainable soil stability, eco-engineering measures in extremely challenging
landslide areas such as Hexenrübi (Dallenwil, Switzerland) ask for well suited combinations
of plants and their microbial partners. Mycorrhizal fungi and endophytes can influence soil
stability directly by their mycelial networks in the soil as well as indirectly, altering roots and
physical conditions of the host plants.
In a laboratory study Salix appendiculata which colonized the less extreme slopes of
Hexenrübi naturally and more successfully than the introduced species of the eco-engineering
measures, was inoculated with different combinations of mycorrhizal and endophytic
fungi. Beside the general impact of the different fungal treatments on soil aggregate
stability, it was of particular interest whether direct or indirect effects of the fungi
prevail.
Sterilized soil and seeds of Salix appendiculata from the Hexenrübi were filled in plastic
cylinders and inoculated with Hebeloma crustuliniforme (ectomycorrhiza), Glomus
mossae and G. intraradices (arbuscular mycorrhiza), and a dark septated endophyte
(DSE) of the Phialocephala fortinii-complex (PAC), individually and in different
combinations. After a four months growth period soil aggregate stability was measured by a
wet sieving procedure for each of the cylindrical soil samples and quantified as
the fraction of water stable aggregates. Different root and plant parameters were
analysed and, additionally, root and soil samples were taken for estimating the amount
of fungal hyphae in the soil (direct effect). For that purpose, the Ergosterol – a
fungi specific membrane component- was determined by High-Performance Liquid
Chromatography (HPLC). The mycorrhization degree of the roots (indirect effect) by
ecto- and arbuscular fungi was estimated by a gridline intersect method whereas
the colonisation by PAC endophytes was determined by PCR using PAC specific
IT-sequences.
All treatments with Hebeloma crustuliniforme (ectomycorrhiza) had significantly
(p-values |
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