Tytti Sarjala , Seppo Kaunisto

Ectomycorrhizae in Scots pine seedlings at different trophic levels of a drained mire. A preliminary study

Sarjala T., Kaunisto S. Ectomycorrhizae in Scots pine seedlings at different trophic levels of a drained mire. A preliminary study.

Tiivistelmä

The mycorrhizal infection of the roots of four-year-old Scots pine seedlings was stud ied by analysing root ergosterol, endogenous polyamines, nitrogen, phosphorus and potassium concentrations after two years in the field.The seedlings had been planted in a 25-year-old pine plantation on an originally treeless mire representing a wide peat nitrogen gradient.Common mycorrhizal types with Scots pine, such as Cenococcum Piloderma and Boletaceae types, and a number of unidentified types were found in the roots.The roots contained quite normal or a little lower levels of ergosterol than re ported elsewhere on tree roots in mineral soil forests.After two growing seasons in the field a positive correlation (r =0.584**)was found between the root ergosterol and peat nitrogen concentrations.The root ergosterol and spermidine concentrations correlated positively.This may be due to a more abundant physical presence of the fungal tissue which contains more spermidine than the other polyamines, or it may be due to a posi tive effect of the mycorrhizal fungi on the metabolic activity of the roots.

Avainsanat
Ectomycorrhiza; ergosterol; peat nitrogen; Pinus sylvestris polyamines

Vastaanotettu 31.10.2017 Julkaistu 1.1.2000

Katselukerrat 1522

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