EFFECT OF SEASON AND SOIL TREATMENTS ON CARBOHYDRATE CONCENTRATIONS IN NORWAY SPRUCE (PICEA-ABIES) MYCORRHIZAE

We studied effects of season and soil treatments (watering, acidificat ion, liming and combinations of these treatments) on soluble carbohydr ates of mycorrhizal roots of Norway spruce (Picea abies (L.) Karst.). Arabinose, arabitol, fructose, glucose, inositol, lactose, mannitol, p inite, quinate, raffinose, shikimate, stachyose and trehalose were ide ntified by HPLC. Concentrations of inositol, lactose and pinite were c onstant throughout the year, whereas concentrations of raffinose, stac hyose and trehalose were higher in winter than in summer, and concentr ations of glucose, fructose and mannitol increased from February to Se ptember. Soil acidification and liming had no effect on the annual mea n concentrations of fructose, glucose, lactose, pinite, raffinose and stachyose. Liming increased quinate concentrations and decreased arabi tol concentrations. Annual mean concentrations of arabinose and mannit ol decreased in response to soil acidification. Annual mean concentrat ions of inositol increased in response to irrigation. None of the soil treatments affected the mean annual concentration of trehalose.