Effect of simulated acid rain on mycorrhizal infection of Pinus strobus L.

Abstract

Mycorrhizai infection but not growth of white pine seedlings was reduced by application of simulated rain at pH 3.5 at 3 times ambient rates to plants grown in steamed Mardin soil inoculated with Pisolithus tinctorius. In unsteamed Mardin soil, the simulated acid rain at 3 times ambient rates had no effect on rnycorrhizal infection or growth of pine seedlings if the rain was applied to the plants and soil or to only the soil before planting, except that nitrate-containing acid rain increased growth, infection and N content. In limed Mardin soil, the simulated acid rain reduced mycorrhizal infection if applied to the plants and soil as the seedlings were growing but not if applied to the soil before planting. Application of pH 3.5 rain at ambient rates had no detectable influence on mycorrhizal infection in 6 of 9 soils tested, but it stimulated infee, tion in 3 soils if the simulated rain contained only sulfate and in 1 soil if it had both sulfate and nitrate.Water, Air, and Soil Pollution 25 (1985) 107-114. 0049-6979/85.15.

Effects of liming on ectomycorrhizal fungi infecting Pinus sylvestris L.

“…Since the shoot/root ratio and the nitrogen concentration of the needles also increased with more liming, the increased plant biomass could also have been an effect of a better nutrient availability after liming. Stroo & Alexander (1984) found both plant growth and infection of P. strobus seedlings increased when they limed soil prior to exposure to artificial acid rain. The internal nitrogen levels of the plants also increased, but never exceeded 2 %.…”

Fine roots and ectomycorrhizas as indicators of environmental change

“…Stroo & Alexander, 1985;Meier et al, 1989;Kieliszewska-Rokicka et al, 1998;Rudawska et al, 2000) or increased . The different findings may result from variable tolerance of ECM symbionts to acidity and Al.…”

Aluminium polyphosphate in the ectomycorrhizal fungus Suillus variegatus (Fr.) O. Kunze as revealed by energy dispersive spectrometry

“…Recently Donner & Heyser (1989) found Al to be bound in the fungal walls and in the lumina of the hyphae of the fungal sheath of beech mycorrhizas. The fungi react differently to Al because they show differences in their ability to form metallo-organic complexes (Medve et al, 1977;Marx & Artman, 1979;Haug, 1984;Stroo & Alexander, 1985).…”