Root colonization with arbuscular mycorrhizal fungi and glomalin-related soil protein (GRSP) concentration in hypoxic soils in natural CO2 springs

  • Irena Maček University of Ljubljana, Biotechnical Faculty, Department of Agronomy, Jamnikarjeva 101, SI-1001 Ljubljana, Slovenia
  • Damijana Kastelec University of Ljubljana, Biotechnical Faculty, Department of Agronomy, Jamnikarjeva 101, SI-1001 Ljubljana, Slovenia
  • Dominik Vodnik University of Ljubljana, Biotechnical Faculty, Department of Agronomy, Jamnikarjeva 101, SI-1001 Ljubljana, Slovenia
Keywords: arbuscular mycorrhizal fungi, Glomeromycota, root colonization, GRSP, glomalin, natural CO2 springs, mofette, hypoxia, abiotic factors, extreme habitat, spatial distribution, soil fungi

Abstract

Changed ratios of soil gases that lead to hypoxia are most often present in waterlogged soils, but can also appear in soils not saturated with water. In natural CO2 springs (mofettes), gases in soil air differ from those in typical soils. In this study, plant roots from the mofette area Stavešinci (Slovenia) were sampled in a spatial scale and investigated for AM fungal colonization. AM fungi were found in roots from areas with high geological CO2 concentration, however mycorrhizal intensity was relatively low and no correlation between AM fungal colonization and soil pattern of CO2/O2 concentrations (up to 37% CO2) was found. The relatively high abundance of arbuscules in root cortex indicated existence of functional symbiosis at much higher CO2 concentrations than normally found in soils. In addition, concentration of two different glomalin-related soil protein fractions – EE-GRSP and TG-GRSP – was measured. No significant correlation between any of the fractions and soil gases was found, however the concentration of both fractions was significantly higher in the upper 0–5 cm, compared to the 5–10 cm layer of the soil.

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Section
Articles
Published
Mar 12, 2012
How to Cite
Maček, I., Kastelec, D., & Vodnik, D. (2012). Root colonization with arbuscular mycorrhizal fungi and glomalin-related soil protein (GRSP) concentration in hypoxic soils in natural CO2 springs. Agricultural and Food Science, 21(1), 62-71. https://doi.org/10.23986/afsci.5006