Soil is a limited resource often polluted by heavy metals. The study examined the effect of remediation on fungal parameters in arbuscular mycorrhizal (AM) fungi and septate endophytes (SE), in association with different soil types. We designed a pot experiment in which we used acidic soil from Arnoldstein (Austria) and carbonate soil from the Mežica valley (Slovenia). Half of the original (heavy metal polluted) soils of both sites were remediated with EDTA (ethylenediaminetetraacetic acid), which effectively removes heavy metals from the polluted soil. With the purpose of revitalizing the soil, we planted the plants of a perennial ryegrass (Lolium perenne L.), and we also added an inoculum (rhizosphere from a nearby grassland). The paper presents data on the mycorrhizal potential of AM fungi and SE in original and remediated soil and the mycorrhic potential of AM fungi and SE in original and remediated soil with added inoculum. We compared the data of the presence of AM fungi parameters in two time periods (2016 and 2017). We observed that mycorrhiza in some plants was established after about 4 months after sowing the plants of Lolium perenne L. (sowing, July 11, 2016). In 2017 (fourth sampling, 17 November 2017), colonization was detected in all treatments. We found that the remediated Austrian soil had significantly higher colonization of the roots of Lolium perenne L. with AM fungi as non remediated soil, while in the Slovene soil was observed exactly the opposite. The use of inoculum (rhizosphere soil) did not lead to a higher presence of AM fungi in the roots of plants.
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