Published in Scientific Papers. Series A. Agronomy, Vol. LXII, Issue 2
Written by Ioana CRIŞAN, Roxana VIDICAN, Vlad STOIAN, Sorin VÂTCĂ
Iris pseudacorus is an ornamental macrophyte with phytoremediation capacity and medicinal value. In this research, it was used as model plant for study of four commonly occurring micromycetes: arbuscular mycorrhizae (Glomeromycota), fine root endophytes (Mucoromycotina), dark septate endophytes (Ascomycota) and Olpidium sp. (Chytridiomycota). Experiment was established with two substrate types: peat and bark humus, and inoculation treatment with three graduations: 2 and 5 AMF species and non-inoculated respectively. Root samples were collected for microscopic analysis after 3 months in pots and open field. Results show that all AM colonization parameters were higher in field compared to pots, but influence of AM inoculation decreases in field due to established background soil microflora. Frequency of DSE and Olpidium sp. was much higher in pots. Bark humus had a lasting positive effect on plant development. Compared to field, pot growing media could be more prone to microbiome disbalance perhaps due to lack of stability in natural-occurring mechanisms that act to regulate complex interaction dynamics. Understanding conditioning relationship between soil micromycetes across contrasting growing conditions could help addressing practical challenges associated with use of microbial inoculants in agriculture.
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