Abstract
The aim of this study was to examine and to compare the effect of arbuscular mycorrhizal fungi (AMF) inoculation and artificial fertilization (NPK) on the growth and content of active substances of marjoram (Origanum majorana L.). The soil of the experimental field without the addition of commercial AMF and of NPK served as a control. In the 1st treatment NKP, in the 2nd treatment commercially available AMF inoculum (INOQ) and in the 3rd treatment NKP and AMF mixture were added to the soil of the experimental field. The efficiency of the mycorrhization was verified by monitoring the fungal root colonization of the plants. Essential oil composition and the main polyphenolic compounds were identified and quantified in the flowering shoots of marjoram harvested at the end of the vegetation period using GC-MS and HPLC-ESI-qTOFMS respectively.
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