ANTIOXIDANT CHARACTERISTICS OF SELECTED PLANT SPECIES GROWING UNDER POST-FIRE ENVIRONMENTAL CONDITIONS

摘要

The flavonoid content (TFC), total phenols (TPC), DPPH radical scavenging activity (RSA) and, Fe(III) to Fe(II) reducing power (RP) of methanol extracts from 13 plant species that have been grown under non-disturbed environmental conditions (NDEC) and post-fire environmental conditions (PFEC) were investigated. The impact of wildfire on examined properties depends on plant species. Although there are significant differences for most pairs of individual samples (PFEC and NEC) it could not be said for investigated characteristics when all thirteen NEC samples considered as one group and PFEC samples as another group (p > 0.05). Some extracts expressed EC_(50) value close to the value of EC_(50) for BHT, proving themselves as excellent antioxidants. The content of flavonoids shows moderate correlation with Mo(VI) to Mo(V) and Fe(III) to Fe(II) reducing power and DPPH scavenging capacity. To the best authors knowledge, there were no reports on the impact of wild fire on the above-mentioned plant characteristics.