Published in Scientific Papers. Series B, Horticulture, Vol. LXVIII, Issue 1
Written by Alina PERIȘOARĂ, Lucia PÎRVU, Diana Manuela ENE, Marian PAVEL, Laura OLARIU, Stelica CRISTEA
This research paper aimed to evaluate the influence of two types of extracts from the flowers of Tagetes erecta on radish seeds. The extracts were obtained in two organic solvents, ethanol 70% and propylene glycol - PG-50%. Studies were carried out on the phenolic profile, dry matter and antioxidant activity by the DPPH method. The results highlighted that the extract in ethanol had a high concentration only in the total content of flavonoids (6,574 RE mg/mL) compared to the extract in PG (5,111 RE mg/mL) and slightly higher content in polyphenols was found in the case of the PG extract variant. The extract in ethanol 70% registered a higher redox potential (EC50-0.65µl/ml extract). The monitoring of the effect of the extracts was carried out by applying the radish seed germination bioassay. Thereby, the extracts in ethanol showed moderately phytotoxic activity at 0.50% concentration (Gi<80%) and strongly phytotoxic at 1.50% (Gi<50%), and in the case of the extract in PG, they showed moderately phytotoxic activity at 0.50% concentration and a stimulatory effect at 1.50% concentration (Gi>100%).
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