ALLELOPATHIC POTENTIAL OF SECONDATIA FLORIBUNDA A. DC. (APOCYNACEAE) ON SEEDS OF LYCOPERSICUM ESCULENTUM MILLER. (SOLANACEAE)

Resumo

The aqueous extract of fresh leaves of Secondatia floribunda A. DC. (catuaba-de-cipo) was tested to evaluate the allelopathic potential in seeds of Lycopersicum esculentum Miller (tomato). Four concentrations (25, 50, 75, 100%) were tested with five repetitions each, where they were  compared to the control. The extract not inhibited the germination of the tomato seeds. On the other hand, there was a significant allelopathic effect on the germination speed index (GSI) and on the lengths of the aerial and root parts, which were reduced its length with increasing extract concentration, causing abnormal seedlings.