Influence of extracts from peppermint (Mentha x piperita (L.) Hudson) on growth and activity of the PSII sunflower garden (Helianthus annuus L.)

Abstract

Allelopathic compounds by living organisms or during the breakdown of dead organic matter are emitted. They were discovered in all plant organs, both vegetative and generative. The aim of the study was to examine influence of the aqueous extracts from leaves of peppermint (Mentha x piperita (L.) Hudson) in concentration: 1, 3, 5, 10, 15% on growth and activity of the PSII sunflower garden (Helianthus annuus L.) plants. The allelopathic compounds contained in the aqueous extracts of peppermint leaves, depending on the concentration and development stage of H. annuus, had inhibitory or stimulating effect on the growth and functioning of the photosystem PSII