PHYTOTOXIC INFLUENCE OF Tectona grandis L. ON GERMINATION, GROWTH AND BIOCHEMICAL CHANGES OF Solanum lycopersicum L. AND Solanum melongena L.

The study aims to investigate the phytotoxic influence on seed germination and biochemical changes of two Solanceace family crops Solanum lycopersicum L. and Solanum melongena L. with different concentrations (20%, 15%, 10%, 5%, 2%) of aqueous leaf extract of Tectona grandis L. The effect of different concentrations of teak leaf extract was compared with control(water).Decreased germination percentage, shoot, and radicle length of the crops were observed to be concentration dependent.All the different extract concentrations caused an inhibitory and stimulatory effect on the crops' germination and morphogenesis compared to control.Biochemical changes and Phytochemical screening of the T. grandis leaf extract were equally determined.By this treatment, S. lycopersicum showed a more inhibitory effect than S. melongena.