Abstract
Allelopathic effects of corn (Zea mays) extracts was studied, against seed germination and seedling growth of Phalaris minor, Helianthus annuus, Triticumaestivum, Sorghum halepense, Z. mays. Bioassay results showed that aqueous extracts of corn root and shoot, markedly affected seed germination, and other parameters compared with related controls. Preliminary phytochemical screening revealed the presence of various phytochemicals such as tannins, phlobatannins, flavonoids, terpenoids and alkaloids in both roots and shoot aqueous extracts. However, saponins were only present in the shoot aqueous extract, while in shoot ethanol extracts, only terpenoids and alkaloids were detected. Additionally, total polyphenolic (TPC) content in aqueous extracts of corn root and shoot, plus ethanol extracts of corn shoot were determined using an Ultraviolet–visible spectroscopy. Results revealed TPC content of the corn shoot aqueous extract showed the highest yield, compared to other extracts. These findings suggest that phytochemicals present in Z. mays extracts may contribute to allelopathy effect.
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