PJB-2019-470
EFFECT OF RADISH (Raphanus sativus) AQUEOUS EXTRACT ON GERMINATION AND SEEDLING GROWTH OF WHEAT, WILD OAT AND WILD BARLEY
SAMAN A. RASUL
Abstract
Abstract This study was carried out in Agricultural College, Salahaddin University in order to investigate the allelopathic effects of radish (Raphanus sativus L.) roots aqueous extracts on germination and growth of bread (Triticum aesitivum L.), and durum wheat (Triticum durum L.) crops with two endemic weed plants wild oat and wild barley (Avena fatua and Hordeum spontaneum). The experimental units were arranged using completely randomized design with three replications. Results indicated the significant effects of different concentrations 10%, 20%, 30% and 40% of aqueous extracts compared to control 0% treatments. The highest concentration (40%) of radish roots aqueous extract completely inhibited seed germination and seedling growth while the lowest concentration (10%) had least negative impact. The effects were concentration dependent on all studied parameters. Some polyphenols such as vanillic acid, syringic acid and gallic acid profiled in radish root by using High Performance Liquid Chromatography (HPLC).It is concluded that the radish aqueous extracts imposed herbicidal effect on the studied plants which 40% of its aqueous extracts significantly inhibited seed germination (100%) of the examined plant species.
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