Effectiveness of Peas aqueous extracts on germination and growth of two Wheat cultivars

This study aims to assess the allelopathic effects of pea (Pisum sativum L.) aqueous extracts on the growth and germination of two wheat cultivars, Atlas and Aseel. The aqueous extracts, tested at concentrations of 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, and 10%, were applied in both laboratory and greenhouse conditions Randomized Complete Design (RCBD) Results show the effect of aqueous extracts of pea leaves at (1,2,3,4,5,6,7,8,9,10%) on wheat cultivars (Atlas and Aseel ) in the laboratory, as a decrease was observed in germination percentage of cultivar Atlas at most of the treatments, There are also found a decrease in both plumule length and its dry weight in all treatments except for the increase at 1% concentration. Results showed a decrease in the length of the root and its dry weight in all treatments except for the increase at (1,2 and 3% concentration), and the highest rates of increase for plumule length, plumule dry weight, root length and root dry weight were (6.21, 44.06, 52.58, and 55%) respectively at 1% concentration. Results of the greenhouse showed pea leaves aqueous extracts at 3% concentration caused an increase in shoot and root length of Atlas cultivar seedlings, while it caused an increase in shoot and root dry weight in Aseel cultivar. There is a fluctuation in the chlorophyll content of the tested cultivars due to various treatments. Treatment of 1% aqueous extracts increased the leaf area of Atlas, while other treatments reduced leaf area for both cultivars.