Allelopathic effects of sunflower (Helianthus annuus L.) on germination and seedling growth of wheat (Triticum aestivum L.)
2000
Ghafar, A. | Saleem, B. (University of Agriculture, Faisalabad (Pakistan). Dept. of Chemistry) | Qureshi, M.J.
The allelopathic influence of water extracts of sunflower on wheat's germination and seedlings growth have been evaluated. It was observed that sunflower water extracts at a concentration of 25, 50, 75 and 100% showed inhibitory effect on wheat germination and the effect differed significantly in all the treatments. The growth of wheat seedlings was found significant in terms of root and shoot lengths and non-significant for fresh and dry weights in comparison to the control. Chemical composition of wheat seedlings influenced by four sunflower water extracts indicated a significant change in the starch contents in all the treatments in comparison to the control. A similar trend was also found in the protein and phosphorus contents. Potassium contents of wheat seedlings were decrease gradually except at 75% concentration. Whereas ash contents increased in 25% and 75% concentration and decreased in 50% and 100% concentrations suggesting the stimulatory and inhibitory potencies of sunflower water extracts at different concentrations. It is concluded that the degree of inhibition was dependent upon the concentration of the extract. The chemical parameters like starch, protein, phosphorus, potassium and ash were also reduced confirming the influence of water extracts of sunflower at various concentrations.
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