Abstract
Aims Coumarins are herbicides occur naturally in all parts of plants and are used widely used as medicine The present work reports the plant growth regulating activity of coumarin derivatives which may or may not found naturally Method nbsp A series of coumarin was prepared by reacting phenols with malic acid and diethyl acetoacetate Compounds were tested for seed germination inhibitory activity using wheat and sorghum seeds and effects on seedling growth for days Results nbsp Some of the compounds had potential seed germination inhibition activity and exhibited reductions in shoot growth and root growth of developing young seedlings compared with that of untreated control All compounds exhibited inhibitions in seed germination of shoot and root growth at lower and higher concentrations Conclusion nbsp Coumarins used to delay the germination of seeds simply by lowering the metabolic process during the imbibitions but early growth of seed show somewhat acceleration
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