Allelopathic Effect of Seed and Leaf Aqueous Extracts of <i>Datura stramonium</i> on Leaf Chlorophyll Content, Shoot and Root Elongation of <i>Cenchrus ciliaris</i> and <i>Neonotonia wightii</i> — Oak Academic Publishing
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Allelopathic Effect of Seed and Leaf Aqueous Extracts of <i>Datura stramonium</i> on Leaf Chlorophyll Content, Shoot and Root Elongation of <i>Cenchrus ciliaris</i> and <i>Neonotonia wightii</i>
School of Life Sciences and Bioengineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
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School of Life Sciences and Bioengineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
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School of Life Sciences and Bioengineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
1 School of Life Sciences and Bioengineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
2 School of Life Sciences and Bioengineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
3 School of Life Sciences and Bioengineering, The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
Pot experiment was carried out to determine the allelopathic effects of Datura stramonium on leaf chlorophyll content, root and shoot elongation, fresh and dry weight of two wild plant species : Cenchrus ciliaris and Neonotonia wightii . Different concentrations (0% , 25%, 50%, 75% and 100%) from seed and leaf extracts of D. stramonium were used to investigate the allelopathic effects of D. stramonium on growth of tested species. The total chlorophyll content of N. wightii was significantly reduced in all plants tre ated with both aqueous seed and leaf extracts of D. stramonium . In C. ciliaris , the total chlorophyll content was also significantly reduced for those plants treated with aqueous seed extract and leaf extract from D. stramonium . Relative to the control treatments, there was greater reduction in root and shoot length which was observed in higher concentrations of aqueous seed and leaf extracts. Fresh and dry weight of tested species significantly decreased after being treated with both seed and leaf aqueous extracts of D. stramonium . It was found that the allelopathic effect of aqueous seed and leaf extracts from D. stramonium on tested species was concentration-de pendent. The inhibitory effects on all tested species increased as the concentration of both extracts increased from 0% to 100%. This study concluded that aqueous seed and leaf extract of D. stramonium have allelopathic effects on leaf chlorophyll content, root and shoot length, fresh and dry weight of grass ( C. ciliaris ) and legume ( N. wightii ) species.
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