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Allelopathic potential and volatile compounds of Manihot esculenta Crantz against weeds

文献类型： 外文期刊

作者： Li, J. 1 ; He, S. Y. 1 ; Qin, X. D. 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Guangzhou Expt Stn, Guangzhou 510140, Guangdong, Peoples R China

关键词： Allelopathy;aqueous;GCMS;leachates;Lolium perenne;Manihot esculenta;Medicago sativa;Sorghum sudanense;root;shoot;soil;volatile compounds

期刊名称：ALLELOPATHY JOURNAL （ 影响因子：0.962； 五年影响因子：0.99 ）

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收录情况： SCI

摘要： We determined the allelopathic effects of aqueous leachates from fresh roots, stems, leaves and dried leaf litter of Manihot esculenta on three weed species (Medicago sativa L., Lolium perenne L. and Sorghum sudanense (Piper) Stapf.). The aqueous leachates of roots, stems and leaf at 50 and 100 mg/ml concentrations and leaf litter leachate at 3 and 5 mg/ml inhibited the seed germination and seedling growth of all tested weed species. Soil in which cassava cv. 'South China 5 (SC5)' was grown, also significantly inhibited the root and shoot length of Medicago sativa and Lolium perenne and the root length of Sorghum sudanense. The chemical constituents of volatile compounds from fresh Manihot esculenta roots, stems and leaves were analyzed by GCMS. The major constituents of volatile compounds in cassava were: (i). Roots : hexadecane, 2,6,11,15-tetramethyl-, dodecane, 2,7,10-trimethyl- and undecane, (ii). Stems: 9,17-octadecadienal, (Z)- and cis, cis, cis-7,10,13-hexadecatrienal and (iii). Leaves : Nonanal, Caryophyllene oxide, Tetradecanal. Both laboratory and pot experiments showed that Manihot esculenta was allelopathic to the tested weed species.

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