Allelopathic effect of black mustard tissues and root exudates on some crops and weeds

Planta Daninha

E Al-sherif²  A.k. Hegazy¹  N.h. Gomaa¹  M.o. Hassan¹ 

[1] ,King AbdulAziz University Faculty of Sciences and Arts- Khulais Biology Department,Saudi Arabia

关键词: allelopathy;    Brassica nigra;    plant extracts;    isothiocyanates (ITCs);    phenolic acids;    alelopatia;    Brassica nigra;    extratos vegetais;    isotiocianatos (ITCs);    ácidos fenólicos;   

DOI  :  10.1590/S0100-83582013000100002

来源: SciELO

【 摘 要 】

Laboratory and greenhouse experiments were conducted to evaluate the phytotoxic effect of black mustard extracts and root exudates on two crops: Trifolium alexandrinum and Triticum aestivum, and two weeds: Phalaris paradoxa and Sisymbrium irio. The seeds were treated with aqueous and ethanolic extracts and chloroform for eight days, or subjected to root exudates of just harvested mustard in a greenhouse for five weeks. High-performance liquid chromatography (HPLC) was used to quantify phytotoxins from plant tissues. Seed germination of P. paradoxa was reduced with the lowest concentration of the different extracts. However, the aqueous extract at 4% completely curtailed the germination of all the target species. In general, plant extracts had a concentration-dependent reduction of seedling growth of the target species. However, the ethanolic extract, at the lowest concentration, has stimulated the shoot length of both T. alexandrinum and T. aestivum, and the root length of the former. Mustard root exudates inhibited emergence and growth of the target species throughout the experiment. Ferulic and syringic acids were the dominant allelochemicals found when HPLC was used.

【 授权许可】

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