Allelopathic herbicidal effects of crude ethanolic extracts of Veronica persica (Lour.) Merr. on weeds

文献类型： 外文期刊

第一作者： Bai, L. Y.

作者： Bai, L. Y.

作者机构：

关键词： Allelopathic effects; Beckmannia syzigachne (Steud.) Fern; defense enzyme activity; Echinochloa crusgalli (L.) Beauv; ethanol extract; GC-MS; germination; herbicidal; Leptochloa chinensis (L.) Nees; Lindernia procumbens (Krock.) Philcox; Veronica persica (Lour.) Merr

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

ISSN： 0971-4693

年卷期： 2019 年 46 卷 1 期

页码：

收录情况： SCI

摘要： We investigated the herbicidal activity of ethanolic extracts of Veronica persica (Lour.) Men . against four weeds (Echinochloa crusgalli (L.) Beauv., Beckmannia syzigachne (Steud.) Fern., Leptochloa chinensis (L.) Nees and Lindernia procumbens (Krock.). The chemical constituents of V persica were identified using gas chromatography-mass spectrometry (GCMS). The possible inhibitory mechanisms of the ethanolic V persica (Lour.) Merr. extracts to E. crusgalli (L.) Beauv. were evaluated by comparing the activities of catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) enzymes. Lower extract concentrations (50 and 100 mu g/mL) were less inhibitory than higher concentrations (150 and 300 mu g/mL). The allelopathic herbicidal effects of V. persica (Lour.) Merr. on the 4-test weeds followed the order: L. chinensis (L.) Nees, L. procumbens (Krock.) Philcox, B. syzigachne (Steud.) Fern., E. crusgalli (L.) Beauv.. Twenty-one compounds were identified in the ethanolic extracts, of which 9,12,15-octadecatrienoic acid (EC50 =0.65 mu g/mL) was the major component, followed by 4-compounds [9,12-octadecadienoic acid, hexadecanoic acid (EC50 =7.13 mu g/mL) and decanoic acid (EC50 =0.48 mu g/mL)]. All these compounds were herbicidal. The CAT, POD and SOD activity of E. crusgalli (L.) Beauv. leaves increased at lower concentrations of V. persica (Lour.) Men . extracts, but decreased at higher concentrations. It was concluded that V. persica (Lour.) Men . had strong allelopathic herbicidal activity, thus a standard herbicide against weeds can be developed from its major components.

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