Herbicidal activity of allelochemicals from the root bark of Periploca sepium Bunge

文献类型: 外文期刊

第一作者: Su, S.

作者: Su, S.;Wang, Z. F.;Zeng, Y. F.;Shi, X. H.;Yang, H.;Cao, H. Q.;Wang, X. X.;Li, Y.;Su, S.;Wang, Z. F.;Su, S.;Su, S.;Wang, Z. F.;Li, Y.;Zeng, Y. F.;Shi, X. H.;Yang, H.;Cao, H. Q.

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关键词: Allelochemical; Alternanthera philoxeroides; Amaranthus retroflexus; bioassay; Conyza canadensis; herbicidal activity; 2-hydroxy-4-methoxybenzaldehyde; Mikania micrantha; Periploca sepium; Humulus Scandens; Portulaca oleracea; seed germination; seedlings growth; Setaria viridis; toxicity; weed

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 47 卷 2 期

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收录情况: SCI

摘要: This study aimed to examine the role of the allelochemicals in the root bark of Periploca sepium Bunge in weed management. The allelochemical was isolated using a bioactivity-guided method and characterised as 2-hydroxy-4-methoxy-benzaldehyde by H-1 and C-13 1D NMR spectroscopic data. The herbicidal activity of 2-hydroxy-4-methoxy-benzaldehyde against 6 common weeds (Amaranthus retroflexus, Alternanthera philoxeroides, Humulus Scandens, Conyza canadensis, Mikania micrantha, Portulaca oleracea, Setaria viridis) was evaluated in growth bioassays, contact bioassays and rooting bioassays. The Application of 2-hydroxy-4-methoxy-benzaldehyde at 1mg/ml completely inhibited the seeds germination and also significantly inhibited the growth of taproot and caulis in test weeds. The results of contact bioassays showed dose-dependent toxicity of 2-hydroxy-4-methoxy-benzaldehyde to the leaves of all test weeds. The test weeds leaves wilted, after the treatment and the injured leaves did not recover. With the decreasing concentration of 2-hydroxy-4-methoxy-benzaldehyde, the toxicity symptoms of the tested on leaves were gradually reduced. Besides, the rooting bioassays results showed that 2-hydroxy-4-methoxy-benzaldehyde at 0.0625 mg/ml concentration significantly inhibited the rooting in Alternanthera philoxeroides Griseb. To conclude, 2-hydroxy-4-methoxybenzaldehyde might be a potential broad-spectrum herbicide.

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