Phytotoxic effects of a dominant weed Ligularia virgaurea on seed germination of Bromus inermis in an alpine meadow community

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	Phytotoxic effects of a dominant weed Ligularia virgaurea on seed germination of Bromus inermis in an alpine meadow community
	Wu Gao-Lin ; Ren Guo-Hua ; Shi Zhi-Hua
刊名	PLANT ECOLOGY AND EVOLUTION
	2011
卷号	114 期号:3 页码:275-280
关键词	alpine meadow Bromus inermis germination invasive weed Ligularia virgaurea phytotoxic effects
通讯作者	Shi, ZH
英文摘要	Background and aims - Ligularia virgaurea is an invasive weed species in the alpine meadow community that contains allelopathic compounds, which may affect seed germination of other co-existent species. Material and methods - In a laboratory study, allelopathic effects of root, stem and leaf aqueous extracts of Ligularia virgaurea, were evaluated on seed germination of Bromus inermis, a native grass species. Key results - Results showed that root, stem and leaf extracts of Ligularia virgaurea significantly decreased the germination percentage, relative germination percentage, germination index and weighted germination index of Bromus inermis. First germination time and mean germination time of Bromus inermis were also delayed. The concentration of the extracts had no significant effects on the germination indices. The type of extract (root, stem or leaf), on the contrary, showed the following trend on the mean relative germination percentage: RGP leaf extract treatment > RGP stem extract treatment > RGP root extract treatment. The response index values of root, stem and leaf aqueous extracts differ as follows: RI root extracts > RI stem extracts > RI leaf extracts. Conclusion - Our results demonstrate that aqueous extracts of Ligularia virgaurea have a significant allelopathic inhibition on seed germination of Bromus inermis. The root extracts of Ligularia virgaurea have a greater inhibition effect on seed germination of Bromus inermis, relative to stern and the leaf extracts.
收录类别	SCI
语种	英语
公开日期	2012-06-01
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/4723]
专题	水土保持研究所_水保所知识产出(1956-2013)
推荐引用方式 GB/T 7714	Wu Gao-Lin,Ren Guo-Hua,Shi Zhi-Hua. Phytotoxic effects of a dominant weed Ligularia virgaurea on seed germination of Bromus inermis in an alpine meadow community[J]. PLANT ECOLOGY AND EVOLUTION,2011,114(3):275-280.
APA	Wu Gao-Lin,Ren Guo-Hua,&Shi Zhi-Hua.(2011).Phytotoxic effects of a dominant weed Ligularia virgaurea on seed germination of Bromus inermis in an alpine meadow community.PLANT ECOLOGY AND EVOLUTION,114(3),275-280.
MLA	Wu Gao-Lin,et al."Phytotoxic effects of a dominant weed Ligularia virgaurea on seed germination of Bromus inermis in an alpine meadow community".PLANT ECOLOGY AND EVOLUTION 114.3(2011):275-280.