The effects of N deposition on allelopathic potential of invasive plant Spartina alterniflora Loisel
文献类型： 外文期刊
作者： Li, F. R. 1 ; Liang, S. C. 1 ; Li, M. 1 ; Duan, L. L. 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Publ Monitoring Ctr Agroprod, Guangzhou 510640, Guangdong, Peoples R China
关键词： Allelopathic effect;aqueous extracts;biomass allocation;invasive plant;Lactuca sativa;lettuce;nitrogen input;root;shoot;Spartina alterniflora;wetland ecosystem
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： The elevated N inputs can enhance the competitive ability of exotic invasive species and further facilitate their spread. Allelopathic responses of invasive plant Spartina alterniflora Loisel to N deposition were still rarely studied. Thus, we investigated the effects of simulated N deposition on the growth and allelopathic potential of S. alterniflora. It would be helpful to reveal its invasive mechanism under the scenario of global change (N deposition). The results showed that both low and high level of nitrogen deposition significantly increased the leaf area, leaf weight, above-ground and below-ground biomass accumulation of S. alterniflora. The root and shoot extracts of S. alterniflora under different nitrogen deposition treatments inhibited the seed germination rate and root length of the recipient plant lettuce (Lactuca sativa). Under the low nitrogen deposition treatment, the allelopathic effects of shoots and roots extracts reached the maximum at 0.02 g.mL(-1) and 0.04 g.mL(-1) concentrations, respectively. Overall, the allelopathic effects of S. alterniflora under the low nitrogen deposition treatment were mostly stronger than control (no nitrogen application) and those under high nitrogen deposition treatment.
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