Relationship between behavior of dehydromatricaria ester in soil and the allelopathic activity of Solidago altissima L. in the laboratory
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- 作者：K. Kobayashi ; H. Koyama and I.S. Shim
- 关键词：adsorption ; allelopathy ; dehydromatricaria ester (DME) ; downward movement ; soil water ; Solidago altissima
- 刊名：Plant and Soil
- 出版年：2004
- 出版时间：February, 2004
- 年：2004
- 卷：259
- 期：1-2
- 页码：97-102
- 全文大小：5.8 KB
文摘
In order to provide a better understanding of dehydromatricaria ester (DME), a polyacetylene compound extracted from Solidago altissima L. implication for the allelopathic activity under natural conditions, the behavior and the phytotoxic activity of DME treated to Ryugasaki sandy loam and Tennodai light clay were investigated in the laboratory. DME was determined by high performance liquid chromatographic analysis. The phytotoxic activity was more noticeable in Ryugasaki soil than in Tennodai soil. Immediately after treatment, the amount of DME on soil solids was much greater in Tennodai soil than in Ryugasaki soil, whereas its concentration in soil water was higher in Ryugasaki soil than in Tennodai soil. The DME concentration in soil water and the amount adsorbed on soil solids decreased with time after application. However, the concentration in soil water was higher in Ryugasaki soil than in Tennodai soil throughout the experimental period. When DME was applied to the top soil under water leaching conditions, the DME content was much greater in the upper soil layers than in the deeper soil layers in both soils. However, the concentration in soil water was much less in Tennodai soil than in Ryugasaki soil. It is suggested that the phytotoxic activity of DME depends on its concentration in soil water, which is affected by soil characteristics through its adsorption and degradation activity of the soil. It can be tentatively concluded that DME released from S. altissima actually causes little allelopathic activity on the competitive plants in most soils in natural ecosystems.