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Digitale Medien

Allelopathic Potential of Aquatic Plants Associated with Wild Rice (Zizania palustris): I. Bioassay with Plant and Lake Sediment Samples (1999)

Quayyum, H. A. ; Mallik, A. U. ; Lee, P. F.

Springer

Journal of chemical ecology 25 (1999), S. 209-220

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ISSN: 1573-1561

Schlagwort(e): Allelopathy ; aquatic plants ; growth inhibition ; lake sediments ; seedling bioassay ; wild rice ; Zizania palustris ; Eleocharis smallii ; Equisitum fluviatile ; Myriophyllum verticillatum ; Nuphar variegatum ; Nymphaea odorata ; Potamogeton natan ; Scirpus acutus ; Sparganium fluuctuans

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Chemie und Pharmazie

Notizen: Abstract The allelopathic potential of eight aquatic plants associated with wild rice was investigated using lettuce and wild rice seedling bioassays. Rhizome aqueous extracts of Scirpus acutus, Potamogeton natans, Nymphaea odorata, Nuphar variegatum; shoot extract of Eleocharis smallii; whole plant extract of Myriophyllum verticillatum; and leaf extract of P. natans significantly reduced the root length of lettuce and wild rice seedlings. The lettuce seedling bioassay was more sensitive than the wild rice bioassay. Shoot growth was less affected than the root growth. Water extract of sediments associated with the aquatic plants had little growth inhibitory effect on wild rice. Our study did not yield any conclusive evidence that the wild rice-associated aquatic plants have allelopathic effects on wild rice. We emphasize the use of target species as a bioassay material in allelopathic studies. Further investigation on allelopathic effects of lake sediments associated with the neighboring plants of wild rice is necessary to evaluate their ecological significance.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1020853620102

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Digitale Medien

Allelopathic Potential of Aquatic Plants Associated with Wild Rice: II. Isolation and Identification of Allelochemicals (1999)

Quayyum, H. A. ; Mallik, A. U. ; Orr, D. E. ; [weitere]

Springer

Journal of chemical ecology 25 (1999), S. 221-228

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ISSN: 1573-1561

Schlagwort(e): Allelochemicals ; Eleocharis smallii ; plant phenolics ; Scirpus acutus ; wild rice ; Zizania palustris

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Chemie und Pharmazie

Notizen: Abstract Aqueous extracts of rhizomes of Scirpus acutus and shoots of Eleocharis smallii were analyzed for the presence of phytotoxic compounds using ethyl acetate extraction. The organic fractions of the extract of Scirpus rhizomes contained lactic, succinic, fumaric, 2-hydroxysuccinic, 2-phenyl lactic, m-hydroxybenzoic, p-hydroxybenzoic, protocatechuic, dehydroabietic, and ferulic acids; p-hydroxybenzyl alcohol, p-hydroxyphenyl ethanol and catechin. The extract of Eleocharis shoots contained 4-methoxy phenol, benzofuran, benzene acetic acid, 1-hydroxy-5-methyl acetophenone, and 1,3,4-dimethoxyphenol ethanone identified by GC-Mass spectroscopy. The potential allelopathic effect of these compounds on wild rice under field conditions was discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1020805704172

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