Allelopathic potential of wild oat (Avena fatua) on spring wheat (Triticum aestivum) growth

Schumacher, W.J.; Thill, D.C.; Lee, G.A.

Journal of Chemical Ecology 9(8): 1235-1245

1983


ISSN/ISBN: 0098-0331
PMID: 24407814
DOI: 10.1007/bf00982225
Accession: 001159746

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Abstract
Root exudates were extracted from sand containing A. fatua plants at the 1-, 2-, 3- and 4-leaf stages and added to sand containing wheat at corresponding stages of development. Leaf and root dry wt. of wheat were significantly reduced by A. fatua exudates at the 2- and 4-leaf stages, resp. Allelochemicals were isolated from A. fatua exudates at various growth stages. Paper chromatography indicated that at least 2 unknown compounds were present whose RF values in benzene/acetic acid/water (0.825 and 0.930) were similar to scopoletin and vanillic acid, resp. Additional tests using diazotized p-nitraniline, UV absorption spectra and gas chromatography indicated that the compounds were coumarin-related compounds such as scopoletin and vanillic acid.

Allelopathic potential of wild oat (Avena fatua) on spring wheat (Triticum aestivum) growth