Effeet of wild oat (Avena fatua L.) root exudates on seedlings of spring wheat (Triticum aestivum L.)

Francisco Pérez C.1 y Juan Ormeño N.2

Root exudates from the undisturbed root system ofwild oat (Avena fatua L.) seedlings were collected by a modification of the Tang & Young method. Exudates inhibited root and coleoptile growth of spring wheat (Triticum aestivum L.) seedlings. Scopoletin, coumarin, p-hydroxibenzoic and vanillic acid were identified from the root exudates by HPLC being scopoletin the main allelochemical determined.

Key words: allelophathy, wild oats, scopoletin, root exudates.

1 Universidad de Chile, Casilla 653, Santiago, Chile.
2 Estación Experimental La Platina (INlA), Casilla 439, Correo 3, Santiago, Chile.

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