TINNIN, R. O., anid C. H. MULLER (Uniiv. of Calif., Santa Barbara). The allelopathic inifluenee of Avena fatua: The allelopathic mechanism. Bull. Torrey Bot. Club 99: 287292. 1972.-The allelopathic mechanism associated with the straw of Avena fatua was inivestigated by bioassay and greenihouse experiments. Water leachates from the straw contained a group of phytotoxic pheniolic compounds. These compounids were inihibitory to germinationi anid seedlinig growth of other plant species in soil and are thought to be part of the toxic complex which is active in the field. We conielude that the phytotoxins are leached from the straw by the first rains of the growing season and are carried from the straw to the soil where they inhibit species with susceptible seeds or seedlinigs, e.g., Centaqtrea melitensis anid Silybunt marianum.
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Tinnin et al. (1972) studied this question.
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