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Bioherbicidal activity of allelopathic bacteria against weeds associated with wheat and their effects on growth of wheat under axenic conditions

Abbas, Tasawar, Zahir, Zahir Ahmad, Naveed, Muhammad
BioControl 2017 v.62 no.5 pp. 719-730
Phalaris canariensis, allelopathy, bacteria, biological control, colonizing ability, germination, jars, oats, plant growth, sand, seeds, weeds, wheat
Allelopathic bacteria found to selectively inhibit weeds but not wheat in our earlier study were selected to evaluate their impact on three weeds and wheat under axenic conditions. Inoculated seeds of each species were sown in sand jars for 25 days. Results indicated that the applied strains variably inhibited germination of wild oat, little seed canary grass and broad leaved dock from 15.2 to 63.3, 18.5 to 58.7 and 18.4 to 60.5% and dry matter from 12.4 to 65, 22.8 to 81.4 and 21.7 to 71.3% than their controls, respectively. These effects were also evident in other growth parameters. Growth of wheat was significantly improved by four strains while others caused non-significant effects. Selectivity of these strains was also reflected in differential root colonization ability. These strains were characterized for various microbial and biochemical parameters. These strains may further be evaluated for their bioherbicidal activity under natural conditions.