Bioassay and anatomical study of BAS 517 using etiolated crop seedlings
1993
Li, H.Y. | Foy, C.L.
Laboratory experiments were conducted to determine the selectivity and inhibitory activity of BAS 517 using whole seedlings or root tips of corn and soybean. Effects of BAS 517 on the morphology of corn root tips were examined as well. Etiolated corn seedlings showed high sensitivity to BAS 517; soybean seedlings were not affected. Growth inhibition of corn varied with concentrations of BAS 517 and incubation time. Radicles of corn were more sensitive than mesocotyls and coleoptiles. Root meristems were the first to show symptoms (reddening tissue followed by cessation of root growth). Results using root tips were similar to those using whole seedlings. However, root tips appeared to be more sensitive than whole seedlings. Concentrations of 0.1 and 10 micromolars of BAS 517 caused severe vacuolization of cells in the 0.2-cm root tip of corn. A pattern of decreasing injury from epidermal cells toward the centers of roots was observed.
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