H. Morinaka, Y. Kitamura, K. Tsuzuki
1993
Citations
0
Influential Citations
4
Citations
Journal
Journal of Weed Science and Technology
Abstract
Herbicidal selectivity of the new thiocarbamate compound pyributicarb [O-3-tert-butylphenyl 6-methoxy-2-pyridyl (methyl)-thiocarbamate] and its effect on plant metabolism were examined under root-applied condition.Gramineous plants such as barnyardgrass, crabgrass and corn were more susceptible to pyributicarb than broadleaved plants such as soybean and cucumber. Among the examined gramineous plants, rice was the most tolerant to the herbicide.Pyributicarb reduced the incorporation of 14C-acetate into lipid fraction in young corn root tips at 10-7 and 10-6M concentrations. Reduction of uptake and incorporation of other 14C-labeled precursors, 14C-thymine, 14C-uracil, 14C-leucine and 14C-glucose were not observed.Lipid fractions metabolized from 14C-acetate in corn roots under pyributicarb treatment (10-7 and 10-6M) were investigated by thin layer chromatography. Clear spots of squalene were detected in these lipid fractions; in the absence of pyributicarb, however, the spots of squalene decreased in size with the lapse of time. Thus, it was recognized that the herbicide induced the accumulation of squalene in corn roots.Pyributicarb appears to inhibit the squalene metabolism.