Search Results
You are looking at 1 - 2 of 2 items for
- Author or Editor: Subhash C. Domir x
Abstract
Two-year-old American sycamore (Platanus occidentalis L.) seedlings of 3 canopy sizes—small, medium, and large—were injected with 3 concentrations of dikegulac [2,3:4,6-bis-0 (1-methylethylidene)-O (-L-xylo-2-hexulofuranosonic acid]. At the end of the growing season, height increase, sprout length, number of new sprouts, and phytotoxicity were determined. The data suggest that canopy size significantly alters dikegulac influence on growth parameters of sycamore. Generally, an increase in canopy size resulted in a decrease in the effect of dikegulac on growth response of sycamore.
Abstract
Analysis with liquid scintillation spectrometry of extracts from red oak (Quercus rubra L.) injected with 14C-l,2-dihydro-3, 6-pyridazinedione (Maleic hydrazide or MH) or 14C-butanedioic acid mono-(2,2-dimethylhydrazide) (daminozide) indicated that both growth inhibitors were distributed acropetally as well as basipetally over a 22 day period. Acropetal movement however, was slower with 14C-MH than with 14C-daminozide. Between 3 and 22 days after injection, about 20% of the 14C was lost from plants treated with 14C-daminozide. Ionexchange and thin-layer chromatographic techniques showed that daminozide did not form any detectable metabolites, while MH formed a conjugate with glucose. With both chemicals 12 to 15% of the radioactivity was present in the bound form after 22 days and exudation of 14C from the roots was not detected.