Title page for ETD etd-05202010-020029
|Type of Document
||Jones, Donald W.
||Absorption, translocation, and fate of the herbicide, 2-(3,4- dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione, in cotton
|Couch, Huston B.
|Foy, Chester L.
|Bingham, S. Wayne
|Brown, Ross D. Jr.
|Hale, Maynard G.
|Date of Defense
Absorption, translocation, and metabolism of the l4C-labeled herbicide
(VCS-438) in cotton (Gossypium hirsutum L. 'Acala 4-42-77') were studied
using autoradiography, thin-layer chromatography, and counting. Foliar
penetration and acropetal distribution of 14C occurred within 3 hr and
increased with time. No basipetal translocation of 14C out of treated
leaves was detected after treatment. Radioactivity first occurred in
the leaf veins, then more generally in interveinal tissues distally
from the point of application. Absorption into roots of 30-day-old
plants via nutrient solution was rapid; translocation into stem and
leaves occurred 12 to 24 hr after treatment. Radioactivity was translocated
more rapidly in 40-day-old plants. l4C in leaves of root-treated
plants was first located in the veins, then distributed throughout
with accumulation of 14C in lysigenous glands and leaf margins.
Little l4C moved into young growing points; most accumulated in older
leaves. Heterocyclic ring-labeled and phenyl ring-labeled VCS-438- 14C
had similar distribution patterns of l4C, characteristic of compounds
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