Type of Document	Dissertation
Author	Jones, Donald W.
URN	etd-05202010-020029
Title	Absorption, translocation, and fate of the herbicide, 2-(3,4- dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione, in cotton
Degree	PhD
Department	Plant Physiology
Advisory Committee	Advisor Name Title Couch, Huston B. Committee Chair Foy, Chester L. Committee Chair Bingham, S. Wayne Committee Member Brown, Ross D. Jr. Committee Member Hale, Maynard G. Committee Member
Keywords	cotton crop
Date of Defense	1971-08-05
Availability	restricted
Abstract Absorption, translocation, and metabolism of the l4C-labeled herbicide 2-(3,4-dichlorophenyl)-4-methyl-I,2,4-oxadiazolidine-3,5-dione (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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