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Effects of Sc-0224 and Glyphosate On Free Amino Acids, Soluble Protein, and Protein Synthesis in Inflated Duckweed (Lemna Gibba)

Published online by Cambridge University Press:  12 June 2017

William E. Cooley  and
Chester L. Foy
William E. Cooley
Affiliation:
Dep. Plant Pathol., Physiol., Weed Sci., Virginia Polytech. Inst. State Univ., Blacksburg, VA 24061
Chester L. Foy
Affiliation:
Dep. Plant Pathol., Physiol., Weed Sci., Virginia Polytech. Inst. State Univ., Blacksburg, VA 24061
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Abstract

Effects of the herbicides SC-0224 and glyphosate on the pool levels of free amino acids, soluble protein, and protein synthesis in inflated duckweed were compared. SC-0224 caused larger increases than glyphosate in the pool levels of amino acids; the increases caused by SC-0224 were similar, however, to those caused by trimethylsulfonium iodide (TMS-I). Expressed on a per gram fresh weight basis, none of the treatments changed soluble protein or the incorporation of 14C-leucine into soluble protein. On a per flask basis (allowing for decreased growth in treated flasks), both herbicides and TMS-I decreased soluble protein and 14C-leucine incorporation. Decreases in soluble protein and 14C-leucine incorporation were equal for SC-0224 and TMS-I but larger than for glyphosate. These data indicate that differences in the phytotoxicity of SC-0224 and glyphosate may be due to the action of the trimethylsulfonium portion of the SC-0224 structure.

Keywords

Glyphosate, N-(phosphonomethyl)glycineSC-0224, trimethylsulfonium carboxymethyl-aminomethylphosphonateTMS-I, trimethylsulfonium iodideinflated duckweed, Lemna gibba L. # LEMGITrimethylsulfonium iodideLEMGI
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 40 , Issue 3 , September 1992 , pp. 345 - 350
Copyright
Copyright © 1992 by the Weed Science Society of America 

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