Mode of Action of a Herbicide: Johnsongrass and Methanearsonic Acid

Knowles , F.C. and Benson, A.A. (1983) Mode of Action of a Herbicide: Johnsongrass and Methanearsonic Acid. Plant Physiology, 71 (2). pp. 235-240.

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Johnsongrass (Sorghum halepense (L.) Pers.) is sensitive to methanearsonate, foliar application resulting in a topkill. Investigation of the pattern of photosynthesis by radioautography revealed an accumulation of malate in methanearsonate-treated leaves. Accumulation of malate was attributed to an inhibition of NADP+-malic enzyme which was found to be sensitive to sulfhydryl group reagents including arsenosomethane, CH3AsO. Methanearsonate was found to act as an oxidant in the Hill reaction using spinach chloroplasts, the photoproduct being a sulfhydryl group reagent

Item Type: Article
Author Affiliation: Marine Biology Research Division, A-002, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093
Subjects: Environmental Science
Divisions: Other Crops
Depositing User: Ms K Syamalamba
Date Deposited: 08 Mar 2012 03:45
Last Modified: 08 Mar 2012 03:45
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