Inhibition of Plant Protoporphyrinogen Oxidase by the Herbicide Acifluorfen-Methyl
Open Access
- 1 August 1989
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 90 (4) , 1239-1242
- https://doi.org/10.1104/pp.90.4.1239
Abstract
The effect of acifluorfen-methyl on tetrapyrrole synthesis in greening chloroplasts of Cucumis sativus was examined. Formation of Mg-proto-porphyrin IX from δ-aminolevulinate was reduced 98% by 10 micromolar acifluorfen-methyl. Conversion of protoporphyrin IX to Mg-protoporphyrin IX was unaffected, but protoporphyrin IX synthesis from δ-aminolevulinate was blocked, indicating a site of inhibition prior to the Mg-chelatase. The enzymic oxidation of protoporphyrinogen IX to protoporphyrin IX was highly sensitive to acifluorfen-methyl, indicating that the site of action of the herbicide is the protoporphyrinogen oxidase. (© 1989 FMC Corporation. All rights reserved.)This publication has 19 references indexed in Scilit:
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