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PMID: 16666913 Published · ppublish English Journal Article

Inhibition of plant protoporphyrinogen oxidase by the herbicide acifluorfen-methyl.

Plant physiology ·Vol. 90 ·No. 4 ·1989-08-00 ·Pages 1239-42

Witkowski DA, Halling BP

Abstract

The effect of acifluorfen-methyl on tetrapyrrole synthesis in greening chloroplasts of Cucumis sativus was examined. Formation of Mg-proto-porphyrin IX from delta-aminolevulinate was reduced 98% by 10 micromolar acifluorfen-methyl. Conversion of protoporphyrin IX to Mg-protoporphyrin IX was unaffected, but protoporphyrin IX synthesis from delta-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. ((c) 1989 FMC Corporation. All rights reserved.).

Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Witkowski D A
FMC Corporation, Agricultural Chemical Group, Box 8, Princeton, New Jersey 08543.
Halling B P
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Article Info
Journal
Plant physiology
Abbr.
Plant Physiol
ISSN
0032-0889
DOI
10.1104/pp.90.4.1239
Published
1989-08-00
Pages
1239-42
Language
English
Region
United States
NLM ID
0401224
PMCID
PMC1061873
External Links
PubMed source DOI: 10.1104/pp.90.4.1239 PMC Full Text View journal details
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