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Comparison of the Bleaching Activity of Norflurazon and Oxyfluorfen

Published online by Cambridge University Press:  12 June 2017

Gerhard Sandmann  and
Peter Böger
Gerhard Sandmann
Affiliation:
Lehrstuhl für Physiologie und Biochemie der Pflanzen, Universität Konstanz, D-7750 Konstanz, West-Germany
Peter Böger
Affiliation:
Lehrstuhl für Physiologie und Biochemie der Pflanzen, Universität Konstanz, D-7750 Konstanz, West-Germany
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Abstract

The bleaching effects of norflurazon [4-chloro-5-(methylamino)-2-(α,α,α-trifluoro-m-tolyl)-3 (2H)-pyridazinone] and of oxyfluorfen [2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl) benzene] were compared using the intact microalga Scenedesmus acutus and the fungus Phycomyces blakesleeanus. Under the influence of oxyfluorfen, but not of norflurazon, pigments and membranes were degraded. This activity is typical for oxyfluorfen. Norflurazon prevented carotene synthesis, but did not cause degradation of carotenoids, chlorophylls, or 35S-sulfolipid, a marker of photosynthetic membranes. Furthermore, light-induced ethane evolution by Scenedesmus is substantial with oxyfluorfen, but not with norflurazon present. Oxyfluorfen apparently causes radical-initiated peroxidation of polyunsaturated fatty acids.

Keywords

35S-suifolipid degradationethane formation
Type
Research Article
Information
Weed Science , Volume 31 , Issue 3 , May 1983 , pp. 338 - 341
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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