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Diuron Metabolism in Two Sugarcane (Saccharum officinarum) Cultivars

Published online by Cambridge University Press:  12 June 2017

Lii-Chyuan Liu
Affiliation:
Agric. Exp. Stn., Univ. of Puerto Rico, Mayaguez Campus, Rio Piedras, Puerto Rico 00928
R. H. Shimabukuro
Affiliation:
Metabolism and Radiation Res. Lab., Sci. Ed. Admin., U.S. Dep. Agric., Fargo, ND 58105
J. D. Nalewaja
Affiliation:
Agron. Dep., North Dakota State Univ., Fargo, ND 58105

Abstract

The uptake, distribution, and metabolism of diuron [3-(3,4-dichlorophenyl)-1,1-dimethylurea] by sugarcane (Saccharum officinarum L.) cultivars ‘PR980’ and ‘PR1048’ were determined 3 and 10 days after root treatment with 18.4 μM 14C-ring-labeled diuron. Uptake and distribution did not account for the differential tolerance of the two cultivars to diuron. Concentration of unmetabolized diuron was higher in the shoot and root of susceptible cultivar PR1048 than in tolerant cultivar PR980 at 3 and 10 days after treatment. The predominant metabolic pathway for diuron metabolism in both susceptible and tolerant sugarcane cultivars appeared to be the formation of mono-methyl diuron and its conjugation. The metabolic process was more rapid in PR980 than PR1048, apparently accounting for the tolerance of PR980.

Type
Research Article
Copyright
Copyright © 1978 by the Weed Science Society of America 

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