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Response of Soybean Mitochondria to Substituted Dinitroaniline Herbicides

Published online by Cambridge University Press:  12 June 2017

Barbara Wang
Affiliation:
Agron. Dep., Univ. of Arkansas, Fayetteville, AR 72701
Shirley Grooms
Affiliation:
Agron. Dep., Univ. of Arkansas, Fayetteville, AR 72701
R. E. Frans
Affiliation:
Agron. Dep., Univ. of Arkansas, Fayetteville, AR 72701

Abstract

Effects of the inhibitors DNP (2,4-dinitrophenol) and oligomycin, and the substituted dinitroaniline herbicides, trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine), nitralin [4-(methylsulfonyl)-2,6-dinitro-N,N-dipropylaniline], and oryzalin (3,5-dinitro-N4,N4-dipropylsulfanilamide) on mitochondrial tractions isolated from soybean (Glycine max L. ‘Lee’) hypocotyls were examined. Oryzalin and nitralin uncoupled succinate oxidation at the ADP-limited state 4, as did DNP. Trifluralin caused no effect on the second state 4, but inhibited oxidative phosphorylation in a manner similar to the effect of the energy-transfer inhibitor oligomycin. Studies of the interaction of these inhibitors indicate that the sites of action for these herbicides may be different.

Type
Research Article
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

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