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Physiological Responses to Fluazifop-Butyl in Tissue of Corn (Zea mays) and Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Robert S. Peregoy  and
Scott Glenn
Robert S. Peregoy
Affiliation:
Agron. Dep., Univ. of Maryland, College Park, MD 20742
Scott Glenn
Affiliation:
Agron. Dep., Univ. of Maryland, College Park, MD 20742
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Abstract

Effects of fluazifop-butyl {(±)-butyl 2-[4-[(5-(trifluoromethyl)-2-pyridinyl)oxy] phenoxy] propanoate} on cellular uptake and incorporation of 14C-leucine, 14C-uridine, and 14C-thymidine into protein, RNA, and DNA, respectively, were evaluated in corn (Zea mays L.) coleoptiles and soybean [Glycine max (L.) Merr.] hypocotyls. Uptake of 14C-leucine in corn coleoptiles was inhibited by fluazifop-butyl at 10-4 to 10-7 M, which was related to reductions in incorporation of 14C-leucine into protein at 10-4 to 10-6 M. The effect of fluazifop-butyl on 14C-leucine uptake and incorporation was reduced by 2 × 10-6 M 2,4-D [(2,4-dichlorophenoxy)acetic acid], indicating antagonism between these herbicides. RNA and DNA synthesis were inhibited at 10-5 and 10-4 M. Protein synthesis in soybean hypocotyls was stimulated by 10-7 and 10-6 M fluazifop-butyl 33 and 27%, respectively, and inhibited by 10-4 M 50%. RNA and DNA synthesis were also inhibited by 10-4 M in soybean.

Keywords

Protein synthesisRNA synthesisDNA synthesis24-DZea maysGlycine max
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 33 , Issue 4 , July 1985 , pp. 443 - 446
Copyright
Copyright © 1985 by the Weed Science Society of America 

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