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Influence of 2,4-D, Dicamba, and Naptalam on Hormonal Control of Dipeptidase

Published online by Cambridge University Press:  12 June 2017

R. Tsay  and
F. M. Ashton
R. Tsay
Affiliation:
Dep. of Bot., Univ. of California, Davis, CA 95616
F. M. Ashton
Affiliation:
Dep. of Bot., Univ. of California, Davis, CA 95616
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Abstract

The plant hormones gibberellic acid (GA) and benzyladenine (BA) stimulated the development of dipeptidase activity in distal-half cotyledons of squash (Cucurbita maxima Duch. ‘Chicago Warted Hubbard’). The herbicides 2,4-D [(2,4-dichlorophenoxy)acetic acid], dicamba (3,6-dichloro-o-anisic acid), and naptalam (N-1-napthylphalamic acid) inhibited the development of dipeptidase activity in this tissue. Herbicide concentrations which inhibited the development of this enzyme activity about 30% were used for the herbicidehormone interaction study. The addition of GA or BA counteracted the inhibition induced by 2,4-D and naptalam. Neither hormone grossly altered the inhibition induced by dicamba; however, BA did significantly reduce the inhibition caused by dicamba.

Type
Research Article
Information
Weed Science , Volume 22 , Issue 1 , January 1974 , pp. 72 - 74
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

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