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The Effects of Dichlobenil on Assimilate Transport in Purple Nutsedge

Published online by Cambridge University Press:  12 June 2017

I. Okezie Akobundu ,
David E. Bayer  and
Oliver A. Leonard
I. Okezie Akobundu
Affiliation:
Department of Botany, University of California, Davis, California
David E. Bayer
Affiliation:
Department of Botany, University of California, Davis, California
Oliver A. Leonard
Affiliation:
Department of Botany, University of California, Davis, California
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Abstract

Assimilate transport in purple nutsedge (Cyperus rotundus L.) was studied using autoradiographic technique. Results show the basic pattern of assimilate distribution was from areas of synthesis to areas of use or accumulation. The initial underground centers of high metabolic activity were replaced as these organs matured, by new centers of actively growing rhizomes, tubers, and roots. The planted tuber did not accumulate assimilates. Treatment of purple nutsedge plants with 2,6-dichlorobenzonitrile (dichlobenil) resulted in accumulation of assimilates in the tubers rather than in young underground tissues. Leaves of treated plants also accumulated labeled assimilate in excess of control plants. Assimilate accumulation in leaves of dichlobenil-treated plants resulted from the destruction of the phloem in the basal portions of the leaf-sheaths. An increase in tuber respiration accompanied an increase in accumulation of assimilates in dichlobenil treated tubers.

Type
Research Article
Information
Weed Science , Volume 18 , Issue 3 , May 1970 , pp. 403 - 408
Copyright
Copyright © 1970 Weed Science Society of America 

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References

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