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Absorption and Translocation of Simazine in Parrotfeather

Published online by Cambridge University Press:  12 June 2017

David L. Sutton  and
S. W. Bingham
David L. Sutton
Affiliation:
Department of Plant Pathology and Physiology, Virginia Polytechnic Institute, Blacksburg
S. W. Bingham
Affiliation:
Department of Plant Pathology and Physiology, Virginia Polytechnic Institute, Blacksburg
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Abstract

Root applications of 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine) at concentrations greater than 1.0 × 10-7M inhibited growth of parrotfeather (Myriophyllum brasiliense Camb.). Chromatographic analysis of exudate from detopped parrotfeather plants indicated that simazine was being tranlocated primarily as the intact molecule. A correlation coefficient of 0.985 was observed between the amount of simazine-14C removed from the treatment solution and transpiration during a 6-hr period. Absorption of simazine-14C by parrotfeather roots of intact plants was linear for the first 4 hr followed by a gradual decrease at the end of 6 hr. Simazine-14C at 1 and 2 hr after root applications was highest in the roots, intermediate in the lower part of the shoot, and lowest in the upper part of the shoot. After 192 hr, simazine-14C accumulated in the top of the shoot in a concentration higher than in the lower part of the shoot or the roots. A correlation coefficient of 0.988 was found between the amount of simazine-14C present in the tissue and the treatment concentration over a range of 1.2 × 10-6 to 5.0 × 10-6M.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 4 , October 1969 , pp. 431 - 435
Copyright
Copyright © 1969 Weed Science Society of America 

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References

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