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Simazine and Phosphorus Interactions in Red Pine Seedlings

Published online by Cambridge University Press:  12 June 2017

P. S. Dhillon ,
W. R. Byrnes  and
C. Merritt
P. S. Dhillon
Affiliation:
Community Development Counselling Service, Arlington, Virginia
W. R. Byrnes
Affiliation:
Purdue University, Lafayette, Indiana
C. Merritt
Affiliation:
Purdue University, Lafayette, Indiana
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Abstract

Uptake of phosphorus by red pine (Pinus resinosa Ait.) seedling roots from a medium containing .0015 ppm P32 was stimulated at 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine) levels of 5 and 10 ppmw but inhibited at higher levels of 15 and 20 ppmw. Concentrations of simazine between 5 and 20 ppmw resulted in increased translocation of phosphorus from roots to stem and needles with increasing incubation time from 12 to 96 hr. Combinations of simazine at 10 ppmw with P32 at concentrations above 20 ppm resulted in decreased phosphorus uptake for incubation periods less than 72 hr. Phosphorus content of stems was not greatly influenced by simazine treatment or P32 concentration, but phosphorus content of needles was significantly higher in response to simazine.

Type
Research Article
Information
Weeds , Volume 15 , Issue 4 , October 1967 , pp. 339 - 343
Copyright
Copyright © 1967 Weed Science Society of America 

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References

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