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Temperature Effects on Absorption and Translocation of Trifluralin and Methazole in Peanuts

Published online by Cambridge University Press:  12 June 2017

K. Hawxby ,
E. Basler  and
P. W. Santelmann
K. Hawxby
Affiliation:
Dep. of Bot., Oklahoma State Univ., Stillwater, Oklahoma 74074
E. Basler
Affiliation:
Plant Path., Oklahoma State Univ., Stillwater, Oklahoma 74074
P. W. Santelmann
Affiliation:
Dep. of Agron., Oklahoma State Univ., Stillwater, Oklahoma 74074
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Abstract

The absorption and translocation of 14C-labeled α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) and 2-(3,4-dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione methazole from nutrient solutions of various temperatures by (Arachis hypogaea L. ‘Starr’) seedlings were determined. The accumulation of trifluralin in roots at 24 hr after exposure to trifluralin was greatest at 21 C and decreased at higher temperatures up to 38 C. The amounts of trifluralin translocated and accumulated in hypocotyls, tops, and cotyledons were small but generally increased with temperature. The initial rate of absorption of trifluralin was greater in excised lateral root tips than in tap root tips, but there was a greater accumulation in excised tap roots at 24 hr. The initial rates of absorption were higher for excised lateral roots at high temperatures. Total absorption of trifluralin at equilibrium was not proportional to the initial rates of absorption but was highest at low (21 C) and high (38 C) temperatures for excised lateral roots. The absorption of methazole by roots and translocation to other plant parts increased linearly with temperature, and it tended to accumulate in the mature leaf tissue.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 4 , July 1972 , pp. 285 - 289
Copyright
Copyright © Weed Science Society of America 

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References

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