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Effects of Trifluralin on Root Morphology and Mineral Status of Wheat (Triticum aestivum) Seedlings

Published online by Cambridge University Press:  12 June 2017

Barry M. Olson ,
Robert B. McKercher  and
Edward H. Halstead
Barry M. Olson
Affiliation:
Sask. Inst. of Pedology, Univ. of Sask., Saskatoon, Sask., S7N OWO, Canada
Robert B. McKercher
Affiliation:
Sask. Inst. of Pedology, Univ. of Sask., Saskatoon, Sask., S7N OWO, Canada
Edward H. Halstead
Affiliation:
Sask. Inst. of Pedology, Univ. of Sask., Saskatoon, Sask., S7N OWO, Canada
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Abstract

Growth chamber studies using one soil investigated the effects of trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) at 0.0, 0.4, and 0.8 ppmw on the root development and the mineral status of wheat (Triticum aestivum L. ‘Neepawa’) seedlings. The 0.8-ppmw trifluralin rate increased the number of seminal roots, reduced lateral root production, decreased root extension, caused root tips to swell (club-like appearance), and reduced root dry weights. However, 0.4-ppmw trifluralin caused only slight damage to the seedlings. Towards the end of the two-week growth period, damaged seedlings showed signs of recovery, which included an increased number of seminal roots, development of normal root extensions from clubbed root tips, and development of normal lateral root patterns. Trifluralin increased percent calcium and magnesium and decreased percent nitrogen, phosphorus, and potassium in wheat plants. The nutrient concentrations were more affected in 21-day-old plants than in 35-day-old plants, indicating the wheat seedlings were able to recover from trifluralin injury.

Keywords

Phytotoxicityroot development
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 32 , Issue 3 , May 1984 , pp. 382 - 387
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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