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Simazine-Induced Nitrate Absorption Related to Plant Protein Content

Published online by Cambridge University Press:  12 June 2017

S. K. Ries  and
V. Wert
S. K. Ries
Affiliation:
Pesticide Res. Center, Michigan State Univ., East Lansing, MI 48823
V. Wert
Affiliation:
Pesticide Res. Center, Michigan State Univ., East Lansing, MI 48823
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Abstract

Barley (Hordeum vulgare L. ‘Coho’), rye (Secale cereale L. ‘MSU Exp.’) and oat (Avena sativa L. ‘Gary’) seedlings were grown in nutrient solutions containing 0 and 10−9 to 10−7 M concentrations of 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine). In kinetic studies with rye and barley seedlings, simazine increased water and nitrate uptake after 3 days' exposure to 10−9 M simazine compared to controls; there was no effect from 10−7 M simazine. The effect was manifested in an increase in both plant weight and total protein. After 12 days, companion plants treated with 10−7 M simazine were the same size as controls but contained a higher protein concentration especially in the shoots. Regression analyses showed that the simazine-induced increases in total nitrogen content of the three grain species were closely related to the nitrate and water uptake, whether manifested by greater plant growth or more protein per gram of plant.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 6 , November 1972 , pp. 569 - 572
Copyright
Copyright © 1972 Weed Science Society of America 

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References

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