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Baer GR, Collet GF. In Vivo Determination of Parameters of Nitrate Utilization in Wheat (Triticum aestivum L.) Seedlings Grown with Low Concentration of Nitrate in the Nutrient Solution. Plant Physiol. 1981;68(6):1237-43doi: 10.1104/pp.68.6.1237.
Baer, G. R., & Collet, G. F. (1981). In Vivo Determination of Parameters of Nitrate Utilization in Wheat (Triticum aestivum L.) Seedlings Grown with Low Concentration of Nitrate in the Nutrient Solution. Plant physiology, 68(6), 1237-43. https://doi.org/10.1104/pp.68.6.1237
Baer, G R, and Collet, G F. "In Vivo Determination of Parameters of Nitrate Utilization in Wheat (Triticum aestivum L.) Seedlings Grown with Low Concentration of Nitrate in the Nutrient Solution." Plant physiology vol. 68,6 (1981): 1237-43. doi: https://doi.org/10.1104/pp.68.6.1237
Baer GR, Collet GF. In Vivo Determination of Parameters of Nitrate Utilization in Wheat (Triticum aestivum L.) Seedlings Grown with Low Concentration of Nitrate in the Nutrient Solution. Plant Physiol. 1981 Dec;68(6):1237-43. doi: 10.1104/pp.68.6.1237. PMID: 16662085; PMCID: PMC426080.
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Plant Physiol. 1981 Dec;68(6):1237-43. doi: 10.1104/pp.68.6.1237.

In Vivo Determination of Parameters of Nitrate Utilization in Wheat (Triticum aestivum L.) Seedlings Grown with Low Concentration of Nitrate in the Nutrient Solution.

Plant physiology

G R Baer, G F Collet

Affiliations

  1. Station Fédérale de Recherches Agronomiques de Changins, CH-1260, Nyon, Switzerland.

PMID: 16662085 PMCID: PMC426080 DOI: 10.1104/pp.68.6.1237

Abstract

Six genotypes of winter wheat (Triticum aestivum L.) differing in grain protein concentration were grown on a nutrient solution containing low concentrations of NO(3) (-) (2 millimolar). Total NO(3) (-) uptake varied between genotypes but was not related to grain protein content. An in vivo nitrate reductase assay was used to determine the affinity of the enzyme for NO(3) (-), and large phenotypic variations were observed. In vivo estimations of the concentration and size of the metabolic pool were variable. However, the three genotypes with the higher ratios of metabolic pool size to leaf total NO(3) (-) concentration were the high protein varieties. It is proposed that a high affinity of nitrate reductase for nitrate might be a biochemical marker for the capacity of the plant to continue assimilating NO(3) (-) for a longer period during the last stage of growth.The potential use of such physiological criteria as markers is discussed, in particular with respect to breeding programs for the development of plants with efficient nitrogen utilization.

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