Rasmussen, J., Gilroyed, B. H., Reuter, T., Badea, A., Eudes, F., Graf, R., Laroche, A., Kav, N. N. V. and McAllister, T. A. 2014. Efficiency of protein as a nitrogen source for wheat and morphological changes in roots exposed to high protein concentrations. Can. J. Plant Sci. 94: 603-613. Proteins of animal origin can enter the environment through application of agricultural by-products to arable or pastured land. In this study, wheat (Triticum aestivum cv. AC Andrew) was exposed to treatments with nitrogen (N) supplied as animal protein (bovine serum albumin; BSA), inorganic N or a combination of these sources at different iso-nitrogenous concentrations. Plant growth was assessed by monitoring both wet and dry mass of shoots and data showed that protein treatments did not differ (P>0.05) from controls lacking N. Analysis of N also showed that plants supplied with protein N displayed lower N (1.2-2.4%) concentration as compared with those supplied with inorganic N (up to 12.4%) with N remaining <2.4% even when the supply of protein was increased. Root morphology was altered in plants exposed to protein N concentrations >71 mM, with the development of knob-like outgrowths with unknown function or significance. This study provides evidence that wheat plantlets grown under sterile conditions are unable to utilize BSA as efficiently as NH4NO3 as a N source, but their roots exhibit a morphological response to protein.
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20 January 2014
Efficiency of protein as a nitrogen source for wheat and morphological changes in roots exposed to high protein concentrations
Jay Rasmussen,
Brandon H. Gilroyed,
Tim Reuter,
Ana Badea,
François Eudes,
Robert Graf,
André Laroche,
Nat N. V. Kav,
Tim A. McAllister
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Canadian Journal of Plant Science
Vol. 94 • No. 4
May 2014
Vol. 94 • No. 4
May 2014
Apport nutritif d'azote
blé
engrais organique
exploitation durable des terres
morphologie des racines
Nitrogen nutrition
Organic fertilizer