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[1] Babourina O, Voltchanskii K, McGann B, Newman I, Rengel Z. Nitrate supply affects ammonium transport in canola roots. J Exp Bot, 2007, 58(3):651-658.
[2] Kunkel JG, S Cordeiro, Xu Y(J).Chapter V in Plant Electrophysiology - Theory and
Methods. Ed. Volkov AG . Berlin/Heidelberg: Springer-Verlag, 2005: 109-137.
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