High Level of <i>Nicotianamine Synthase </i>(<i>NAS3</i>) and <i>Natural Resistance Associated Macrophage Protein</i> (<i>NRAMP4</i>) Gene Transcription Induced by Potassium Nitrate in Trembling Aspen (<i>Populus tremuloides</i>)
American journal of biochemistry & biotechnology/American journal of biochemistry and biotechnology