Journal Article 2 AMT1 Ammonium Compounds Ammonium toxicity Arabidopsis Proteins Arabidopsis thaliana Auxin transport B-deficiency phenotype Boron Brassica napus Indoleacetic Acids N9E3X5056Q Primary root Reactive Oxygen Species Research Support, Non-U.S. Gov't Transcription Factors WRKY23 WRKY23 protein, Arabidopsis boron (B) efficiency differentially expressed genes genomic variations next-generation sequencing.