Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/103871
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Type: Journal article
Title: Identification and molecular characterization of the nicotianamine synthase gene family in bread wheat
Author: Bonneau, J.
Baumann, U.
Beasley, J.
Li, Y.
Johnson, A.
Citation: Plant Biotechnology Journal, 2016; 14(12):2228-2239
Publisher: Wiley-Blackwell
Issue Date: 2016
ISSN: 1467-7644
1467-7652
Statement of
Responsibility: 
Julien Bonneau, Ute Baumann, Jesse Beasley, Yuan Li and Alexander A. T. Johnson
Abstract: Nicotianamine (NA) is a non-protein amino acid involved in fundamental aspects of metal uptake, transport and homeostasis in all plants and constitutes the biosynthetic precursor of mugineic acid family phytosiderophores (MAs) in graminaceous plant species. Nicotianamine synthase (NAS) genes, which encode enzymes that synthesize NA from S-adenosyl-L-methionine (SAM), are differentially regulated by iron (Fe) status in most plant species and plant genomes have been found to contain anywhere from 1-9 NAS genes. This study describes the identification of 21 NAS genes in the hexaploid bread wheat (Triticum aestivum L.) genome and their phylogenetic classification into two distinct clades. The TaNAS genes are highly expressed during germination, seedling growth and reproductive development. Fourteen of the clade I NAS genes were up-regulated in root tissues under conditions of Fe deficiency. Protein sequence analyses revealed the presence of endocytosis motifs in all of the wheat NAS proteins as well as chloroplast, mitochondrial and secretory transit peptide signals in four proteins. These results greatly expand our knowledge of NAS gene families in graminaceous plant species as well as the genetics underlying Fe nutrition in bread wheat. This article is protected by copyright. All rights reserved.
Keywords: Triticum aestivum
gene expression
ion transport
iron
nutrient and metal transport
phytosiderophore
Rights: © 2016 The Authors. Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
DOI: 10.1111/pbi.12577
Grant ID: http://purl.org/au-research/grants/arc/LP130100785
http://purl.org/au-research/grants/arc/LP130100785
Published version: http://dx.doi.org/10.1111/pbi.12577
Appears in Collections:Agriculture, Food and Wine publications
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