Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/106137
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Transition from a maternal to external nitrogen source in maize seedlings |
Author: | Sabermanesh, K. Holtham, L. George, J. Roessner, U. Boughton, B. Heuer, S. Tester, M. Plett, D. Garnett, T. |
Citation: | Journal of Integrative Plant Biology, 2017; 59(4):261-274 |
Publisher: | Wiley |
Issue Date: | 2017 |
ISSN: | 1672-9072 1744-7909 |
Statement of Responsibility: | Kasra Sabermanesh, Luke R. Holtham, Jessey George, Ute Roessner, Berin A. Boughton, Sigrid Heuer, Mark Tester, Darren C. Plett and Trevor P. Garnett |
Abstract: | Maximizing NO₃¯ uptake during seedling development is important as it has a major influence on plant growth and yield. However, little is known about the processes leading to, and involved in, the initiation of root NO₃¯ uptake capacity in developing seedlings. This study examines the physiological processes involved in root NO₃¯ uptake and metabolism, to gain an understanding of how the NO₃¯ uptake system responds to meet demand as maize seedlings transition from seed N use to external N capture. The concentrations of seed-derived free amino acids within root and shoot tissues are initially high, but decrease rapidly until stabilizing eight days after imbibition (DAI). Similarly, shoot N% decreases, but does not stabilize until 12-13 DAI. Following the decrease in free amino acid concentrations, root NO₃¯ uptake capacity increases until shoot N% stabilizes. The increase in root NO₃¯ uptake capacity corresponds with a rapid rise in transcript levels of putative NO₃¯ transporters, ZmNRT2.1 and ZmNRT2.2. The processes underlying the increase in root NO₃¯ uptake capacity to meet N demand provide an insight into the processes controlling N uptake. |
Keywords: | Zea mays Plant Roots Nitrates Nitrogen Amino Acids Plant Proteins RNA, Messenger Gene Expression Regulation, Plant Nitrate Reductase Seedlings |
Rights: | © 2017 The Authors. Journal of Integrative Plant Biology Published by John Wiley & Sons Australia, Ltd on behalf of Institute of Botany, Chinese Academy of Sciences This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
DOI: | 10.1111/jipb.12525 |
Grant ID: | http://purl.org/au-research/grants/arc/LP130101055 |
Published version: | http://dx.doi.org/10.1111/jipb.12525 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 8 |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
hdl_106137.pdf | Published version | 1.96 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.