Transition from a maternal to external nitrogen source in maize seedlings

K. Sabermanesh; L.R. Holtham; J. George; U. Roessner; B.A. Boughton; S. Heuer; M. Tester; D.C. Plett; T.P. Garnett

doi:10.1111/jipb.12525

Back

Transition from a maternal to external nitrogen source in maize seedlings

Journal article

Open access

Peer reviewed

Transition from a maternal to external nitrogen source in maize seedlings

K. Sabermanesh, L.R. Holtham, J. George, U. Roessner, B.A. Boughton, S. Heuer, M. Tester, D.C. Plett and T.P. Garnett

Journal of Integrative Plant Biology, Vol.59(4), pp.261-274

2017

DOI: https://doi.org/10.1111/jipb.12525

Files and links (2)

pdf

Transition from a maternal to external nitrogen source in maize seedlings.pdfDownload View

Published (Version of Record) Open Access

url

Free to Read *No subscription requiredView

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.

Details

Title: Transition from a maternal to external nitrogen source in maize seedlings
Authors/Creators: K. Sabermanesh (Author/Creator) - Australian Centre for Plant Functional Genomics
L.R. Holtham (Author/Creator) - Australian Centre for Plant Functional Genomics
J. George (Author/Creator) - Australian Centre for Plant Functional Genomics
U. Roessner (Author/Creator) - Australian Centre for Plant Functional Genomics
B.A. Boughton (Author/Creator) - The University of Melbourne
S. Heuer (Author/Creator) - Australian Centre for Plant Functional Genomics
M. Tester (Author/Creator) - Australian Centre for Plant Functional Genomics
D.C. Plett (Author/Creator) - Australian Centre for Plant Functional Genomics
T.P. Garnett (Author/Creator) - Australian Centre for Plant Functional Genomics
Publication Details: Journal of Integrative Plant Biology, Vol.59(4), pp.261-274
Publisher: John Wiley & Sons Australia, Ltd on behalf of Institute of Botany, Chinese Academy of Sciences
Identifiers: 991005544694007891
Copyright: © 2017 The Authors
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Journal article

UN Sustainable Development Goals (SDGs)

This output has contributed to the advancement of the following goals:

Source: InCites

Metrics

14 File views/ downloads

30 Record Views

10 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration; International collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.4 Crop Science; 3.4.1637 Plant Nitrogen Metabolism
Web Of Science research areas: Biochemistry & Molecular Biology; Plant Sciences
ESI research areas: Plant & Animal Science