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Transition from a maternal to external nitrogen source in maize seedlings

Maximizing NO(3) (−) 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 NO(3) (−) uptake capacity in developing seedlings. This study examines the phys...

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Autores principales: Sabermanesh, Kasra, Holtham, Luke R., George, Jessey, Roessner, Ute, Boughton, Berin A., Heuer, Sigrid, Tester, Mark, Plett, Darren C., Garnett, Trevor P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5413817/
https://www.ncbi.nlm.nih.gov/pubmed/28169508
http://dx.doi.org/10.1111/jipb.12525
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author Sabermanesh, Kasra
Holtham, Luke R.
George, Jessey
Roessner, Ute
Boughton, Berin A.
Heuer, Sigrid
Tester, Mark
Plett, Darren C.
Garnett, Trevor P.
author_facet Sabermanesh, Kasra
Holtham, Luke R.
George, Jessey
Roessner, Ute
Boughton, Berin A.
Heuer, Sigrid
Tester, Mark
Plett, Darren C.
Garnett, Trevor P.
author_sort Sabermanesh, Kasra
collection PubMed
description Maximizing NO(3) (−) 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 NO(3) (−) uptake capacity in developing seedlings. This study examines the physiological processes involved in root NO(3) (−) uptake and metabolism, to gain an understanding of how the NO(3) (−) 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 NO(3) (−) uptake capacity increases until shoot N% stabilizes. The increase in root NO(3) (−) uptake capacity corresponds with a rapid rise in transcript levels of putative NO(3) (−) transporters, ZmNRT2.1 and ZmNRT2.2. The processes underlying the increase in root NO(3) (−) uptake capacity to meet N demand provide an insight into the processes controlling N uptake.
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spelling pubmed-54138172017-05-15 Transition from a maternal to external nitrogen source in maize seedlings Sabermanesh, Kasra Holtham, Luke R. George, Jessey Roessner, Ute Boughton, Berin A. Heuer, Sigrid Tester, Mark Plett, Darren C. Garnett, Trevor P. J Integr Plant Biol Research Article Maximizing NO(3) (−) 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 NO(3) (−) uptake capacity in developing seedlings. This study examines the physiological processes involved in root NO(3) (−) uptake and metabolism, to gain an understanding of how the NO(3) (−) 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 NO(3) (−) uptake capacity increases until shoot N% stabilizes. The increase in root NO(3) (−) uptake capacity corresponds with a rapid rise in transcript levels of putative NO(3) (−) transporters, ZmNRT2.1 and ZmNRT2.2. The processes underlying the increase in root NO(3) (−) uptake capacity to meet N demand provide an insight into the processes controlling N uptake. John Wiley and Sons Inc. 2017-04-07 2017-04 /pmc/articles/PMC5413817/ /pubmed/28169508 http://dx.doi.org/10.1111/jipb.12525 Text en © 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 (http://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Research Article
Sabermanesh, Kasra
Holtham, Luke R.
George, Jessey
Roessner, Ute
Boughton, Berin A.
Heuer, Sigrid
Tester, Mark
Plett, Darren C.
Garnett, Trevor P.
Transition from a maternal to external nitrogen source in maize seedlings
title Transition from a maternal to external nitrogen source in maize seedlings
title_full Transition from a maternal to external nitrogen source in maize seedlings
title_fullStr Transition from a maternal to external nitrogen source in maize seedlings
title_full_unstemmed Transition from a maternal to external nitrogen source in maize seedlings
title_short Transition from a maternal to external nitrogen source in maize seedlings
title_sort transition from a maternal to external nitrogen source in maize seedlings
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5413817/
https://www.ncbi.nlm.nih.gov/pubmed/28169508
http://dx.doi.org/10.1111/jipb.12525
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