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Root hair phenotypes influence nitrogen acquisition in maize
BACKGROUND AND AIMS: The utility of root hairs for nitrogen (N) acquisition is poorly understood. METHODS: We explored the utility of root hairs for N acquisition in the functional–structural model SimRoot and with maize genotypes with variable root hair length (RHL) in greenhouse and field environm...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8577201/ https://www.ncbi.nlm.nih.gov/pubmed/34355736 http://dx.doi.org/10.1093/aob/mcab104 |
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author | Saengwilai, Patompong Strock, Christopher Rangarajan, Harini Chimungu, Joseph Salungyu, Jirawat Lynch, Jonathan P |
author_facet | Saengwilai, Patompong Strock, Christopher Rangarajan, Harini Chimungu, Joseph Salungyu, Jirawat Lynch, Jonathan P |
author_sort | Saengwilai, Patompong |
collection | PubMed |
description | BACKGROUND AND AIMS: The utility of root hairs for nitrogen (N) acquisition is poorly understood. METHODS: We explored the utility of root hairs for N acquisition in the functional–structural model SimRoot and with maize genotypes with variable root hair length (RHL) in greenhouse and field environments. KEY RESULTS: Simulation results indicate that long, dense root hairs can improve N acquisition under varying N availability. In the greenhouse, ammonium availability had no effect on RHL and low nitrate availability increased RHL, while in the field low N reduced RHL. Longer RHL was associated with 216 % increase in biomass and 237 % increase in plant N content under low-N conditions in the greenhouse and a 250 % increase in biomass and 200 % increase in plant N content in the field compared with short-RHL phenotypes. In a low-N field environment, genotypes with long RHL had 267 % greater yield than those with short RHL. We speculate that long root hairs improve N capture by increased root surface area and expanded soil exploration beyond the N depletion zone surrounding the root surface. CONCLUSIONS: We conclude that root hairs play an important role in N acquisition. We suggest that root hairs merit consideration as a breeding target for improved N acquisition in maize and other crops. |
format | Online Article Text |
id | pubmed-8577201 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-85772012021-11-10 Root hair phenotypes influence nitrogen acquisition in maize Saengwilai, Patompong Strock, Christopher Rangarajan, Harini Chimungu, Joseph Salungyu, Jirawat Lynch, Jonathan P Ann Bot Original Articles BACKGROUND AND AIMS: The utility of root hairs for nitrogen (N) acquisition is poorly understood. METHODS: We explored the utility of root hairs for N acquisition in the functional–structural model SimRoot and with maize genotypes with variable root hair length (RHL) in greenhouse and field environments. KEY RESULTS: Simulation results indicate that long, dense root hairs can improve N acquisition under varying N availability. In the greenhouse, ammonium availability had no effect on RHL and low nitrate availability increased RHL, while in the field low N reduced RHL. Longer RHL was associated with 216 % increase in biomass and 237 % increase in plant N content under low-N conditions in the greenhouse and a 250 % increase in biomass and 200 % increase in plant N content in the field compared with short-RHL phenotypes. In a low-N field environment, genotypes with long RHL had 267 % greater yield than those with short RHL. We speculate that long root hairs improve N capture by increased root surface area and expanded soil exploration beyond the N depletion zone surrounding the root surface. CONCLUSIONS: We conclude that root hairs play an important role in N acquisition. We suggest that root hairs merit consideration as a breeding target for improved N acquisition in maize and other crops. Oxford University Press 2021-08-06 /pmc/articles/PMC8577201/ /pubmed/34355736 http://dx.doi.org/10.1093/aob/mcab104 Text en © The Author(s) 2021. Published by Oxford University Press on behalf of the Annals of Botany Company. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Articles Saengwilai, Patompong Strock, Christopher Rangarajan, Harini Chimungu, Joseph Salungyu, Jirawat Lynch, Jonathan P Root hair phenotypes influence nitrogen acquisition in maize |
title | Root hair phenotypes influence nitrogen acquisition in maize |
title_full | Root hair phenotypes influence nitrogen acquisition in maize |
title_fullStr | Root hair phenotypes influence nitrogen acquisition in maize |
title_full_unstemmed | Root hair phenotypes influence nitrogen acquisition in maize |
title_short | Root hair phenotypes influence nitrogen acquisition in maize |
title_sort | root hair phenotypes influence nitrogen acquisition in maize |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8577201/ https://www.ncbi.nlm.nih.gov/pubmed/34355736 http://dx.doi.org/10.1093/aob/mcab104 |
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