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Root type matters: measurement of water uptake by seminal, crown, and lateral roots in maize

The ability of plants to take up water from the soil depends on both the root architecture and the distribution and evolution of the hydraulic conductivities among root types and along the root length. The mature maize (Zea mays L.) root system is composed of primary, seminal, and crown roots togeth...

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Autores principales: Ahmed, Mutez Ali, Zarebanadkouki, Mohsen, Meunier, Félicien, Javaux, Mathieu, Kaestner, Anders, Carminati, Andrea
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6019006/
https://www.ncbi.nlm.nih.gov/pubmed/29304205
http://dx.doi.org/10.1093/jxb/erx439
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author Ahmed, Mutez Ali
Zarebanadkouki, Mohsen
Meunier, Félicien
Javaux, Mathieu
Kaestner, Anders
Carminati, Andrea
author_facet Ahmed, Mutez Ali
Zarebanadkouki, Mohsen
Meunier, Félicien
Javaux, Mathieu
Kaestner, Anders
Carminati, Andrea
author_sort Ahmed, Mutez Ali
collection PubMed
description The ability of plants to take up water from the soil depends on both the root architecture and the distribution and evolution of the hydraulic conductivities among root types and along the root length. The mature maize (Zea mays L.) root system is composed of primary, seminal, and crown roots together with their respective laterals. Our understanding of root water uptake of maize is largely based on measurements of primary and seminal roots. Crown roots might have a different ability to extract water from the soil, but their hydraulic function remains unknown. The aim of this study was to measure the location of water uptake in mature maize and investigate differences between seminal, crown, and lateral roots. Neutron radiography and injections of deuterated water were used to visualize the root architecture and water transport in 5-week-old maize root systems. Water was mainly taken up by crown roots. Seminal roots and their laterals, which were the main location of water uptake in younger plants, made a minor contribution to water uptake. In contrast to younger seminal roots, crown roots were also able to take up water from their most distal segments. The greater uptake of crown roots compared with seminal roots is explained by their higher axial conductivity in the proximal parts and by the fact that they are connected to the shoot above the seminal roots, which favors the propagation of xylem tension along the crown roots. The deeper water uptake of crown roots is explained by their shorter and fewer laterals, which decreases the dissipation of water potential along the roots.
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spelling pubmed-60190062018-07-09 Root type matters: measurement of water uptake by seminal, crown, and lateral roots in maize Ahmed, Mutez Ali Zarebanadkouki, Mohsen Meunier, Félicien Javaux, Mathieu Kaestner, Anders Carminati, Andrea J Exp Bot Research Papers The ability of plants to take up water from the soil depends on both the root architecture and the distribution and evolution of the hydraulic conductivities among root types and along the root length. The mature maize (Zea mays L.) root system is composed of primary, seminal, and crown roots together with their respective laterals. Our understanding of root water uptake of maize is largely based on measurements of primary and seminal roots. Crown roots might have a different ability to extract water from the soil, but their hydraulic function remains unknown. The aim of this study was to measure the location of water uptake in mature maize and investigate differences between seminal, crown, and lateral roots. Neutron radiography and injections of deuterated water were used to visualize the root architecture and water transport in 5-week-old maize root systems. Water was mainly taken up by crown roots. Seminal roots and their laterals, which were the main location of water uptake in younger plants, made a minor contribution to water uptake. In contrast to younger seminal roots, crown roots were also able to take up water from their most distal segments. The greater uptake of crown roots compared with seminal roots is explained by their higher axial conductivity in the proximal parts and by the fact that they are connected to the shoot above the seminal roots, which favors the propagation of xylem tension along the crown roots. The deeper water uptake of crown roots is explained by their shorter and fewer laterals, which decreases the dissipation of water potential along the roots. Oxford University Press 2018-02-20 2018-01-03 /pmc/articles/PMC6019006/ /pubmed/29304205 http://dx.doi.org/10.1093/jxb/erx439 Text en © The Author(s) 2018. Published by Oxford University Press on behalf of the Society for Experimental Biology. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Papers
Ahmed, Mutez Ali
Zarebanadkouki, Mohsen
Meunier, Félicien
Javaux, Mathieu
Kaestner, Anders
Carminati, Andrea
Root type matters: measurement of water uptake by seminal, crown, and lateral roots in maize
title Root type matters: measurement of water uptake by seminal, crown, and lateral roots in maize
title_full Root type matters: measurement of water uptake by seminal, crown, and lateral roots in maize
title_fullStr Root type matters: measurement of water uptake by seminal, crown, and lateral roots in maize
title_full_unstemmed Root type matters: measurement of water uptake by seminal, crown, and lateral roots in maize
title_short Root type matters: measurement of water uptake by seminal, crown, and lateral roots in maize
title_sort root type matters: measurement of water uptake by seminal, crown, and lateral roots in maize
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6019006/
https://www.ncbi.nlm.nih.gov/pubmed/29304205
http://dx.doi.org/10.1093/jxb/erx439
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