Soil carbon dioxide venting through rice roots
The growth of rice in submerged soils depends on its ability to form continuous gas channels—aerenchyma—through which oxygen (O(2)) diffuses from the shoots to aerate the roots. Less well understood is the extent to which aerenchyma permits venting of respiratory carbon dioxide (CO(2)) in the opposi...
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ftpubmed:oai:pubmedcentral.nih.gov:6972674 2023-05-15T15:52:43+02:00 Soil carbon dioxide venting through rice roots Kirk, Guy J.D. Boghi, Andrea Affholder, Marie‐Cecile Keyes, Samuel D. Heppell, James Roose, Tiina 2019-08-19 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6972674/ http://www.ncbi.nlm.nih.gov/pubmed/31378945 https://doi.org/10.1111/pce.13638 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6972674/ http://www.ncbi.nlm.nih.gov/pubmed/31378945 http://dx.doi.org/10.1111/pce.13638 © 2019 The Authors. Plant, Cell & Environment published by John Wiley & Sons Ltd This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Original Articles Text 2019 ftpubmed https://doi.org/10.1111/pce.13638 2020-02-02T01:27:44Z The growth of rice in submerged soils depends on its ability to form continuous gas channels—aerenchyma—through which oxygen (O(2)) diffuses from the shoots to aerate the roots. Less well understood is the extent to which aerenchyma permits venting of respiratory carbon dioxide (CO(2)) in the opposite direction. Large, potentially toxic concentrations of dissolved CO(2) develop in submerged rice soils. We show using X‐ray computed tomography and image‐based mathematical modelling that CO(2) venting through rice roots is far greater than thought hitherto. We found rates of venting equivalent to a third of the daily CO(2) fixation in photosynthesis. Without this venting through the roots, the concentrations of CO(2) and associated bicarbonate (HCO(3) (−)) in root cells would have been well above levels known to be toxic to roots. Removal of CO(2) and hence carbonic acid (H(2)CO(3)) from the soil was sufficient to increase the pH in the rhizosphere close to the roots by 0.7 units, which is sufficient to solubilize or immobilize various nutrients and toxicants. A sensitivity analysis of the model showed that such changes are expected for a wide range of plant and soil conditions. Text Carbonic acid PubMed Central (PMC) Plant, Cell & Environment 42 12 3197 3207 |
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Original Articles Kirk, Guy J.D. Boghi, Andrea Affholder, Marie‐Cecile Keyes, Samuel D. Heppell, James Roose, Tiina Soil carbon dioxide venting through rice roots |
topic_facet |
Original Articles |
description |
The growth of rice in submerged soils depends on its ability to form continuous gas channels—aerenchyma—through which oxygen (O(2)) diffuses from the shoots to aerate the roots. Less well understood is the extent to which aerenchyma permits venting of respiratory carbon dioxide (CO(2)) in the opposite direction. Large, potentially toxic concentrations of dissolved CO(2) develop in submerged rice soils. We show using X‐ray computed tomography and image‐based mathematical modelling that CO(2) venting through rice roots is far greater than thought hitherto. We found rates of venting equivalent to a third of the daily CO(2) fixation in photosynthesis. Without this venting through the roots, the concentrations of CO(2) and associated bicarbonate (HCO(3) (−)) in root cells would have been well above levels known to be toxic to roots. Removal of CO(2) and hence carbonic acid (H(2)CO(3)) from the soil was sufficient to increase the pH in the rhizosphere close to the roots by 0.7 units, which is sufficient to solubilize or immobilize various nutrients and toxicants. A sensitivity analysis of the model showed that such changes are expected for a wide range of plant and soil conditions. |
format |
Text |
author |
Kirk, Guy J.D. Boghi, Andrea Affholder, Marie‐Cecile Keyes, Samuel D. Heppell, James Roose, Tiina |
author_facet |
Kirk, Guy J.D. Boghi, Andrea Affholder, Marie‐Cecile Keyes, Samuel D. Heppell, James Roose, Tiina |
author_sort |
Kirk, Guy J.D. |
title |
Soil carbon dioxide venting through rice roots |
title_short |
Soil carbon dioxide venting through rice roots |
title_full |
Soil carbon dioxide venting through rice roots |
title_fullStr |
Soil carbon dioxide venting through rice roots |
title_full_unstemmed |
Soil carbon dioxide venting through rice roots |
title_sort |
soil carbon dioxide venting through rice roots |
publisher |
John Wiley and Sons Inc. |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6972674/ http://www.ncbi.nlm.nih.gov/pubmed/31378945 https://doi.org/10.1111/pce.13638 |
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Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6972674/ http://www.ncbi.nlm.nih.gov/pubmed/31378945 http://dx.doi.org/10.1111/pce.13638 |
op_rights |
© 2019 The Authors. Plant, Cell & Environment published by John Wiley & Sons Ltd This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
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CC-BY |
op_doi |
https://doi.org/10.1111/pce.13638 |
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Plant, Cell & Environment |
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42 |
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12 |
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3197 |
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3207 |
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