Soil carbon dioxide venting through rice roots
Abstract 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 t...
Published in: | Plant, Cell & Environment |
---|---|
Main Authors: | , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/pce.13638 https://onlinelibrary.wiley.com/doi/pdf/10.1111/pce.13638 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/pce.13638 |
id |
crwiley:10.1111/pce.13638 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/pce.13638 2024-04-28T08:15:39+00:00 Soil carbon dioxide venting through rice roots Kirk, Guy J.D. Boghi, Andrea Affholder, Marie‐Cecile Keyes, Samuel D. Heppell, James Roose, Tiina Biotechnology and Biological Sciences Research Council 2019 http://dx.doi.org/10.1111/pce.13638 https://onlinelibrary.wiley.com/doi/pdf/10.1111/pce.13638 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/pce.13638 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Plant, Cell & Environment volume 42, issue 12, page 3197-3207 ISSN 0140-7791 1365-3040 Plant Science Physiology journal-article 2019 crwiley https://doi.org/10.1111/pce.13638 2024-04-02T08:46:36Z Abstract 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. Article in Journal/Newspaper Carbonic acid Wiley Online Library Plant, Cell & Environment 42 12 3197 3207 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Plant Science Physiology |
spellingShingle |
Plant Science Physiology 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 |
Plant Science Physiology |
description |
Abstract 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. |
author2 |
Biotechnology and Biological Sciences Research Council |
format |
Article in Journal/Newspaper |
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 |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/pce.13638 https://onlinelibrary.wiley.com/doi/pdf/10.1111/pce.13638 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/pce.13638 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Plant, Cell & Environment volume 42, issue 12, page 3197-3207 ISSN 0140-7791 1365-3040 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/pce.13638 |
container_title |
Plant, Cell & Environment |
container_volume |
42 |
container_issue |
12 |
container_start_page |
3197 |
op_container_end_page |
3207 |
_version_ |
1797581111124033536 |