Imaging of the electrical activity in the root zone under limited-water-availability stress: a laboratory study for <i>Vitis vinifera</i>
<p>Understanding root signals and their consequences for the whole plant physiology is one of the keys to tackling the water-saving challenge in agriculture. The implementation of water-saving irrigation strategies, such as the partial root zone drying (PRD) method, is part of a comprehensive...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-11-01
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| Series: | Biogeosciences |
| Online Access: | https://bg.copernicus.org/articles/20/4625/2023/bg-20-4625-2023.pdf |
| _version_ | 1797450758264717312 |
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| author | B. Mary B. Mary V. Iván F. Meggio F. Meggio L. Peruzzo L. Peruzzo G. Blanchy C. Chou B. Ruperti B. Ruperti Y. Wu G. Cassiani |
| author_facet | B. Mary B. Mary V. Iván F. Meggio F. Meggio L. Peruzzo L. Peruzzo G. Blanchy C. Chou B. Ruperti B. Ruperti Y. Wu G. Cassiani |
| author_sort | B. Mary |
| collection | DOAJ |
| description | <p>Understanding root signals and their consequences for the whole plant physiology is one of the keys to tackling the water-saving challenge in agriculture. The implementation of water-saving irrigation strategies, such as the partial root zone drying (PRD) method, is part of a comprehensive approach to enhance water use efficiency. To reach this goal tools are needed for the evaluation of the root's and soil water dynamics in time and space. In controlled laboratory conditions, using a rhizotron built for geoelectrical tomography imaging, we monitored the spatio-temporal changes in soil electrical resistivity (ER) for more than a month corresponding to eight alternating water inputs cycles. Electrical resistivity tomography (ERT) was complemented with electrical current imaging (ECI) using plant-stem-induced electrical stimulation. To estimate soil water content in the rhizotron during the experiment, we incorporated Archie's law as a constitutive model. We demonstrated that under mild water stress conditions, it is practically impossible to spatially distinguish the limited-water-availability effects using ECI. We evidenced that the current source density spatial distribution varied during the course of the experiment with the transpiration demand but without any significant relationship to the soil water content changes. On the other hand, ERT showed spatial patterns associated with irrigation and, to a lesser degree, to RWU (root water uptake) and hydraulic redistribution. The interpretation of the geoelectrical imaging with respect to root activity was strengthened and correlated with indirect observations of the plant transpiration using a weight monitoring lysimeter and direct observation of the plant leaf gas exchanges.</p> |
| first_indexed | 2024-03-09T14:45:10Z |
| format | Article |
| id | doaj.art-2541719538cd4f30916672b569ed7fcd |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-03-09T14:45:10Z |
| publishDate | 2023-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-2541719538cd4f30916672b569ed7fcd2023-11-27T07:09:09ZengCopernicus PublicationsBiogeosciences1726-41701726-41892023-11-01204625465010.5194/bg-20-4625-2023Imaging of the electrical activity in the root zone under limited-water-availability stress: a laboratory study for <i>Vitis vinifera</i>B. Mary0B. Mary1V. Iván2F. Meggio3F. Meggio4L. Peruzzo5L. Peruzzo6G. Blanchy7C. Chou8B. Ruperti9B. Ruperti10Y. Wu11G. Cassiani12Dipartimento di Geoscienze, Università degli Studi di Padova, Padua, ItalyEarth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, Berkeley, California, USADipartimento di Geoscienze, Università degli Studi di Padova, Padua, ItalyDepartment of Agronomy, Food, Natural resources, Animals and Environment – DAFNAE, University of Padua, Agripolis, Viale dell'Università 16 – Legnaro (Padua), ItalyInterdepartmental Research Centre for Viticulture and Enology – CIRVE, University of Padua, Via XXVIII Aprile 14, Conegliano (Treviso), ItalyDipartimento di Geoscienze, Università degli Studi di Padova, Padua, ItalyEarth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, Berkeley, California, USAUrban and Environmental Engineering, University of Liège (ULiege), Liège, BelgiumEarth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, Berkeley, California, USADepartment of Agronomy, Food, Natural resources, Animals and Environment – DAFNAE, University of Padua, Agripolis, Viale dell'Università 16 – Legnaro (Padua), ItalyInterdepartmental Research Centre for Viticulture and Enology – CIRVE, University of Padua, Via XXVIII Aprile 14, Conegliano (Treviso), ItalyEarth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, Berkeley, California, USADipartimento di Geoscienze, Università degli Studi di Padova, Padua, Italy<p>Understanding root signals and their consequences for the whole plant physiology is one of the keys to tackling the water-saving challenge in agriculture. The implementation of water-saving irrigation strategies, such as the partial root zone drying (PRD) method, is part of a comprehensive approach to enhance water use efficiency. To reach this goal tools are needed for the evaluation of the root's and soil water dynamics in time and space. In controlled laboratory conditions, using a rhizotron built for geoelectrical tomography imaging, we monitored the spatio-temporal changes in soil electrical resistivity (ER) for more than a month corresponding to eight alternating water inputs cycles. Electrical resistivity tomography (ERT) was complemented with electrical current imaging (ECI) using plant-stem-induced electrical stimulation. To estimate soil water content in the rhizotron during the experiment, we incorporated Archie's law as a constitutive model. We demonstrated that under mild water stress conditions, it is practically impossible to spatially distinguish the limited-water-availability effects using ECI. We evidenced that the current source density spatial distribution varied during the course of the experiment with the transpiration demand but without any significant relationship to the soil water content changes. On the other hand, ERT showed spatial patterns associated with irrigation and, to a lesser degree, to RWU (root water uptake) and hydraulic redistribution. The interpretation of the geoelectrical imaging with respect to root activity was strengthened and correlated with indirect observations of the plant transpiration using a weight monitoring lysimeter and direct observation of the plant leaf gas exchanges.</p>https://bg.copernicus.org/articles/20/4625/2023/bg-20-4625-2023.pdf |
| spellingShingle | B. Mary B. Mary V. Iván F. Meggio F. Meggio L. Peruzzo L. Peruzzo G. Blanchy C. Chou B. Ruperti B. Ruperti Y. Wu G. Cassiani Imaging of the electrical activity in the root zone under limited-water-availability stress: a laboratory study for <i>Vitis vinifera</i> Biogeosciences |
| title | Imaging of the electrical activity in the root zone under limited-water-availability stress: a laboratory study for <i>Vitis vinifera</i> |
| title_full | Imaging of the electrical activity in the root zone under limited-water-availability stress: a laboratory study for <i>Vitis vinifera</i> |
| title_fullStr | Imaging of the electrical activity in the root zone under limited-water-availability stress: a laboratory study for <i>Vitis vinifera</i> |
| title_full_unstemmed | Imaging of the electrical activity in the root zone under limited-water-availability stress: a laboratory study for <i>Vitis vinifera</i> |
| title_short | Imaging of the electrical activity in the root zone under limited-water-availability stress: a laboratory study for <i>Vitis vinifera</i> |
| title_sort | imaging of the electrical activity in the root zone under limited water availability stress a laboratory study for i vitis vinifera i |
| url | https://bg.copernicus.org/articles/20/4625/2023/bg-20-4625-2023.pdf |
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