Effect of irrigation management on the relationship between stomatal conductance and stem water potential on cv. Cabernet Sauvignon
Water relations in vineyards have been largely studied; giving insides regarding the way grapevine interacts with its environment according to water availability, providing us terminologies like Isohydric and Anisohydric, which have been applied to categorize cultivars and rootstocks. Recently, the...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | BIO Web of Conferences |
| Online Access: | https://www.bio-conferences.org/articles/bioconf/full_html/2023/01/bioconf_oiv2022_01012/bioconf_oiv2022_01012.html |
| _version_ | 1811157572569268224 |
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| author | Sebastian Vargas Nicolas Osorio Alvaro González Samuel Ortega-Farías |
| author_facet | Sebastian Vargas Nicolas Osorio Alvaro González Samuel Ortega-Farías |
| author_sort | Sebastian Vargas |
| collection | DOAJ |
| description | Water relations in vineyards have been largely studied; giving insides regarding the way grapevine interacts with its environment according to water availability, providing us terminologies like Isohydric and Anisohydric, which have been applied to categorize cultivars and rootstocks. Recently, the use of this terminology has been subjected to discussion regarding its use as a category to describe and separate grapevine cultivars instead of using it as a continuous, where grapevines can behave more iso or anysohidric depending on the environment where they are grown. In this study, using a deficit irrigation (RDI) trial in a commercial vineyard located in Maule Valley in Central Chile, the relationship between Midday Stem Water Potential (ψx), Stomatal Conductance (gs), Soil Water Content (WC), and Vapour Pressure Deficit (VPD) on cv. Cabernet Sauvignon was studied, a grape variety that has been classified as isohydric. The trial was carried out for 3 years from 2018 to 2020 in which four RDI treatments were employed to replenish different portions of evapotranspiration (ET) from pea-size until harvest. These irrigation treatments were conceived as 100% ET, 70% ET, 50-100% ET (50% ET before veraison and 100% ET afterwards) and 35-100% ET (35% ET before veraison and 100% ET afterwards). Findings in this study show how the relationship between ψx and gs is treatment dependent; in treatments where no water deficit was imposed a weaker relationship between the variables was observed, showing a large variation between gs at similar ψx, being gs more dependent on VPD compared to the treatments with a larger deficit on its irrigation. As the deficit irrigation increased, grapevines started to shift to a smaller variation on its gs over large variations on its ψx. This result shows that irrigation management and deficit irrigation strategies impact the way plants react to water availability and leads to different behavior on its gs/ψx relationship. |
| first_indexed | 2024-04-10T05:09:32Z |
| format | Article |
| id | doaj.art-8bdaa8bfe92c460fa4d06a920b12ee9a |
| institution | Directory Open Access Journal |
| issn | 2117-4458 |
| language | English |
| last_indexed | 2024-04-10T05:09:32Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | BIO Web of Conferences |
| spelling | doaj.art-8bdaa8bfe92c460fa4d06a920b12ee9a2023-03-09T11:16:39ZengEDP SciencesBIO Web of Conferences2117-44582023-01-01560101210.1051/bioconf/20235601012bioconf_oiv2022_01012Effect of irrigation management on the relationship between stomatal conductance and stem water potential on cv. Cabernet SauvignonSebastian Vargas0Nicolas Osorio1Alvaro González2Samuel Ortega-Farías3Centro de Investigación e Innovación de Viña Concha y ToroCentro de Investigación e Innovación de Viña Concha y ToroCentro de Investigación e Innovación de Viña Concha y ToroCentro de Investigación y Transferencia en Riego y Agroclimatología (CITRA), Universidad de TalcaWater relations in vineyards have been largely studied; giving insides regarding the way grapevine interacts with its environment according to water availability, providing us terminologies like Isohydric and Anisohydric, which have been applied to categorize cultivars and rootstocks. Recently, the use of this terminology has been subjected to discussion regarding its use as a category to describe and separate grapevine cultivars instead of using it as a continuous, where grapevines can behave more iso or anysohidric depending on the environment where they are grown. In this study, using a deficit irrigation (RDI) trial in a commercial vineyard located in Maule Valley in Central Chile, the relationship between Midday Stem Water Potential (ψx), Stomatal Conductance (gs), Soil Water Content (WC), and Vapour Pressure Deficit (VPD) on cv. Cabernet Sauvignon was studied, a grape variety that has been classified as isohydric. The trial was carried out for 3 years from 2018 to 2020 in which four RDI treatments were employed to replenish different portions of evapotranspiration (ET) from pea-size until harvest. These irrigation treatments were conceived as 100% ET, 70% ET, 50-100% ET (50% ET before veraison and 100% ET afterwards) and 35-100% ET (35% ET before veraison and 100% ET afterwards). Findings in this study show how the relationship between ψx and gs is treatment dependent; in treatments where no water deficit was imposed a weaker relationship between the variables was observed, showing a large variation between gs at similar ψx, being gs more dependent on VPD compared to the treatments with a larger deficit on its irrigation. As the deficit irrigation increased, grapevines started to shift to a smaller variation on its gs over large variations on its ψx. This result shows that irrigation management and deficit irrigation strategies impact the way plants react to water availability and leads to different behavior on its gs/ψx relationship.https://www.bio-conferences.org/articles/bioconf/full_html/2023/01/bioconf_oiv2022_01012/bioconf_oiv2022_01012.html |
| spellingShingle | Sebastian Vargas Nicolas Osorio Alvaro González Samuel Ortega-Farías Effect of irrigation management on the relationship between stomatal conductance and stem water potential on cv. Cabernet Sauvignon BIO Web of Conferences |
| title | Effect of irrigation management on the relationship between stomatal conductance and stem water potential on cv. Cabernet Sauvignon |
| title_full | Effect of irrigation management on the relationship between stomatal conductance and stem water potential on cv. Cabernet Sauvignon |
| title_fullStr | Effect of irrigation management on the relationship between stomatal conductance and stem water potential on cv. Cabernet Sauvignon |
| title_full_unstemmed | Effect of irrigation management on the relationship between stomatal conductance and stem water potential on cv. Cabernet Sauvignon |
| title_short | Effect of irrigation management on the relationship between stomatal conductance and stem water potential on cv. Cabernet Sauvignon |
| title_sort | effect of irrigation management on the relationship between stomatal conductance and stem water potential on cv cabernet sauvignon |
| url | https://www.bio-conferences.org/articles/bioconf/full_html/2023/01/bioconf_oiv2022_01012/bioconf_oiv2022_01012.html |
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