Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution
Soil drying increases endogenous ABA and ACC concentrations in planta, but how these compounds interact to regulate stomatal responses to soil drying and re-watering is still unclear. To determine the temporal dynamics and physiological significance of root, xylem and leaf ABA and ACC concentrations...
| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2020
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.11939/6475 https://www.sciencedirect.com/science/article/pii/S0098847220301210 |
| _version_ | 1855492091448131584 |
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| author | Pérez-Pérez, Juan G. Puertolas, Jaime Albacete, Alfonso Dodd, Ian C. |
| author_browse | Albacete, Alfonso Dodd, Ian C. Puertolas, Jaime Pérez-Pérez, Juan G. |
| author_facet | Pérez-Pérez, Juan G. Puertolas, Jaime Albacete, Alfonso Dodd, Ian C. |
| author_sort | Pérez-Pérez, Juan G. |
| collection | ReDivia |
| description | Soil drying increases endogenous ABA and ACC concentrations in planta, but how these compounds interact to regulate stomatal responses to soil drying and re-watering is still unclear. To determine the temporal dynamics and physiological significance of root, xylem and leaf ABA and ACC concentrations in response to deficit irrigation (DI) or partial rootzone drying (PRD-F) and re-watering, these variables were measured in plants exposed to similar whole pot soil water contents. Both DI and PRD-F plants received only a fraction of the irrigation supplied to well-watered (WW) plants, either to all (DI) or part (PRD-F) of the rootzone of plants grown in split-pots. Both DI and PRD-F induced partial stomatal closure, increased root ABA and ACC accumulation consistent with local soil water content, but did not affect xylem or leaf concentrations of these compounds compared to WW plants. Two hours after re-watering all (DI-RW) or part of the rootzone (PRD-A) to the same soil water content, stomatal conductance returned to WW values or further decreased respectively. Re-watering the whole rootzone had no effect on xylem and leaf ABA and ACC concentrations, while re-watering the dry side of the pot in PRD plants had no effect on xylem and leaf ABA concentrations but increased xylem and leaf ACC concentrations and leaf ethylene evolution. Leaf water potential was similar between all irrigation treatments, with stomatal conductance declining as xylem ABA concentrations and leaf ACC concentrations increased. Prior to re-watering PRD plants, accounting for the spatial differences in soil water uptake best explained variation in xylem ACC concentration suggesting root-to-shoot ACC signalling, but this model did not account for variation in xylem ACC concentration after re-watering the dry side of PRD plants. Thus local (foliar) and long-distance (root-to-shoot) variation in ACC status both seem important in regulating the temporal dynamics of foliar ethylene evolution in plants exposed to PRD. |
| format | Artículo |
| id | ReDivia6475 |
| institution | Instituto Valenciano de Investigaciones Agrarias (IVIA) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | ReDivia64752025-04-25T14:47:13Z Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution Pérez-Pérez, Juan G. Puertolas, Jaime Albacete, Alfonso Dodd, Ian C. ACC Partial rootzone drying Root-to-shoot signalling Soil moisture heterogeneity F60 Plant physiology and biochemistry F06 Irrigation Ethylene Soil drying increases endogenous ABA and ACC concentrations in planta, but how these compounds interact to regulate stomatal responses to soil drying and re-watering is still unclear. To determine the temporal dynamics and physiological significance of root, xylem and leaf ABA and ACC concentrations in response to deficit irrigation (DI) or partial rootzone drying (PRD-F) and re-watering, these variables were measured in plants exposed to similar whole pot soil water contents. Both DI and PRD-F plants received only a fraction of the irrigation supplied to well-watered (WW) plants, either to all (DI) or part (PRD-F) of the rootzone of plants grown in split-pots. Both DI and PRD-F induced partial stomatal closure, increased root ABA and ACC accumulation consistent with local soil water content, but did not affect xylem or leaf concentrations of these compounds compared to WW plants. Two hours after re-watering all (DI-RW) or part of the rootzone (PRD-A) to the same soil water content, stomatal conductance returned to WW values or further decreased respectively. Re-watering the whole rootzone had no effect on xylem and leaf ABA and ACC concentrations, while re-watering the dry side of the pot in PRD plants had no effect on xylem and leaf ABA concentrations but increased xylem and leaf ACC concentrations and leaf ethylene evolution. Leaf water potential was similar between all irrigation treatments, with stomatal conductance declining as xylem ABA concentrations and leaf ACC concentrations increased. Prior to re-watering PRD plants, accounting for the spatial differences in soil water uptake best explained variation in xylem ACC concentration suggesting root-to-shoot ACC signalling, but this model did not account for variation in xylem ACC concentration after re-watering the dry side of PRD plants. Thus local (foliar) and long-distance (root-to-shoot) variation in ACC status both seem important in regulating the temporal dynamics of foliar ethylene evolution in plants exposed to PRD. 2020-05-27T16:46:50Z 2020-05-27T16:46:50Z 2020 article acceptedVersion Pérez-Pérez J.G., Puertolas J., Albacete A., Dodd I.C. (2020) Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution. Environmental and Experimental Botany, 176, 104095. http://hdl.handle.net/20.500.11939/6475 10.1016/j.envexpbot.2020.104095 https://www.sciencedirect.com/science/article/pii/S0098847220301210 en info:eu-repo/grantAgreement/MINECO/Programa Estatal de Promoción del Talento y su Empleabilidad/RYC-2015-17726 Ministerio de Economía y Competitividad, Ayuda Ramón y Cajal, RYC-2015-17726 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Elsevier electronico |
| spellingShingle | ACC Partial rootzone drying Root-to-shoot signalling Soil moisture heterogeneity F60 Plant physiology and biochemistry F06 Irrigation Ethylene Pérez-Pérez, Juan G. Puertolas, Jaime Albacete, Alfonso Dodd, Ian C. Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution |
| title | Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution |
| title_full | Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution |
| title_fullStr | Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution |
| title_full_unstemmed | Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution |
| title_short | Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution |
| title_sort | alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution |
| topic | ACC Partial rootzone drying Root-to-shoot signalling Soil moisture heterogeneity F60 Plant physiology and biochemistry F06 Irrigation Ethylene |
| url | http://hdl.handle.net/20.500.11939/6475 https://www.sciencedirect.com/science/article/pii/S0098847220301210 |
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