Changes in 15NO3- Availability and Transpiration Rate Are Associated With a Rapid Diurnal Adjustment of Anion Contents as Well as 15N and Water Fluxes Between the Roots and Shoots
Background and Aims: Understanding interactions between water and nitrate fluxes in response to nitrate availability and transpiration rate is crucial to select more efficient plants for the use of water and nitrate.Methods: Some of these interactions were investigated in intact Brassica napus plant...
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Frontiers Media S.A.
2018-12-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fpls.2018.01751/full |
| _version_ | 1811284208399679488 |
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| author | Charline Orieux Gilles Demarest Marie-Laure Decau Patrick Beauclair Marie-Paule Bataillé Erwan Le Deunff |
| author_facet | Charline Orieux Gilles Demarest Marie-Laure Decau Patrick Beauclair Marie-Paule Bataillé Erwan Le Deunff |
| author_sort | Charline Orieux |
| collection | DOAJ |
| description | Background and Aims: Understanding interactions between water and nitrate fluxes in response to nitrate availability and transpiration rate is crucial to select more efficient plants for the use of water and nitrate.Methods: Some of these interactions were investigated in intact Brassica napus plants by combining a non-destructive gravimetric device with 15NO3- labeling. The set-up allowed high-resolution measurement of the effects of a cross-combination of two concentrations of KNO3 or KCl (0.5 and 5 mM) with two different rates of transpiration controlled by the relative humidity during a day–night cycle.Key Results: Results show that (1) high external nitrate concentrations increased root water uptake significantly whatever the transpiration rate, (2) nitrate translocation depended both on the rate of nitrate uptake and loading into xylem (3) dilution-concentration effect of nitrate in the xylem was mainly modulated by both external nitrate availability and transpiration rate, (4) dynamic changes in 15N translocation in the xylem modified shoot growth and capacitance, and (5) variations in tissue concentrations of NO3- induced by the experimental conditions were balanced by changes in concentrations of chloride and sulfate ions. These effects were even more amplified under low transpiration condition and 0.5 mM external nitrate concentration.Conclusion: Taken together, these results highlight the fine and rapid adjustment of anion contents, nitrate and water flows to changes in transpiration rate and nitrate availability during a day–night cycle. The use of this non-invasive gravimetric device is therefore a powerful tool to assess candidates genes involved in nitrogen and water use efficiency. |
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| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-04-13T02:25:09Z |
| publishDate | 2018-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-eed7587f0b8e4bf48d05aafbeaaa71312022-12-22T03:06:48ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2018-12-01910.3389/fpls.2018.01751313699Changes in 15NO3- Availability and Transpiration Rate Are Associated With a Rapid Diurnal Adjustment of Anion Contents as Well as 15N and Water Fluxes Between the Roots and ShootsCharline Orieux0Gilles Demarest1Marie-Laure Decau2Patrick Beauclair3Marie-Paule Bataillé4Erwan Le Deunff5Ecophysiologie Végétale Agronomie et Nutritions N.C.S., UNICAEN, INRA, EVA, Normandie Université, Caen, FranceEcophysiologie Végétale Agronomie et Nutritions N.C.S., UNICAEN, INRA, EVA, Normandie Université, Caen, FranceINRA FERLUS-SOERE, INRA – Auvergne Rhône-Alpes Centre, Lusignan, FranceEcophysiologie Végétale Agronomie et Nutritions N.C.S., UNICAEN, INRA, EVA, Normandie Université, Caen, FranceCentre Michel de Boüard et LETG-Caen Geophen, UNICAEN, CNRS, CRAHAM, LETG, Normandie Université, Caen, FranceStructure Fédérative Interactions Cellules ORganismes Environnement, UNICAEN, ICORE, Normandie Université, Caen, FranceBackground and Aims: Understanding interactions between water and nitrate fluxes in response to nitrate availability and transpiration rate is crucial to select more efficient plants for the use of water and nitrate.Methods: Some of these interactions were investigated in intact Brassica napus plants by combining a non-destructive gravimetric device with 15NO3- labeling. The set-up allowed high-resolution measurement of the effects of a cross-combination of two concentrations of KNO3 or KCl (0.5 and 5 mM) with two different rates of transpiration controlled by the relative humidity during a day–night cycle.Key Results: Results show that (1) high external nitrate concentrations increased root water uptake significantly whatever the transpiration rate, (2) nitrate translocation depended both on the rate of nitrate uptake and loading into xylem (3) dilution-concentration effect of nitrate in the xylem was mainly modulated by both external nitrate availability and transpiration rate, (4) dynamic changes in 15N translocation in the xylem modified shoot growth and capacitance, and (5) variations in tissue concentrations of NO3- induced by the experimental conditions were balanced by changes in concentrations of chloride and sulfate ions. These effects were even more amplified under low transpiration condition and 0.5 mM external nitrate concentration.Conclusion: Taken together, these results highlight the fine and rapid adjustment of anion contents, nitrate and water flows to changes in transpiration rate and nitrate availability during a day–night cycle. The use of this non-invasive gravimetric device is therefore a powerful tool to assess candidates genes involved in nitrogen and water use efficiency.https://www.frontiersin.org/article/10.3389/fpls.2018.01751/fullnitrate uptakewater uptaketranspirationshoot capacitancechloridesulfate |
| spellingShingle | Charline Orieux Gilles Demarest Marie-Laure Decau Patrick Beauclair Marie-Paule Bataillé Erwan Le Deunff Changes in 15NO3- Availability and Transpiration Rate Are Associated With a Rapid Diurnal Adjustment of Anion Contents as Well as 15N and Water Fluxes Between the Roots and Shoots Frontiers in Plant Science nitrate uptake water uptake transpiration shoot capacitance chloride sulfate |
| title | Changes in 15NO3- Availability and Transpiration Rate Are Associated With a Rapid Diurnal Adjustment of Anion Contents as Well as 15N and Water Fluxes Between the Roots and Shoots |
| title_full | Changes in 15NO3- Availability and Transpiration Rate Are Associated With a Rapid Diurnal Adjustment of Anion Contents as Well as 15N and Water Fluxes Between the Roots and Shoots |
| title_fullStr | Changes in 15NO3- Availability and Transpiration Rate Are Associated With a Rapid Diurnal Adjustment of Anion Contents as Well as 15N and Water Fluxes Between the Roots and Shoots |
| title_full_unstemmed | Changes in 15NO3- Availability and Transpiration Rate Are Associated With a Rapid Diurnal Adjustment of Anion Contents as Well as 15N and Water Fluxes Between the Roots and Shoots |
| title_short | Changes in 15NO3- Availability and Transpiration Rate Are Associated With a Rapid Diurnal Adjustment of Anion Contents as Well as 15N and Water Fluxes Between the Roots and Shoots |
| title_sort | changes in 15no3 availability and transpiration rate are associated with a rapid diurnal adjustment of anion contents as well as 15n and water fluxes between the roots and shoots |
| topic | nitrate uptake water uptake transpiration shoot capacitance chloride sulfate |
| url | https://www.frontiersin.org/article/10.3389/fpls.2018.01751/full |
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