The Pressure Is On – Epiphyte Water-Relations Altered Under Elevated CO2
Vascular epiphytes are a major biomass component of forests across the globe and they contribute to 9% of global vascular plant diversity. To improve our understanding of the whole-plant response of epiphytes to future climate change, we investigated for the first time both individual and combined e...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2018-11-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fpls.2018.01758/full |
| _version_ | 1818508015100231680 |
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| author | Sven Batke Sven Batke Aidan Holohan Roisin Hayden Wieland Fricke Amanda Sara Porter Amanda Sara Porter Christiana Marie Evans-Fitz.Gerald |
| author_facet | Sven Batke Sven Batke Aidan Holohan Roisin Hayden Wieland Fricke Amanda Sara Porter Amanda Sara Porter Christiana Marie Evans-Fitz.Gerald |
| author_sort | Sven Batke |
| collection | DOAJ |
| description | Vascular epiphytes are a major biomass component of forests across the globe and they contribute to 9% of global vascular plant diversity. To improve our understanding of the whole-plant response of epiphytes to future climate change, we investigated for the first time both individual and combined effects of elevated CO2 (560 ppm) and light on the physiology and growth of two epiphyte species [Tillandsia brachycaulos (CAM) and Phlebodium aureum (C3)] grown for 272 days under controlled conditions. We found that under elevated CO2 the difference in water loss between the light (650 μmol m-2s-1) and shade (130 μmol m-2s-1) treatment was strongly reduced. Stomatal conductance (gs) decreased under elevated CO2, resulting in an approximate 40–45% reduction in water loss over a 24 h day/night period under high light and high CO2 conditions. Under lower light conditions water loss was reduced by approximately 20% for the CAM bromeliad under elevated CO2 and increased by approximately 126% for the C3 fern. Diurnal changes in leaf turgor and water loss rates correlated strong positively under ambient CO2 (400 ppm) and high light conditions. Future predicted increases in atmospheric CO2 are likely to alter plant water-relations in epiphytes, thus reducing the canopy cooling potential of epiphytes to future increases in temperature. |
| first_indexed | 2024-12-10T22:26:04Z |
| format | Article |
| id | doaj.art-1f6f6550ec8141a8b86831f1635410c8 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-10T22:26:04Z |
| publishDate | 2018-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-1f6f6550ec8141a8b86831f1635410c82022-12-22T01:31:11ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2018-11-01910.3389/fpls.2018.01758419511The Pressure Is On – Epiphyte Water-Relations Altered Under Elevated CO2Sven Batke0Sven Batke1Aidan Holohan2Roisin Hayden3Wieland Fricke4Amanda Sara Porter5Amanda Sara Porter6Christiana Marie Evans-Fitz.Gerald7Department of Biology, Edge Hill University, Ormskirk, United KingdomSchool of Biology and Environmental Science, Earth Institute, University College Dublin, Dublin, IrelandSchool of Biology and Environmental Science, Earth Institute, University College Dublin, Dublin, IrelandSchool of Biology and Environmental Science, Earth Institute, University College Dublin, Dublin, IrelandSchool of Biology and Environmental Science, Earth Institute, University College Dublin, Dublin, IrelandSchool of Biology and Environmental Science, Earth Institute, University College Dublin, Dublin, IrelandBotany Department, Trinity College Dublin, Dublin, IrelandSchool of Biology and Environmental Science, Earth Institute, University College Dublin, Dublin, IrelandVascular epiphytes are a major biomass component of forests across the globe and they contribute to 9% of global vascular plant diversity. To improve our understanding of the whole-plant response of epiphytes to future climate change, we investigated for the first time both individual and combined effects of elevated CO2 (560 ppm) and light on the physiology and growth of two epiphyte species [Tillandsia brachycaulos (CAM) and Phlebodium aureum (C3)] grown for 272 days under controlled conditions. We found that under elevated CO2 the difference in water loss between the light (650 μmol m-2s-1) and shade (130 μmol m-2s-1) treatment was strongly reduced. Stomatal conductance (gs) decreased under elevated CO2, resulting in an approximate 40–45% reduction in water loss over a 24 h day/night period under high light and high CO2 conditions. Under lower light conditions water loss was reduced by approximately 20% for the CAM bromeliad under elevated CO2 and increased by approximately 126% for the C3 fern. Diurnal changes in leaf turgor and water loss rates correlated strong positively under ambient CO2 (400 ppm) and high light conditions. Future predicted increases in atmospheric CO2 are likely to alter plant water-relations in epiphytes, thus reducing the canopy cooling potential of epiphytes to future increases in temperature.https://www.frontiersin.org/article/10.3389/fpls.2018.01758/fullclimate changeecophysiologyelevated CO2light conditionsstomatal conductanceturgor |
| spellingShingle | Sven Batke Sven Batke Aidan Holohan Roisin Hayden Wieland Fricke Amanda Sara Porter Amanda Sara Porter Christiana Marie Evans-Fitz.Gerald The Pressure Is On – Epiphyte Water-Relations Altered Under Elevated CO2 Frontiers in Plant Science climate change ecophysiology elevated CO2 light conditions stomatal conductance turgor |
| title | The Pressure Is On – Epiphyte Water-Relations Altered Under Elevated CO2 |
| title_full | The Pressure Is On – Epiphyte Water-Relations Altered Under Elevated CO2 |
| title_fullStr | The Pressure Is On – Epiphyte Water-Relations Altered Under Elevated CO2 |
| title_full_unstemmed | The Pressure Is On – Epiphyte Water-Relations Altered Under Elevated CO2 |
| title_short | The Pressure Is On – Epiphyte Water-Relations Altered Under Elevated CO2 |
| title_sort | pressure is on epiphyte water relations altered under elevated co2 |
| topic | climate change ecophysiology elevated CO2 light conditions stomatal conductance turgor |
| url | https://www.frontiersin.org/article/10.3389/fpls.2018.01758/full |
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