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Title: Effect of Leaf Water Potential on Internal Humidity and CO2 Dissolution: Reverse Transpiration and Improved Water Use Efficiency under Negative Pressure

Abstract

The pull of water from the soil to the leaves causes water in the transpiration stream to be under negative pressure decreasing the water potential below zero. The osmotic concentration also contributes to the decrease in leaf water potential but with much lesser extent. Thus, the surface tension force is approximately balanced by a force induced by negative water potential resulting in concavely curved water-air interfaces in leaves. The lowered water potential causes a reduction in the equilibrium water vapor pressure in internal (sub-stomatal/intercellular) cavities in relation to that over water with the potential of zero, i.e., over the flat surface. The curved surface causes a reduction also in the equilibrium vapor pressure of dissolved CO2, thus enhancing its physical solubility to water. Although the water vapor reduction is acknowledged by plant physiologists its consequences for water vapor exchange at low water potential values have received very little attention. Consequences of the enhanced CO2 solubility to a leaf water-carbon budget have not been considered at all before this study. We use theoretical calculations and modeling to show how the reduction in the vapor pressures affects transpiration and carbon assimilation rates. Here, our results indicate that the reduction in vapor pressuresmore » of water and CO2 could enhance plant water use efficiency up to about 10% at a leaf water potential of -2 MPa, and much more when water potential decreases further. The low water potential allows for a direct stomatal water vapor uptake from the ambient air even at sub-100% relative humidity values. This alone could explain the observed rates of foliar water uptake by e.g., the coastal redwood in the fog belt region of coastal California provided the stomata are sufficiently open. Lastly, the omission of the reduction in the water vapor pressure causes a bias in the estimates of the stomatal conductance and leaf internal CO2 concentration based on leaf gas exchange measurements. Manufactures of leaf gas exchange measurement systems should incorporate leaf water potentials in measurement set-ups.« less

Authors:
 [1];  [2];  [3];  [3];  [4];  [4];  [4]
  1. Univ. of Helsinki (Finland). Dept. of Physics; Univ. of Helsinki (Finland). Dept. of Forest Sciences; Univ. of Helsinki (Finland). Viikki Plant Science Centre
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Univ. of Helsinki (Finland). Dept. of Physics
  4. Univ. of Helsinki (Finland). Dept. of Forest Sciences
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; Academy of Finland Centre of Excellence
OSTI Identifier:
1351237
Report Number(s):
LA-UR-17-22009
Journal ID: ISSN 1664-462X
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Frontiers in Plant Science
Additional Journal Information:
Journal Volume: 8; Journal ID: ISSN 1664-462X
Publisher:
Frontiers Research Foundation
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Biological Science; Earth Sciences; Kelvin effect; foliar water uptake; vapor pressure deficit; water potential; CO2 assimilation; carbon uptake; water uptake; water use efficiency; redwood

Citation Formats

Vesala, Timo, Sevanto, Sanna, Grönholm, Tiia, Salmon, Yann, Nikinmaa, Eero, Hari, Pertti, and Hölttä, Teemu. Effect of Leaf Water Potential on Internal Humidity and CO2 Dissolution: Reverse Transpiration and Improved Water Use Efficiency under Negative Pressure. United States: N. p., 2017. Web. doi:10.3389/fpls.2017.00054.
Vesala, Timo, Sevanto, Sanna, Grönholm, Tiia, Salmon, Yann, Nikinmaa, Eero, Hari, Pertti, & Hölttä, Teemu. Effect of Leaf Water Potential on Internal Humidity and CO2 Dissolution: Reverse Transpiration and Improved Water Use Efficiency under Negative Pressure. United States. https://doi.org/10.3389/fpls.2017.00054
Vesala, Timo, Sevanto, Sanna, Grönholm, Tiia, Salmon, Yann, Nikinmaa, Eero, Hari, Pertti, and Hölttä, Teemu. Mon . "Effect of Leaf Water Potential on Internal Humidity and CO2 Dissolution: Reverse Transpiration and Improved Water Use Efficiency under Negative Pressure". United States. https://doi.org/10.3389/fpls.2017.00054. https://www.osti.gov/servlets/purl/1351237.
@article{osti_1351237,
title = {Effect of Leaf Water Potential on Internal Humidity and CO2 Dissolution: Reverse Transpiration and Improved Water Use Efficiency under Negative Pressure},
author = {Vesala, Timo and Sevanto, Sanna and Grönholm, Tiia and Salmon, Yann and Nikinmaa, Eero and Hari, Pertti and Hölttä, Teemu},
abstractNote = {The pull of water from the soil to the leaves causes water in the transpiration stream to be under negative pressure decreasing the water potential below zero. The osmotic concentration also contributes to the decrease in leaf water potential but with much lesser extent. Thus, the surface tension force is approximately balanced by a force induced by negative water potential resulting in concavely curved water-air interfaces in leaves. The lowered water potential causes a reduction in the equilibrium water vapor pressure in internal (sub-stomatal/intercellular) cavities in relation to that over water with the potential of zero, i.e., over the flat surface. The curved surface causes a reduction also in the equilibrium vapor pressure of dissolved CO2, thus enhancing its physical solubility to water. Although the water vapor reduction is acknowledged by plant physiologists its consequences for water vapor exchange at low water potential values have received very little attention. Consequences of the enhanced CO2 solubility to a leaf water-carbon budget have not been considered at all before this study. We use theoretical calculations and modeling to show how the reduction in the vapor pressures affects transpiration and carbon assimilation rates. Here, our results indicate that the reduction in vapor pressures of water and CO2 could enhance plant water use efficiency up to about 10% at a leaf water potential of -2 MPa, and much more when water potential decreases further. The low water potential allows for a direct stomatal water vapor uptake from the ambient air even at sub-100% relative humidity values. This alone could explain the observed rates of foliar water uptake by e.g., the coastal redwood in the fog belt region of coastal California provided the stomata are sufficiently open. Lastly, the omission of the reduction in the water vapor pressure causes a bias in the estimates of the stomatal conductance and leaf internal CO2 concentration based on leaf gas exchange measurements. Manufactures of leaf gas exchange measurement systems should incorporate leaf water potentials in measurement set-ups.},
doi = {10.3389/fpls.2017.00054},
journal = {Frontiers in Plant Science},
number = ,
volume = 8,
place = {United States},
year = {Mon Feb 06 00:00:00 EST 2017},
month = {Mon Feb 06 00:00:00 EST 2017}
}

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Cited by: 53 works
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Works referenced in this record:

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Foliage surface ozone deposition: a role for surface moisture?
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Hydraulic constraints modify optimal photosynthetic profiles in giant sequoia trees
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Experimental cloud immersion and foliar water uptake in saplings of Abies fraseri and Picea rubens
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Foliar uptake of fog water and transport belowground alleviates drought effects in the cloud forest tree species, Drimys brasiliensis (Winteraceae)
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Some relationships between the biochemistry of photosynthesis and the gas exchange of leaves
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Water stress decreases the transfer conductance of Douglas-fir (Pseudotsuga menziesii) seedlings
journal, September 2004


Optimal Control of Gas Exchange during Drought: Theoretical Analysis
journal, May 1996


Foliar water uptake: a common water acquisition strategy for plants of the redwood forest
journal, July 2009


Hydraulic constraints modify optimal photosynthetic profiles in giant sequoia trees
journal, August 2016


Experimental cloud immersion and foliar water uptake in saplings of Abies fraseri and Picea rubens
journal, September 2013


Nighttime transpiration in a seasonally dry tropical montane cloud forest environment
journal, November 2014

  • Alvarado-Barrientos, M. Susana; Holwerda, Friso; Geissert, Daniel R.
  • Trees, Vol. 29, Issue 1
  • DOI: 10.1007/s00468-014-1111-1

The ascent of sap in plants
journal, January 1981


The Kelvin Relation: Stability, Fluctuation, and Factors Involved in Measurement
journal, May 1995

  • Reiss, Howard; Koper, Ger J. M.
  • The Journal of Physical Chemistry, Vol. 99, Issue 19
  • DOI: 10.1021/j100019a074

Direct experimental verification of the Kelvin equation for capillary condensation
journal, February 1979

  • Fisher, L. R.; Israelachvili, J. N.
  • Nature, Vol. 277, Issue 5697
  • DOI: 10.1038/277548a0

The limits to tree height
journal, April 2004

  • Koch, George W.; Sillett, Stephen C.; Jennings, Gregory M.
  • Nature, Vol. 428, Issue 6985
  • DOI: 10.1038/nature02417

Diurnal variations of photosynthesis and dew absorption by leaves in two evergreen shrubs growing in Mediterranean field conditions
journal, October 1999


Drought-inhibition of Photosynthesis in C3 Plants: Stomatal and Non-stomatal Limitations Revisited
journal, February 2002


Cuticular water permeability and its physiological significance
journal, January 1996


The Cohesion-Tension theory of sap ascent: current controversies
journal, January 1997


Water stress decreases the transfer conductance of Douglas-fir (Pseudotsuga menziesii) seedlings
journal, September 2004


Nighttime transpiration in woody plants from contrasting ecosystems
journal, April 2007


Foliar uptake, carbon fluxes and water status are affected by the timing of daily fog in saplings from a threatened cloud forest
journal, May 2014


Liesegang pattern development in carbonating traditional lime mortars
journal, September 2002

  • Rodriguez-Navarro, Carlos; Cazalla, Olga; Elert, Kerstin
  • Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 458, Issue 2025
  • DOI: 10.1098/rspa.2002.0975

Evaporation of Free PbS Nanoparticles: Evidence of the Kelvin Effect
journal, December 2002


Nighttime Stomatal Conductance and Transpiration in C 3 and C 4 Plants
journal, January 2007

  • Caird, Mairgareth A.; Richards, James H.; Donovan, Lisa A.
  • Plant Physiology, Vol. 143, Issue 1
  • DOI: 10.1104/pp.106.092940

Moisture Absorption by Plants from an Atmosphere of high Humidity
journal, July 1950

  • Breazeale, E. L.; McGeorge, W. T.; Breazeale, J. F.
  • Plant Physiology, Vol. 25, Issue 3
  • DOI: 10.1104/pp.25.3.413

The incidence and implications of clouds for cloud forest plant water relations
journal, December 2012

  • Goldsmith, Gregory R.; Matzke, Nicholas J.; Dawson, Todd E.
  • Ecology Letters, Vol. 16, Issue 3
  • DOI: 10.1111/ele.12039

The contribution of fog to the water relations of Sequoia sempervirens (D. Don): foliar uptake and prevention of dehydration
journal, August 2004


Photosynthetic responses of Larrea tridentata to seasonal temperature extremes under elevated CO2
journal, May 2004


The control of stomata by water balance: Tansley review
journal, August 2005


Foliar uptake of fog water and transport belowground alleviates drought effects in the cloud forest tree species, Drimys brasiliensis (Winteraceae)
journal, March 2013

  • Eller, Cleiton B.; Lima, Aline L.; Oliveira, Rafael S.
  • New Phytologist, Vol. 199, Issue 1
  • DOI: 10.1111/nph.12248

Dissolved atmospheric gas in xylem sap measured with membrane inlet mass spectrometry: Measurements of dissolved gas in xylem sap
journal, February 2016

  • Schenk, H. Jochen; Espino, Susana; Visser, Ate
  • Plant, Cell & Environment, Vol. 39, Issue 4
  • DOI: 10.1111/pce.12678

Vulnerability of Xylem to Cavitation and Embolism
journal, June 1989


Foliar Absorption of Intercepted Rainfall Improves Woody Plant Water Status most During Drought
journal, January 2008

  • Breshears, David D.; McDowell, Nathan G.; Goddard, Kelly L.
  • Ecology, Vol. 89, Issue 1
  • DOI: 10.1890/07-0437.1

Foliage surface ozone deposition: a role for surface moisture?
journal, January 2006


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Foliar water‐uptake strategies are related to leaf water status and gas exchange in plants from a ferruginous rupestrian field
journal, July 2019

  • Boanares, Daniela; Kozovits, Alessandra R.; Lemos‐Filho, José P.
  • American Journal of Botany, Vol. 106, Issue 7
  • DOI: 10.1002/ajb2.1322

Inferring foliar water uptake using stable isotopes of water
journal, July 2017


Unsaturation of vapour pressure inside leaves of two conifer species
journal, May 2018


The temperature optima for tree seedling photosynthesis and growth depend on water inputs
journal, February 2020

  • Kumarathunge, Dushan P.; Drake, John E.; Tjoelker, Mark G.
  • Global Change Biology, Vol. 26, Issue 4
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journal, July 2019

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Equivalence of foliar water uptake and stomatal conductance?
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Influence of Drought on Foliar Water Uptake Capacity of Temperate Tree Species
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