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The effect of plant water storage on water fluxes within the coupled soil-plant system.

Publication ,  Journal Article
Huang, C-W; Domec, J-C; Ward, EJ; Duman, T; Manoli, G; Parolari, AJ; Katul, GG
Published in: The New phytologist
February 2017

In addition to buffering plants from water stress during severe droughts, plant water storage (PWS) alters many features of the spatio-temporal dynamics of water movement in the soil-plant system. How PWS impacts water dynamics and drought resilience is explored using a multi-layer porous media model. The model numerically resolves soil-plant hydrodynamics by coupling them to leaf-level gas exchange and soil-root interfacial layers. Novel features of the model are the considerations of a coordinated relationship between stomatal aperture variation and whole-system hydraulics and of the effects of PWS and nocturnal transpiration (Fe,night) on hydraulic redistribution (HR) in the soil. The model results suggest that daytime PWS usage and Fe,night generate a residual water potential gradient (Δψp,night) along the plant vascular system overnight. This Δψp,night represents a non-negligible competing sink strength that diminishes the significance of HR. Considering the co-occurrence of PWS usage and HR during a single extended dry-down, a wide range of plant attributes and environmental/soil conditions selected to enhance or suppress plant drought resilience is discussed. When compared with HR, model calculations suggest that increased root water influx into plant conducting-tissues overnight maintains a more favorable water status at the leaf, thereby delaying the onset of drought stress.

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Published In

The New phytologist

DOI

EISSN

1469-8137

ISSN

0028-646X

Publication Date

February 2017

Volume

213

Issue

3

Start / End Page

1093 / 1106

Related Subject Headings

  • Xylem
  • Water
  • Soil
  • Plant Transpiration
  • Plant Stomata
  • Plant Roots
  • Plant Biology & Botany
  • Models, Biological
  • Carbon
  • 4102 Ecological applications
 

Citation

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Huang, C.-W., Domec, J.-C., Ward, E. J., Duman, T., Manoli, G., Parolari, A. J., & Katul, G. G. (2017). The effect of plant water storage on water fluxes within the coupled soil-plant system. The New Phytologist, 213(3), 1093–1106. https://doi.org/10.1111/nph.14273
Huang, Cheng-Wei, Jean-Christophe Domec, Eric J. Ward, Tomer Duman, Gabriele Manoli, Anthony J. Parolari, and Gabriel G. Katul. “The effect of plant water storage on water fluxes within the coupled soil-plant system.The New Phytologist 213, no. 3 (February 2017): 1093–1106. https://doi.org/10.1111/nph.14273.
Huang C-W, Domec J-C, Ward EJ, Duman T, Manoli G, Parolari AJ, et al. The effect of plant water storage on water fluxes within the coupled soil-plant system. The New phytologist. 2017 Feb;213(3):1093–106.
Huang, Cheng-Wei, et al. “The effect of plant water storage on water fluxes within the coupled soil-plant system.The New Phytologist, vol. 213, no. 3, Feb. 2017, pp. 1093–106. Epmc, doi:10.1111/nph.14273.
Huang C-W, Domec J-C, Ward EJ, Duman T, Manoli G, Parolari AJ, Katul GG. The effect of plant water storage on water fluxes within the coupled soil-plant system. The New phytologist. 2017 Feb;213(3):1093–1106.
Journal cover image

Published In

The New phytologist

DOI

EISSN

1469-8137

ISSN

0028-646X

Publication Date

February 2017

Volume

213

Issue

3

Start / End Page

1093 / 1106

Related Subject Headings

  • Xylem
  • Water
  • Soil
  • Plant Transpiration
  • Plant Stomata
  • Plant Roots
  • Plant Biology & Botany
  • Models, Biological
  • Carbon
  • 4102 Ecological applications