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Title: Xylem embolism refilling and resilience against drought-induced mortality in woody plants: processes and trade-offs

Abstract

Understanding which species are able to recover from drought, under what conditions, and the mechanistic processes involved, will facilitate predictions of plant mortality in response to global change. In response to drought, some species die because of embolism-induced hydraulic failure, whilst others are able to avoid mortality and recover, following rehydration. Several tree species have evolved strategies to avoid embolism, whereas others tolerate high embolism rates but can recover their hydraulic functioning upon drought relief. Here, we focus on structures and processes that might allow some plants to recover from drought stress via embolism reversal. We provide insights into how embolism repair may have evolved, anatomical and physiological features that facilitate this process, and describe possible trade-offs and related costs. Recent controversies on methods used for estimating embolism formation/repair are also discussed, providing some methodological suggestions. Although controversial, embolism repair processes are apparently based on the activity of phloem and ray/axial parenchyma. The mechanism is energetically demanding, and the costs to plants include metabolism and transport of soluble sugars, water and inorganic ions. We propose that embolism repair should be considered as a possible component of a ‘hydraulic efficiency-safety’ spectrum. We also advance a framework for vegetation models, describing howmore » vulnerability curves may change in hydrodynamic model formulations for plants that recover from embolism.« less

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10]
  1. Weizmann Inst. of Science, Rehovot (Israel)
  2. Macquarie Univ., NSW (Australia)
  3. Univ. of Utah, Salt Lake City, UT (United States)
  4. Univ. of Innsbruck, Innsbruck (Austria)
  5. Univ. of New South Wales, Sydney, NSW (Australia)
  6. Univ. of New Mexico, Albuquerque, NM (United States)
  7. Karlsruhe Inst. of Technology (KIT), Inst. of Meteorology and Climate Research-Atmospheric Environmental Research, Garmisch-Partenkirchen (Germany)
  8. Harvard Univ., Cambridge, MA (United States)
  9. Swiss Federal Inst. for Forest, Snow and Landscape Research WSL, Birmensdorf (Switzerland)
  10. Univ. di Trieste, Trieste (Italy)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1532338
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Ecological Research
Additional Journal Information:
Journal Volume: 33; Journal Issue: 5; Journal ID: ISSN 0912-3814
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Hydraulic conductivity; Plant hydraulics; Plant water relations; Recovery; Repair

Citation Formats

Klein, Tamir, Zeppel, Melanie J. B., Anderegg, William R. L., Bloemen, Jasper, De Kauwe, Martin G., Hudson, Patrick, Ruehr, Nadine K., Powell, Thomas L., von Arx, Georg, and Nardini, Andrea. Xylem embolism refilling and resilience against drought-induced mortality in woody plants: processes and trade-offs. United States: N. p., 2018. Web. doi:10.1007/s11284-018-1588-y.
Klein, Tamir, Zeppel, Melanie J. B., Anderegg, William R. L., Bloemen, Jasper, De Kauwe, Martin G., Hudson, Patrick, Ruehr, Nadine K., Powell, Thomas L., von Arx, Georg, & Nardini, Andrea. Xylem embolism refilling and resilience against drought-induced mortality in woody plants: processes and trade-offs. United States. doi:10.1007/s11284-018-1588-y.
Klein, Tamir, Zeppel, Melanie J. B., Anderegg, William R. L., Bloemen, Jasper, De Kauwe, Martin G., Hudson, Patrick, Ruehr, Nadine K., Powell, Thomas L., von Arx, Georg, and Nardini, Andrea. Sat . "Xylem embolism refilling and resilience against drought-induced mortality in woody plants: processes and trade-offs". United States. doi:10.1007/s11284-018-1588-y. https://www.osti.gov/servlets/purl/1532338.
@article{osti_1532338,
title = {Xylem embolism refilling and resilience against drought-induced mortality in woody plants: processes and trade-offs},
author = {Klein, Tamir and Zeppel, Melanie J. B. and Anderegg, William R. L. and Bloemen, Jasper and De Kauwe, Martin G. and Hudson, Patrick and Ruehr, Nadine K. and Powell, Thomas L. and von Arx, Georg and Nardini, Andrea},
abstractNote = {Understanding which species are able to recover from drought, under what conditions, and the mechanistic processes involved, will facilitate predictions of plant mortality in response to global change. In response to drought, some species die because of embolism-induced hydraulic failure, whilst others are able to avoid mortality and recover, following rehydration. Several tree species have evolved strategies to avoid embolism, whereas others tolerate high embolism rates but can recover their hydraulic functioning upon drought relief. Here, we focus on structures and processes that might allow some plants to recover from drought stress via embolism reversal. We provide insights into how embolism repair may have evolved, anatomical and physiological features that facilitate this process, and describe possible trade-offs and related costs. Recent controversies on methods used for estimating embolism formation/repair are also discussed, providing some methodological suggestions. Although controversial, embolism repair processes are apparently based on the activity of phloem and ray/axial parenchyma. The mechanism is energetically demanding, and the costs to plants include metabolism and transport of soluble sugars, water and inorganic ions. We propose that embolism repair should be considered as a possible component of a ‘hydraulic efficiency-safety’ spectrum. We also advance a framework for vegetation models, describing how vulnerability curves may change in hydrodynamic model formulations for plants that recover from embolism.},
doi = {10.1007/s11284-018-1588-y},
journal = {Ecological Research},
number = 5,
volume = 33,
place = {United States},
year = {2018},
month = {3}
}

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