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Title: Embolism recovery strategies and nocturnal water loss across species influenced by biogeographic origin

Abstract

Drought-induced tree mortality is expected to increase in future climates with the potential for significant consequences to global carbon, water, and energy cycles. Xylem embolism can accumulate to lethal levels during drought, but species that can refill embolized xylem and recover hydraulic function may be able to avoid mortality. Yet the potential controls of embolism recovery, including cross-biome patterns and plant traits such as nonstructural carbohydrates (NSCs), hydraulic traits, and nocturnal stomatal conductance, are unknown. We exposed eight plant species, originating from mesic (tropical and temperate) and semi-arid environments, to drought under ambient and elevated CO2 levels, and assessed recovery from embolism following rewatering. We found a positive association between xylem recovery and NSCs, and, surprisingly, a positive relationship between xylem recovery and nocturnal stomatal conductance. Arid-zone species exhibited greater embolism recovery than mesic zone species. Our results indicate that nighttime stomatal conductance often assumed to be a wasteful use of water, may in fact be a key part of plant drought responses, and contribute to drought survival. Findings suggested distinct biome-specific responses that partially depended on species climate-of-origin precipitation or aridity index, which allowed some species to recover from xylem embolism. These findings provide improved understanding required to predictmore » the response of diverse plant communities to drought. Our results provide a framework for predicting future vegetation shifts in response to climate change.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4];  [5];  [5]; ORCiD logo [5];  [6];  [7]
  1. Department of Biological Sciences Macquarie University North Ryde New South Wales Australia
  2. School of Biological Sciences University of Utah Salt Lake City Utah
  3. Department of Plant Biology, Ecology, and Evolution Oklahoma State University Stillwater Oklahoma
  4. Department of Biology University of New Mexico Albuquerque New Mexico
  5. School of Life Sciences University of Technology Sydney Sydney New South Wales Australia
  6. Hawkesbury Institute of the Environment Western Sydney University Richmond New South Wales Australia
  7. Department of Ecology and Evolutionary Biology Princeton University Princeton New Jersey
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
OSTI Identifier:
1508659
Alternate Identifier(s):
OSTI ID: 1508661; OSTI ID: 1623544
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Published Article
Journal Name:
Ecology and Evolution
Additional Journal Information:
Journal Name: Ecology and Evolution Journal Volume: 9 Journal Issue: 9; Journal ID: ISSN 2045-7758
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
United Kingdom
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 54 ENVIRONMENTAL SCIENCES; Environmental Sciences & Ecology; Evolutionary Biology; carbohydrate starvation; drought‐induced mortality; embolism recovery; embolism refilling; hydraulic failure; nocturnal stomatal conductance; nonstructural carbohydrates; xylem embolism

Citation Formats

Zeppel, Melanie J. B., Anderegg, William R. L., Adams, Henry D., Hudson, Patrick, Cook, Alicia, Rumman, Rizwana, Eamus, Derek, Tissue, David T., and Pacala, Stephen W. Embolism recovery strategies and nocturnal water loss across species influenced by biogeographic origin. United Kingdom: N. p., 2019. Web. doi:10.1002/ece3.5126.
Zeppel, Melanie J. B., Anderegg, William R. L., Adams, Henry D., Hudson, Patrick, Cook, Alicia, Rumman, Rizwana, Eamus, Derek, Tissue, David T., & Pacala, Stephen W. Embolism recovery strategies and nocturnal water loss across species influenced by biogeographic origin. United Kingdom. doi:10.1002/ece3.5126.
Zeppel, Melanie J. B., Anderegg, William R. L., Adams, Henry D., Hudson, Patrick, Cook, Alicia, Rumman, Rizwana, Eamus, Derek, Tissue, David T., and Pacala, Stephen W. Sat . "Embolism recovery strategies and nocturnal water loss across species influenced by biogeographic origin". United Kingdom. doi:10.1002/ece3.5126.
@article{osti_1508659,
title = {Embolism recovery strategies and nocturnal water loss across species influenced by biogeographic origin},
author = {Zeppel, Melanie J. B. and Anderegg, William R. L. and Adams, Henry D. and Hudson, Patrick and Cook, Alicia and Rumman, Rizwana and Eamus, Derek and Tissue, David T. and Pacala, Stephen W.},
abstractNote = {Drought-induced tree mortality is expected to increase in future climates with the potential for significant consequences to global carbon, water, and energy cycles. Xylem embolism can accumulate to lethal levels during drought, but species that can refill embolized xylem and recover hydraulic function may be able to avoid mortality. Yet the potential controls of embolism recovery, including cross-biome patterns and plant traits such as nonstructural carbohydrates (NSCs), hydraulic traits, and nocturnal stomatal conductance, are unknown. We exposed eight plant species, originating from mesic (tropical and temperate) and semi-arid environments, to drought under ambient and elevated CO2 levels, and assessed recovery from embolism following rewatering. We found a positive association between xylem recovery and NSCs, and, surprisingly, a positive relationship between xylem recovery and nocturnal stomatal conductance. Arid-zone species exhibited greater embolism recovery than mesic zone species. Our results indicate that nighttime stomatal conductance often assumed to be a wasteful use of water, may in fact be a key part of plant drought responses, and contribute to drought survival. Findings suggested distinct biome-specific responses that partially depended on species climate-of-origin precipitation or aridity index, which allowed some species to recover from xylem embolism. These findings provide improved understanding required to predict the response of diverse plant communities to drought. Our results provide a framework for predicting future vegetation shifts in response to climate change.},
doi = {10.1002/ece3.5126},
journal = {Ecology and Evolution},
number = 9,
volume = 9,
place = {United Kingdom},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
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DOI: 10.1002/ece3.5126

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Cited by: 4 works
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