Show simple item record

dc.contributor.author
Guérin, Marceau
dc.contributor.author
von Arx, Georg
dc.contributor.author
Martin-Benito, Dario
dc.contributor.author
Andreu-Hayles, Laia
dc.contributor.author
Griffin, Kevin L.
dc.contributor.author
McDowell, Nate G.
dc.contributor.author
Pockman, William
dc.contributor.author
Gentine, Pierre
dc.date.accessioned
2024-05-29T13:27:14Z
dc.date.available
2020-05-15T08:03:59Z
dc.date.available
2020-05-15T10:34:35Z
dc.date.available
2024-05-29T13:27:14Z
dc.date.issued
2020-05
dc.identifier.issn
0829-318X
dc.identifier.issn
1758-4469
dc.identifier.other
10.1093/treephys/tpz144
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/415014
dc.identifier.doi
10.3929/ethz-b-000415014
dc.description.abstract
Increasing dryness challenges trees’ ability to maintain water transport to the leaves. Most plant hydraulics models use a static xylem response to water stress. Yet, in reality, lower soil moisture and warmer temperatures during growing seasons feed back onto xylem development. In turn, adjustments to water stress in the newly built xylem influence future physiological responses to droughts. In this study, we investigate the annual variation of anatomical traits in branch xylem in response to different soil and atmospheric moisture conditions and tree stress levels, as indicated by seasonal predawn leaf water potential (ΨL,pd). We used a 6-year field experiment in southwestern USA with three soil water treatments applied to Pinus edulis Engelm trees—ambient, drought (45% rain reduction) and irrigation (15–35% annual water addition). All trees were also subject to a natural 1-year acute drought (soil and atmospheric) that occurred during the experiment. The irrigated trees showed only moderate changes in anatomy-derived hydraulic traits compared with the ambient trees, suggesting a generally stable, well-balanced xylem structure under unstressed conditions. The artificial prolonged soil drought increased hydraulic efficiency but lowered xylem construction costs and decreased tracheid implosion safety ((t/b)2), suggesting that annual adjustments of xylem structure follow a safety–efficiency trade-off. The acute drought plunged hydraulic efficiency across all treatments. The combination of acute and prolonged drought resulted in vulnerable and inefficient new xylem, disrupting the stability of the anatomical trade-off observed in the rest of the years. The xylem hydraulic traits showed no consistent direct link to ΨL,pd. In the future, changes in seasonality of soil and atmospheric moisture are likely to have a critical impact on the ability of P. edulis to acclimate its xylem to warmer climate. Furthermore, the increasing frequency of acute droughts might reduce hydraulic resilience of P. edulis by repeatedly creating vulnerable and less efficient anatomical structure.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Oxford University Press
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
Carbon costs
en_US
dc.subject
Hydraulic efficiency
en_US
dc.subject
Hydraulic safety
en_US
dc.subject
Tracheid
en_US
dc.subject
Trade-off
en_US
dc.subject
Water transport
en_US
dc.subject
Wood anatomy
en_US
dc.title
Distinct xylem responses to acute vs prolonged drought in pine trees
en_US
dc.type
Journal Article
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2020-01-24
ethz.journal.title
Tree Physiology
ethz.journal.volume
40
en_US
ethz.journal.issue
5
en_US
ethz.pages.start
605
en_US
ethz.pages.end
620
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.notes
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
en_US
ethz.grant
Influence of climate variability on the dynamics and structure of old-growth temperate rainforests
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.grant.agreementno
329935
ethz.grant.fundername
EC
ethz.grant.funderDoi
10.13039/501100000780
ethz.grant.program
FP7
ethz.date.deposited
2020-05-15T08:04:25Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-05-15T10:34:56Z
ethz.rosetta.lastUpdated
2021-02-15T11:01:57Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Distinct%20xylem%20responses%20to%20acute%20vs%20prolonged%20drought%20in%20pine%20trees&rft.jtitle=Tree%20Physiology&rft.date=2020-05&rft.volume=40&rft.issue=5&rft.spage=605&rft.epage=620&rft.issn=0829-318X&1758-4469&rft.au=Gu%C3%A9rin,%20Marceau&von%20Arx,%20Georg&Martin-Benito,%20Dario&Andreu-Hayles,%20Laia&Griffin,%20Kevin%20L.&rft.genre=article&rft_id=info:doi/10.1093/treephys/tpz144&
 Search print copy at ETH Library

Files in this item

Thumbnail

Publication type

Show simple item record