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Relationships between xylem embolism and tree functioning during drought, recovery, and recurring drought in Aleppo pine

Wagner, Yael; Volkov, Mila; Nadal-Sala, Daniel 1; Ruehr, Nadine Katrin ORCID iD icon 1; Hochberg, Uri; Klein, Tamir
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU), Karlsruher Institut für Technologie (KIT)

Abstract:

Recent findings suggest that trees can survive high levels of drought-induced xylem embolism. In many cases, the embolism is irreversible and, therefore, can potentially affect post-drought recovery and tree function under recurring droughts. We examined the development of embolism in potted Aleppo pines, a common species in hot, dry Mediterranean habitats. We asked (1) how post-drought recovery is affected by different levels of embolism and (2) what consequences this drought-induced damage has under a recurring drought scenario. Young trees were dehydrated to target water potential (Ψx) values of −3.5, −5.2 and −9.5 MPa (which corresponded to ~6%, ~41% and ~76% embolism), and recovery of the surviving trees was measured over an 8-months period (i.e., embolism, leaf gas-exchange, Ψx). An additional group of trees was exposed to Ψx of −6.0 MPa, either with or without preceding drought (Ψx of −5.2 MPa) to test the effect of hydraulic damage during repeated drought. Trees that reached −9.5 MPa died, but none from the other groups. Embolism levels in dying trees were on average 76% of conductive xylem and no tree was dying below 62% embolism. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000162192
Veröffentlicht am 22.09.2023
Originalveröffentlichung
DOI: 10.1111/ppl.13995
Scopus
Zitationen: 2
Web of Science
Zitationen: 2
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Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 0031-9317, 1399-3054
KITopen-ID: 1000162192
HGF-Programm 12.11.24 (POF IV, LK 01) Adaptation of natural landscapes to climate change
Erschienen in Physiologia Plantarum
Verlag John Wiley and Sons
Band 175
Heft 5
Seiten Art.Nr.: e13995
Vorab online veröffentlicht am 31.08.2023
Nachgewiesen in Web of Science
Scopus
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