Propagating ice front induces gas bursts and ultrasonic acoustic emissions from freezing xylem

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dc.contributor.author Lintunen, Anna
dc.contributor.author Losso, Adriano
dc.contributor.author Aalto, Juho
dc.contributor.author Chan, Tommy
dc.contributor.author Hölttä, Teemu
dc.contributor.author Mayr, Stefan
dc.date.accessioned 2020-12-18T23:32:23Z
dc.date.available 2021-12-18T03:45:21Z
dc.date.issued 2020-02
dc.identifier.citation Lintunen , A , Losso , A , Aalto , J , Chan , T , Hölttä , T & Mayr , S 2020 , ' Propagating ice front induces gas bursts and ultrasonic acoustic emissions from freezing xylem ' , Tree Physiology , vol. 40 , no. 2 , pp. 170-182 . https://doi.org/10.1093/treephys/tpz123
dc.identifier.other PURE: 130207518
dc.identifier.other PURE UUID: d073069d-6484-4f20-aac8-4c040a7cd7ce
dc.identifier.other WOS: 000518553500004
dc.identifier.other ORCID: /0000-0002-1077-0784/work/71510808
dc.identifier.other ORCID: /0000-0002-5700-7209/work/86938331
dc.identifier.uri http://hdl.handle.net/10138/323510
dc.description.abstract Ice formation and propagation in the xylem of plants is a complex process. During freezing of xylem sap, gases dissolved in liquid sap are forced out of the ice lattice due to their low solubility in ice, and supersaturation of xylem sap as well as low water potential (Psi) are induced at the ice-liquid interface. Supersaturation of gases near the ice front may lead to bubble formation and potentially to cavitation and/or to burst of gases driven out from the branch. In this study, we investigated the origin and dynamics of freezing-related gas bursts and ultrasonic acoustic emissions (AEs), which are suggested to indicate cavitation. Picea abies (L.) H. Karst. and Salix caprea L. branch segments were exposed to frost cycles in a temperature test chamber, and CO2 efflux (indicating gas bursts) and AEs were recorded. On freezing, two-thirds of the observed gas bursts originated from the xylem and only one-third from the bark. Simultaneously with gas bursts, AEs were detected. Branch Psi affected both gas bursts and AEs, with high gas burst in saturated and dry samples but relevant AEs only in the latter. Repeated frost cycles led to decreasing gas burst volumes and AE activity. Experiments revealed that the expanding ice front in freezing xylem was responsible for observed gas bursts and AEs, and that branch Psi influenced both processes. Results also indicated that gas bursts and cavitation are independently induced by ice formation, though both may be relevant for bubble dynamics during freezing. en
dc.format.extent 13
dc.language.iso eng
dc.relation.ispartof Tree Physiology
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 11831 Plant biology
dc.subject 4112 Forestry
dc.subject 1184 Genetics, developmental biology, physiology
dc.subject acoustic emissions
dc.subject bark permeability
dc.subject effective diffusion coefficient of CO2
dc.subject freeze-thaw cycles
dc.subject respiration
dc.subject winter embolism
dc.subject JUGLANS-REGIA
dc.subject CONIFER XYLEM
dc.subject WATER-STRESS
dc.subject CAVITATION
dc.subject EMBOLISM
dc.subject WOOD
dc.subject CO2
dc.subject GROWTH
dc.subject TREES
dc.subject VULNERABILITY
dc.title Propagating ice front induces gas bursts and ultrasonic acoustic emissions from freezing xylem en
dc.type Article
dc.contributor.organization INAR Physics
dc.contributor.organization Ecosystem processes (INAR Forest Sciences)
dc.contributor.organization Forest Ecology and Management
dc.contributor.organization Institute for Atmospheric and Earth System Research (INAR)
dc.contributor.organization Viikki Plant Science Centre (ViPS)
dc.contributor.organization Department of Forest Sciences
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1093/treephys/tpz123
dc.relation.issn 0829-318X
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion
dc.identifier.url https://academic.oup.com/treephys/advance-article-abstract/doi/10.1093/treephys/tpz123/5681429?redirectedFrom=PDF

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