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Thermal limits of leaf metabolism across biomes

O’Sullivan, Odhran; Heskel, Mary; Reich, Peter B.; Tjoelker, Mark G.; Weerasinghe, Lasantha; Penillard, Aurore; Zhu, Lingling; Egerton, John (Jack); Bloomfield, Keith; Creek, Danielle; Abdul Bahar, Nur; Griffin, Kevin L.; Hurry, Vaughan; Meir, Patrick; Turnbull, Matthew H.; Atkin, Owen

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High-temperature tolerance in plants is important in a warming world, with extreme heat waves predicted to increase in frequency and duration, potentially leading to lethal heating of leaves. Global patterns of high-temperature tolerance are documented in animals, but generally not in plants, limiting our ability to assess risks associated with climate warming. To assess whether there are global patterns in high-temperature tolerance of leaf metabolism, we quantified Tcrit (high temperature...[Show more]

dc.contributor.authorO’Sullivan, Odhran
dc.contributor.authorHeskel, Mary
dc.contributor.authorReich, Peter B.
dc.contributor.authorTjoelker, Mark G.
dc.contributor.authorWeerasinghe, Lasantha
dc.contributor.authorPenillard, Aurore
dc.contributor.authorZhu, Lingling
dc.contributor.authorEgerton, John (Jack)
dc.contributor.authorBloomfield, Keith
dc.contributor.authorCreek, Danielle
dc.contributor.authorAbdul Bahar, Nur
dc.contributor.authorGriffin, Kevin L.
dc.contributor.authorHurry, Vaughan
dc.contributor.authorMeir, Patrick
dc.contributor.authorTurnbull, Matthew H.
dc.contributor.authorAtkin, Owen
dc.date.accessioned2021-05-13T02:05:37Z
dc.date.available2021-05-13T02:05:37Z
dc.identifier.issn1354-1013
dc.identifier.urihttp://hdl.handle.net/1885/233011
dc.description.abstractHigh-temperature tolerance in plants is important in a warming world, with extreme heat waves predicted to increase in frequency and duration, potentially leading to lethal heating of leaves. Global patterns of high-temperature tolerance are documented in animals, but generally not in plants, limiting our ability to assess risks associated with climate warming. To assess whether there are global patterns in high-temperature tolerance of leaf metabolism, we quantified Tcrit (high temperature where minimal chlorophyll a fluorescence rises rapidly and thus photosystem II is disrupted) and Tmax (temperature where leaf respiration in darkness is maximal, beyond which respiratory function rapidly declines) in upper canopy leaves of 218 plant species spanning seven biomes. Mean site-based Tcrit values ranged from 41.5 °C in the Alaskan arctic to 50.8 °C in lowland tropical rainforests of Peruvian Amazon. For Tmax, the equivalent values were 51.0 and 60.6 °C in the Arctic and Amazon, respectively. Tcrit and Tmax followed similar biogeographic patterns, increasing linearly (˜8 °C) from polar to equatorial regions. Such increases in high-temperature tolerance are much less than expected based on the 20 °C span in high-temperature extremes across the globe. Moreover, with only modest high-temperature tolerance despite high summer temperature extremes, species in mid-latitude (~20–50°) regions have the narrowest thermal safety margins in upper canopy leaves; these regions are at the greatest risk of damage due to extreme heat-wave events, especially under conditions when leaf temperatures are further elevated by a lack of transpirational cooling. Using predicted heat-wave events for 2050 and accounting for possible thermal acclimation of Tcrit and Tmax, we also found that these safety margins could shrink in a warmer world, as rising temperatures are likely to exceed thermal tolerance limits. Thus, increasing numbers of species in many biomes may be at risk as heat-wave events become more severe with climate change.
dc.description.sponsorshipAccess to the two Peruvian sites was also facilitated by a Moore Foundation grant (Oliver Phillips, Yadvinder Mahli, and Jon Lloyd; www.rainfor.org). This work was funded by grants/fellowships from the Australian Research Council (DP0986823, DP130101252, CE140100008, FT0991448) to O.K.A., DP140103415 to M.G.T., FT110100457 to P.M., Natural Environment Research Council (UK) to P.M. (NERC NE/F002149/1), USA National Science Foundation to K.L.G. (DEB-1234162), U.S. Department of Energy to P.B.R. (DE-FG02-7ER64456), and U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research (BER) through the Southeastern Regional Center of the National Institute for Climatic Change Research at Duke University to M.G.T and Texas AgriLife Research to M.G.T.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherBlackwell Publishing Ltd
dc.rights© 2016 John Wiley & Sons Ltd
dc.sourceGlobal Change Biology
dc.subjectheat waves
dc.subjecthigh-temperature tolerance
dc.subjectlatitudinal patterns
dc.subjectphotosynthesis
dc.subjectrespiration,
dc.subjectTcrit
dc.subjecttemperature extremes
dc.subjectTmax
dc.titleThermal limits of leaf metabolism across biomes
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume23
dcterms.dateAccepted2016-08-13
dc.date.issued2016-10-14
local.identifier.absfor069902 - Global Change Biology
local.identifier.ariespublicationa383154xPUB4470
local.publisher.urlhttps://onlinelibrary.wiley.com/
local.type.statusPublished Version
local.contributor.affiliationO’Sullivan, Odhran, College of Science, ANU
local.contributor.affiliationHeskel, Mary, College of Science, ANU
local.contributor.affiliationReich, Peter B., Western Sydney University
local.contributor.affiliationTjoelker, Mark G., University of Western Sydney
local.contributor.affiliationWeerasinghe, Lasantha, College of Science, ANU
local.contributor.affiliationPenillard, Aurore, College of Science, ANU
local.contributor.affiliationZhu, Lingling, College of Science, ANU
local.contributor.affiliationEgerton, John (Jack), College of Science, ANU
local.contributor.affiliationBloomfield, Keith, College of Science, ANU
local.contributor.affiliationCreek, Danielle, College of Science, ANU
local.contributor.affiliationAbdul Bahar, Nur, College of Science, ANU
local.contributor.affiliationGriffin, Kevin L., Columbia University
local.contributor.affiliationHurry, Vaughan, Umea University
local.contributor.affiliationMeir, Patrick, College of Science, ANU
local.contributor.affiliationTurnbull, Matthew H., University of Canterbury
local.contributor.affiliationAtkin, Owen, College of Science, ANU
dc.relationhttp://purl.org/au-research/grants/arc/DP0986823
dc.relationhttp://purl.org/au-research/grants/arc/DP130101252
dc.relationhttp://purl.org/au-research/grants/arc/CE140100008
dc.relationhttp://purl.org/au-research/grants/arc/FT0991448
dc.relationhttp://purl.org/au-research/grants/arc/DP140103415
dc.relationhttp://purl.org/au-research/grants/arc/FT110100457
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage209
local.bibliographicCitation.lastpage223
local.identifier.doi10.1111/gcb.13477
dc.date.updated2020-11-23T11:21:54Z
local.identifier.scopusID2-s2.0-84991329860
local.identifier.thomsonID000390218300018
dcterms.accessRightsOpen Access
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/7003..."Author accepted manuscript can be made open access on non-commercial institutional repository after 12 month embargo" from SHERPA/RoMEO site (as at 13.5.2021).
CollectionsANU Research Publications

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