Temperature responses of mesophyll conductance differ greatly between species

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dc.contributor.authorvon Caemmerer, Susanne
dc.contributor.authorEvans, John R.
dc.date.accessioned2015-05-01T02:12:56Z
dc.date.available2015-05-01T02:12:56Z
dc.date.issued2015-04
dc.date.updated2015-12-10T10:21:30Z
dc.description.abstractThe temperature responses of mesophyll conductance (gm ) were investigated for nine species using carbon isotope techniques combining tunable diode laser spectroscopy and gas exchange measurements. Species included the evergreen trees Eucalyptus pauciflora and Quercus engelmannii; the tropical evergreen tree Lophostemon confertus; as well as the herbaceous species Nicotiana tabacum, Oryza sativa, Triticum aestivum, Gossypium hirsutum, Glycine max and Arabidopsis thaliana. Responses varied from a two- to threefold increase in mesophyll conductance between 15 and 40 °C observed for N. tabacum, G. hirsutum, G. max and E. pauciflora to almost no change in L. confertus and T. aestivum. To account for the different temperature responses between species, we suggest that there must be variation in both the activation energy for membrane permeability and the effective pathlength for liquid phase diffusion. Stomatal conductance was relatively independent of increases in leaf temperature and concomitant increases in leaf to air vapour pressure difference. Two exceptions were Eucalyptus and Gossypium, where stomatal conductance increased with temperature up to 35 °C despite increasing leaf to air vapour pressure. For a given species, temperature responses of stomatal and mesophyll conductance were independent of one another.
dc.description.sponsorshipThis research was supported by an Australian ResearchCouncil Discovery Grant (DP110104269).en_AU
dc.identifier.issn0140-7791en_AU
dc.identifier.urihttp://hdl.handle.net/1885/13364
dc.publisherWiley
dc.relationhttp://purl.org/au-research/grants/arc/DP110104269
dc.rights© 2014 John Wiley & Sons Ltd
dc.sourcePlant, Cell & Environment
dc.subjectco₂ diffusion
dc.subjectstomatal conductance
dc.subjectVcmax
dc.subjectcarbon isotope discrimination
dc.subjectmembrane permeability
dc.titleTemperature responses of mesophyll conductance differ greatly between species
dc.typeJournal article
local.bibliographicCitation.issue4en_AU
local.bibliographicCitation.lastpage637en_AU
local.bibliographicCitation.startpage629en_AU
local.contributor.affiliationvon Caemmerer, S., Research School of Biology, The Australian National Universityen_AU
local.contributor.affiliationEvans, J. R., Research School of Biology, The Australian National Universityen_AU
local.contributor.authoremailsusanne.caemmerer@anu.edu.auen_AU
local.contributor.authoruidu8303000en_AU
local.identifier.absfor060705 - Plant Physiology
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
local.identifier.ariespublicationa383154xPUB1247
local.identifier.citationvolume38en_AU
local.identifier.doi10.1111/pce.12449en_AU
local.identifier.essn1365-3040en_AU
local.identifier.scopusID2-s2.0-84924700846
local.identifier.uidSubmittedByu1005913en_AU
local.publisher.urlhttp://www.wiley-vch.de/publish/en/en_AU
local.type.statusPublished Versionen_AU

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