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The slope of assimilation rate against stomatal conductance should not be used as a measure of water use efficiency or stomatal control over assimilation

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dc.contributor.authorBellasio, Chandra
dc.date.accessioned2025-02-03T02:42:12Z
dc.date.available2025-02-03T02:42:12Z
dc.date.issued2023
dc.date.updated2024-01-07T07:15:51Z
dc.description.abstractQuantifying water use efficiency, and the impact of stomata on CO2 uptake are pivotal in physiology and efforts to improve crop yields. Although tempting, relying on regression slopes from assimilation-stomatal conductance plots to estimate water use efficiency or stomatal control over assimilation is erroneous. Through numerical simulations, I substantiate this assertion. I propose the term ‘instantaneous transpiration efficiency’ for the assimilation-to-transpiration ratio to avoid confusion with ‘intrinsic water use efficiency’ which refers to the assimilation-to-stomatal conductance ratio, and recommend to compute both metrics for each gas exchange data point.
dc.description.sponsorshipOpen Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. I gratefully acknowledge funding by European Union’s Horizon 2020 research and innovation programme through a MSCA individual fellowship (Grant Agreement ID No: 702755), and by a Science Foundation Ireland Individual Pathway Fellowship (21/PATH-S/9322).
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0166-8595
dc.identifier.urihttps://hdl.handle.net/1885/733734628
dc.language.isoen_AUen_AU
dc.provenanceThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
dc.publisherSpringer
dc.rights© 2023 The authors
dc.rights.licenseCreative Commons Attribution licence
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourcePhotosynthesis Research
dc.titleThe slope of assimilation rate against stomatal conductance should not be used as a measure of water use efficiency or stomatal control over assimilation
dc.typeJournal article
dcterms.accessRightsOpen Access
local.bibliographicCitation.lastpage199
local.bibliographicCitation.startpage195
local.contributor.affiliationBellasio, Chandra, College of Science, ANU
local.contributor.authoruidBellasio, Chandra, u1025966
local.description.notesImported from ARIES
local.identifier.absfor310806 - Plant physiology
local.identifier.ariespublicationa383154xPUB44540
local.identifier.citationvolume158
local.identifier.doi10.1007/s11120-023-01054-6
local.identifier.scopusID2-s2.0-85175159063
local.publisher.urlhttps://link.springer.com/
local.type.statusPublished Version
publicationvolume.volumeNumber158

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