Skip navigation
Skip navigation

Stomatal, mesophyll conductance, and biochemical limitations to photosynthesis during induction

Sakoda, Kazuma; Yamori, Wataru; Groszmann, Michael; Evans, John

Description

The dynamics of leaf photosynthesis in fluctuating light affects carbon gain by plants. Mesophyll conductance (gm) limits CO2 assimilation rate (A) under the steady state, but the extent of this limitation under non-steady state conditions is unknown. In the present study, we aimed to characterize the dynamics of gm and the limitations to A imposed by gas diffusional and biochemical processes under fluctuating light. The induction responses of A, stomatal conductance (gs), gm, and the maximum...[Show more]

dc.contributor.authorSakoda, Kazuma
dc.contributor.authorYamori, Wataru
dc.contributor.authorGroszmann, Michael
dc.contributor.authorEvans, John
dc.date.accessioned2021-02-23T21:52:54Z
dc.identifier.issn0032-0889
dc.identifier.urihttp://hdl.handle.net/1885/224415
dc.description.abstractThe dynamics of leaf photosynthesis in fluctuating light affects carbon gain by plants. Mesophyll conductance (gm) limits CO2 assimilation rate (A) under the steady state, but the extent of this limitation under non-steady state conditions is unknown. In the present study, we aimed to characterize the dynamics of gm and the limitations to A imposed by gas diffusional and biochemical processes under fluctuating light. The induction responses of A, stomatal conductance (gs), gm, and the maximum rate of RuBP carboxylation (Vcmax) or electron transport (J) were investigated in Arabidopsis (Arabidopsis thaliana (L.)) and tobacco (Nicotiana tabacum L.). We first characterized gm induction after a change from darkness to light. Each limitation to A imposed by gm, gs and Vcmax, or J was significant during induction, indicating that gas diffusional and biochemical processes limit photosynthesis. Initially, gs imposed the greatest limitation to A, showing the slowest response under high light after long and short periods of darkness, assuming RuBP-carboxylation limitation. However, if RuBP-regeneration limitation was assumed, then J imposed the greatest limitation. gm did not vary much following short interruptions to light. The limitation to A imposed by gm was the smallest of all the limitations for most of the induction phase. This suggests that altering induction kinetics of mesophyll conductance would have little impact on A following a change in light. To enhance the carbon gain by plants under naturally dynamic light environments, attention should therefore be focused on faster stomatal opening or activation of electron transport.
dc.description.sponsorshipThis work was supported by KAKENHI to W.Y. (Grant Number: 16H06552, 18H02185, 18KK0170 and 20H05687) from Japan Society for the Promotion of Science (JSPS), Research Fellow to K.S. from JSPS (20J00594), and the Center of Excellence for Translational Photosynthesis to J.E. (Grant Number: CE140100015) from the Australian Research Council.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherOxford University Press on behalf of American Society of Plant Biologists
dc.rights© 2020 The Author(s)
dc.sourcePlant Physiology
dc.titleStomatal, mesophyll conductance, and biochemical limitations to photosynthesis during induction
dc.typeJournal article
dcterms.dateAccepted2020-10-22
dc.date.issued2020-11-30
local.publisher.urlhttps://academic.oup.com/
local.type.statusAccepted Version
local.contributor.affiliationSakoda, Kazuma, University of Tokyo
local.contributor.affiliationYamori, Wataru, University of Tokyo
local.contributor.affiliationGroszmann, Michael, Division of Plant Science, Research School of Biology, The Australian National University
local.contributor.affiliationEvans, John R., Division of Plant Science, Research School of Biology, The Australian National University
local.description.embargo2099-12-31
dc.relationhttp://purl.org/au-research/grants/arc/CE140100015
local.identifier.essn1532-2548
local.identifier.doi10.1093/plphys/kiaa011
dcterms.accessRightsOpen Access via publisher site
CollectionsANU Research Publications

Download

File Description SizeFormat Image
kiaa011.pdf2.6 MBAdobe PDF    Request a copy


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  19 May 2020/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator