Skip navigation
Skip navigation

Leaf shape influences spatial variation in photosynthetic function in Lomatia tinctoria

Leigh, Andrea; Hill, Ross; Ball, Marilyn

Description

A relationship exists between the two-dimensional shape of leaves and their venation architecture, such that broad or broad-lobed leaves can have leaf tissue far from major veins, potentially creating stronger gradients in water potential - and associated photosynthetic function - than found across narrow counterparts. We examined the spatial patterns of photosynthetic efficiency (ΔF/Fm′) and non-photochemical quenching (NPQ) in response to increased vapour pressure deficit (VPD) using two...[Show more]

dc.contributor.authorLeigh, Andrea
dc.contributor.authorHill, Ross
dc.contributor.authorBall, Marilyn
dc.date.accessioned2015-12-13T22:27:48Z
dc.identifier.issn1445-4408
dc.identifier.urihttp://hdl.handle.net/1885/74109
dc.description.abstractA relationship exists between the two-dimensional shape of leaves and their venation architecture, such that broad or broad-lobed leaves can have leaf tissue far from major veins, potentially creating stronger gradients in water potential - and associated photosynthetic function - than found across narrow counterparts. We examined the spatial patterns of photosynthetic efficiency (ΔF/Fm′) and non-photochemical quenching (NPQ) in response to increased vapour pressure deficit (VPD) using two morphs of Lomatia tinctoria (Labill.) R.Br: those with broad-lobed and those with narrow-lobed leaves. Stomatal conductance (gs), instantaneous water use efficiency (WUE), stomatal and minor veins density also were measured. ΔF/Fm′ decreased with stress but was higher and less spatially heterogeneous across broad than narrow lobes. The strongest depression in ΔF/Fm′ in broad lobes was at the edges and in narrow lobes, the tips. Non-photochemical quenching was spatially more varied in broad lobes, increasing at the edges and tips. Variation in photosynthetic function could not be explained by gs, WUE or minor vein density, whereas proximity to major veins appeared to mitigate water stress at the tips only for broad lobes. Our findings indicate that the relationship between venation architecture and water delivery alone can partially explain the spatial pattern of photosynthetic function.
dc.publisherCSIRO Publishing
dc.sourceFunctional Plant Biology
dc.titleLeaf shape influences spatial variation in photosynthetic function in Lomatia tinctoria
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume41
dc.date.issued2014
local.identifier.absfor060705 - Plant Physiology
local.identifier.ariespublicationU3488905xPUB3968
local.type.statusPublished Version
local.contributor.affiliationLeigh, Andrea, University of Technology Sydney
local.contributor.affiliationHill, Ross, The University of New South Wales
local.contributor.affiliationBall, Marilyn, College of Medicine, Biology and Environment, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue8
local.bibliographicCitation.startpage833
local.bibliographicCitation.lastpage842
local.identifier.doi10.1071/FP13334
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
dc.date.updated2015-12-11T08:34:37Z
local.identifier.scopusID2-s2.0-84904346709
local.identifier.thomsonID000340162000006
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_Leigh_Leaf_shape_influences_spatial_2014.pdf788.19 kBAdobe 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