Structural and hydraulic correlates of heterophylly in Ginkgo biloba

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dc.contributor.authorLeigh, Andrea
dc.contributor.authorZwieniecki, Maciej
dc.contributor.authorRockwell, F.E.
dc.contributor.authorBoyce, C Kevin
dc.contributor.authorNicotra, Adrienne
dc.contributor.authorHolbrook, Noel Michele
dc.date.accessioned2015-12-10T23:16:37Z
dc.date.issued2011
dc.date.updated2016-02-24T08:08:42Z
dc.description.abstractThis study investigates the functional significance of heterophylly in Ginkgo biloba, where leaves borne on short shoots are ontogenetically distinct from those on long shoots. Short shoots are compact, with minimal internodal elongation; their leaves are supplied with water through mature branches. Long shoots extend the canopy and have significant internodal elongation; their expanding leaves receive water from a shoot that is itself maturing. Morphology, stomatal traits, hydraulic architecture, Huber values, water transport efficiency, in situ gas exchange and laboratory-based steady-state hydraulic conductance were examined for each leaf type. Both structure and physiology differed markedly between the two leaf types. Short-shoot leaves were thinner and had higher vein density, lower stomatal pore index, smaller bundle sheath extensions and lower hydraulic conductance than long-shoot leaves. Long shoots had lower xylem area : leaf area ratios than short shoots during leaf expansion, but this ratio was reversed at shoot maturity. Long-shoot leaves had higher rates of photosynthesis, stomatal conductance and transpiration than short-shoot leaves. We propose that structural differences between the two G. biloba leaf types reflect greater hydraulic limitation of long-shoot leaves during expansion. In turn, differences in physiological performance of short- and long-shoot leaves correspond to their distinct ontogeny and architecture.
dc.identifier.issn0028-646X
dc.identifier.urihttp://hdl.handle.net/1885/65144
dc.publisherCambridge University Press
dc.sourceNew Phytologist
dc.subjectKeywords: water; anatomy; foliage; gas exchange; gymnosperm; hydraulic conductivity; ontogeny; photosynthesis; shoot; stomatal conductance; transpiration; xylem; article; cytology; gas; Ginkgo biloba; histology; metabolism; organ size; permeability; physiology; pla Ginkgo biloba; Heterophylly; Leaf anatomy; Leaf hydraulic conductance; Long shoot; Short shoot
dc.titleStructural and hydraulic correlates of heterophylly in Ginkgo biloba
dc.typeJournal article
local.bibliographicCitation.issue2
local.bibliographicCitation.lastpage470
local.bibliographicCitation.startpage459
local.contributor.affiliationLeigh, Andrea, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationZwieniecki, Maciej, Harvard University
local.contributor.affiliationRockwell, F.E., Harvard University
local.contributor.affiliationBoyce, C Kevin, University of Chicago
local.contributor.affiliationNicotra, Adrienne, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationHolbrook, Noel Michele, Harvard University
local.contributor.authoremailu9807999@anu.edu.au
local.contributor.authoruidLeigh, Andrea, u9212503
local.contributor.authoruidNicotra, Adrienne, u9807999
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor060705 - Plant Physiology
local.identifier.absseo960899 - Flora, Fauna and Biodiversity of environments not elsewhere classified
local.identifier.ariespublicationf2965xPUB1059
local.identifier.citationvolume189
local.identifier.doi10.1111/j.1469-8137.2010.03476.x
local.identifier.scopusID2-s2.0-78650409688
local.identifier.thomsonID000285761500013
local.identifier.uidSubmittedByf2965
local.type.statusPublished Version

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