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dc.contributor.authorResco de Dios, Víctor
dc.contributor.authorLoik, Michael E.
dc.contributor.authorSmith, Renee
dc.contributor.authorAspinwall, Michael J.
dc.contributor.authorTissue, David T.
dc.date.accessioned2015-11-25T18:37:33Z
dc.date.available2016-07-03T23:11:15Z
dc.date.issued2015
dc.identifier.issn0140-7791
dc.identifier.urihttp://hdl.handle.net/10459.1/49062
dc.description.abstractCircadian resonance, whereby a plant's endogenous rhythms are tuned to match environmental cues, has been repeatedly shown to be adaptive, although the underlying mechanisms remain elusive. Concomitantly, the adaptive value of nocturnal transpiration in C3 plants remains unknown because it occurs without carbon assimilation. These seemingly unrelated processes are interconnected because circadian regulation drives temporal patterns in nocturnal stomatal conductance, with maximum values occurring immediately before dawn for many species. We grew individuals of six Eucalyptus camaldulensis genotypes in naturally lit glasshouses and measured sunset, predawn and midday leaf gas exchange and whole-plant biomass production. We tested whether sunrise anticipation by the circadian clock and subsequent increases in genotype predawn stomatal conductance led to rapid stomatal opening upon illumination, ultimately affecting genotype differences in carbon assimilation and growth. We observed faster stomatal responses to light inputs at sunrise in genotypes with higher predawn stomatal conductance. Moreover, early morning and midday stomatal conductance and carbon assimilation, leaf area and total plant biomass were all positively correlated with predawn stomatal conductance across genotypes. Our results lead to the novel hypothesis that genotypic variation in the circadian-regulated capacity to anticipate sunrise could be an important factor underlying intraspecific variation in tree growth.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherJohn Wiley & Sons
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1111/pce.12598
dc.relation.ispartofPlant Cell and Environment, 2015
dc.rights(c) John Wiley & Sons, 2015
dc.subject.classificationDiòxid de carboni
dc.subject.classificationAdaptació de les plantes
dc.subject.classificationAclimatació (Plantes)
dc.subject.otherCarbon dioxide
dc.subject.otherPlant adaptation
dc.subject.otherAcclimatization (Plants)
dc.titleGenetic variation in circadian regulation of nocturnal stomatal conductance enhances carbon assimilation and growth
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2015-11-25T18:37:33Z
dc.identifier.idgrec023510
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.1111/pce.12598


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