The Functional Significance of Black-Pigmented Leaves: Photosynthesis, Photoprotection and Productivity in Ophiopogon planiscapus ‘Nigrescens’

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dc.contributor.authorHatier, Jean-Hugues B.
dc.contributor.authorClearwater, Michael J.
dc.contributor.authorGould, Kevin S.
dc.coverage.spatialUnited Statesen_NZ
dc.date.accessioned2013-08-26T04:00:29Z
dc.date.available2013-08-26T04:00:29Z
dc.date.copyright2013-06-24
dc.date.issued2013
dc.description.abstractBlack pigmented leaves are common among horticultural cultivars, yet are extremely rare across natural plant populations. We hypothesised that black pigmentation would disadvantage a plant by reducing photosynthesis and therefore shoot productivity, but that this trait might also confer protective benefits by shielding chloroplasts against photo-oxidative stress. CO2 assimilation, chlorophyll a fluorescence, shoot biomass, and pigment concentrations were compared for near isogenic green- and black-leafed Ophiopogon planiscapus ‘Nigrescens’. The black leaves had lower maximum CO2 assimilation rates, higher light saturation points and higher quantum efficiencies of photosystem II (PSII) than green leaves. Under saturating light, PSII photochemistry was inactivated less and recovered more completely in the black leaves. In full sunlight, green plants branched more abundantly and accumulated shoot biomass quicker than the black plants; in the shade, productivities of the two morphs were comparable. The data indicate a light-screening, photoprotective role of foliar anthocyanins. However, limitations to photosynthetic carbon assimilation are relatively small, insufficient to explain the natural scarcity of black-leafed plants.en_NZ
dc.format.mimetypeapplication/pdf
dc.identifier.citationHatier, J.-H. B., Clearwater, M. J. & Gould, K. S. (2013). The functional significance of black-pigmented leaves: Photosynthesis, photoprotection and productivity in ophiopogon planiscapus ‘Nigrescens’. PLoS One, 8(6), e678550.en_NZ
dc.identifier.doi10.1371/journal.pone.0067850en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/7889
dc.language.isoenen_NZ
dc.publisherPublic Library of Scienceen_NZ
dc.relation.isPartOfPlos Oneen_NZ
dc.relation.ispartofPLoS ONE
dc.relation.urihttp://www.plosone.org/article/info:doi/10.1371/journal.pone.0067850#authcontriben_NZ
dc.rights© 2013 Hatier et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en_NZ
dc.titleThe Functional Significance of Black-Pigmented Leaves: Photosynthesis, Photoprotection and Productivity in Ophiopogon planiscapus ‘Nigrescens’en_NZ
dc.typeJournal Articleen_NZ
pubs.begin-page1en_NZ
pubs.editione67850en_NZ
pubs.elements-id38859
pubs.end-page13en_NZ
pubs.issue6en_NZ
pubs.volume8en_NZ
uow.identifier.article-noARTN e67850en_NZ
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