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dc.contributor.authorSchroeter, Burkhard
dc.contributor.authorGreen, T.G. Allan
dc.contributor.authorKulle, Daniel
dc.contributor.authorPannewitz, Stefan
dc.contributor.authorSchlensog, Mark
dc.contributor.authorSancho, Leopoldo G.
dc.date.accessioned2012-06-22T02:37:32Z
dc.date.available2013-06-30T20:53:54Z
dc.date.copyright2012-06-09
dc.date.issued2012
dc.identifier.citationSchroeter, B., Green, T.G.A., Kulle, D., Pannewitz, S., Schlensog, M. & Sancho, L.G. (2012). The moss Bryum argenteum var. muticum Brid. is well adapted to cope with high light in continental Antarctica. Antarctic Science, 24(3), 281-291.en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/6420
dc.description.abstractThe net photosynthetic rate (NP), chlorophyll fluorescence, carotenoid content and chlorophyll content of the cosmopolitan moss Bryum argenteum were measured in the field at Botany Bay, southern Victoria Land, continental Antarctica (77°S). Comparisons were made between sun- and shade-adapted forms, and changes were followed as the moss emerged from under the snow and during exposure of shade and sun forms to ambient light. Shade forms had lower light compensation and saturation values for NP but little difference in maximal NP rates. Shade forms exposed to ambient light changed rapidly (within five days) towards the performance of the sun forms. Surprisingly, this change was not by acclimation of shoots but by the production of new shoots. Chlorophyll and carotenoid levels measured on a molar chlorophyll basis showed no difference between sun and shade forms and also little change during emergence. The constant molar relationship between carotenoids and chlorophyll plus the high levels of the xanthophyll cycle pigments suggest that protection of the chlorophyll antenna was constitutive. This is an adaptation to the very high light levels that occur when the plants are active in continental Antarctica and contrasts to the situation in more temperate areas where high light is normally avoided by desiccation.en_NZ
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherCambridge University Pressen_NZ
dc.relation.ispartofAntarctic Science
dc.relation.urihttp://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8596327en_NZ
dc.rightsThis article has been published in the journal: Antarctic Science. © Antarctic Science Ltd. Used with permission.en_NZ
dc.subjectacclimationen_NZ
dc.subjectcarotenoidsen_NZ
dc.subjectchlorophyll fluorescenceen_NZ
dc.subjectglutathioneen_NZ
dc.subjectphotosynthesisen_NZ
dc.subjectVAZen_NZ
dc.titleThe moss Bryum argenteum var. muticum Brid. is well adapted to cope with high light in continental Antarcticaen_NZ
dc.typeJournal Articleen_NZ
dc.identifier.doi10.1017/S095410201200003Xen_NZ
dc.relation.isPartOfAntarctic Scienceen_NZ
pubs.begin-page281en_NZ
pubs.elements-id37631
pubs.end-page291en_NZ
pubs.issue3en_NZ
pubs.volume24en_NZ


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