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dc.contributor.authorMITCHELL, FRASER JOHN GRAY
dc.contributor.authorMurphy, B.R.
dc.date.accessioned2014-12-17T10:46:03Z
dc.date.available2014-12-17T10:46:03Z
dc.date.issued2013
dc.date.submitted2013en
dc.identifier.citationMurphy, B.R. and Mitchell, F.J.G.,, An association between past levels of ozone column depletion and the pollen morphology of the model angiosperm Arabidopsis thaliana L, Review of Palaeobotany and Palynology, 194, 2013, 12 - 20en
dc.identifier.otherY
dc.identifier.urihttp://hdl.handle.net/2262/72535
dc.descriptionPUBLISHEDen
dc.description.abstractThe currently reduced stratospheric ozone layer remains sensitive to destructive anthropogenic and natural inputs. We hypothesised that a sudden increase in surface ultraviolet-B (UV-B) irradiation, as may have occurred in a past mass extinction event, would have a significant effect on the pollen grain morphology of the model angiosperm Arabidopsis thaliana L. Plants of Arabidopsis thaliana in controlled-environment chambers were exposed to an increase in UV-B irradiation associated with an ozone column reduction of 70%. Pollen grains were examined with light and electron microscopy for morphological abnormalities. In this study, we found that a wild-type Arabidopsis thaliana accession showed a significant increase in the proportion of pollen grain morphological abnormalities in response to the increase in UV-B irradiation. Plants exposed to ambient conditions in early growth had less pollen morphological abnormalities when exposed to a subsequent increase in UV-B. Results here suggest that any future decrease in stratospheric ozone similar to that implicated in the end-Permian mass extinction event may increase angiosperm pollen morphological abnormalities, with uncertain and potentially negative consequences for plant reproductive success.en
dc.format.extent12en
dc.format.extent20en
dc.language.isoenen
dc.relation.ispartofseriesReview of Palaeobotany and Palynology;
dc.relation.ispartofseries194;
dc.rightsYen
dc.subjectArabidopsis thalianaen
dc.subjectUltraviolet-B irradiationen
dc.subjectOzone Layeren
dc.subjectPollen abnormalitiesen
dc.subjectMass Extinction Eventen
dc.titleAn association between past levels of ozone column depletion and the pollen morphology of the model angiosperm Arabidopsis thaliana Len
dc.typeJournal Articleen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/fmitchll
dc.identifier.rssinternalid85224
dc.rights.ecaccessrightsOpenAccess


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