Developmental age and UV-B exposure co-determine antioxidant capacity and flavonol accumulation in Arabidopsis leaves

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dc.contributor.authorCsepregi, Kristóf
dc.contributor.authorCoffey, Aoife M.
dc.contributor.authorCunningham, Natalie
dc.contributor.authorPrinsen, Els
dc.contributor.authorHideg, Éva
dc.contributor.authorJansen, Marcel A. K.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderOrszágos Tudományos Kutatási Alapprogramoken
dc.contributor.funderFonds Wetenschappelijk Onderzoeken
dc.date.accessioned2017-05-25T14:28:12Z
dc.date.available2017-05-25T14:28:12Z
dc.date.issued2017-05-17
dc.date.updated2017-05-25T14:12:52Z
dc.description.abstractDevelopmental age is an important determinant of plant stress responses. In this study the importance of “within-individual-heterogeneity” of developmental age for plant UV-B responses was quantified. Arabidopsis thaliana rosettes were raised under indoor conditions, and the responses of leaves at different developmental stages were compared following exposure to supplemental UV-B radiation. Exposure to a low dose of UV-B had positive effects on concentrations of UV-absorbing pigments, quercetins and kaempferols as well as total antioxidant activity measured. Unlike UV-B, developmental age had a substantial effect on photochemistry, and especially energy dissipation. Younger leaves display relatively strong regulated dissipation, while older leaves show more non-regulated, non-photochemical energy dissipation. Developmental age also impacted on concentrations of UV-absorbing compounds, and antioxidant activity. In fact, developmental variation matched, or even exceeded the UV-induced response for these two parameters. Thus, pooling of rosette leaves is not necessarily a good strategy to visualise plant UV-responses. Rather, to fully understand plant UV-responses in a developmental context it is important to advance reporter technologies for physiological studies, including spin-trap technology to visualise in planta ROS and ROS-defences, and fluorescence excitation screening technology and chromogenic assays for in planta visualisation of specific UV-absorbing pigments.en
dc.description.sponsorshipScience Foundation Ireland (11/RFP.1/EOB/3303); Országos Tudományos Kutatási Alapprogramok, Hungarian National Research, Development and Innovation Office through the Hungarian Scientific Grant Agency (OTKA K112309); Fonds Wetenschappelijk Onderzoek, Fund of Scientific Research Flanders (G000515N).en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCsepregi, K., Coffey, A., Cunningham, N., Prinsen, E., Hideg, É. and Jansen, M. A. K. (2017) 'Developmental age and UV-B exposure co-determine antioxidant capacity and flavonol accumulation in Arabidopsis leaves', Environmental and Experimental Botany, 140, pp. 19-25. doi:10.1016/j.envexpbot.2017.05.009en
dc.identifier.doi10.1016/j.envexpbot.2017.05.009
dc.identifier.endpage25
dc.identifier.issn0098-8472
dc.identifier.journaltitleEnvironmental and Experimental Botanyen
dc.identifier.startpage19
dc.identifier.urihttps://hdl.handle.net/10468/4025
dc.identifier.volume140
dc.language.isoenen
dc.publisherElsevieren
dc.rights© 2016 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectAntioxidanten
dc.subjectArabidopsisen
dc.subjectDevelopmenten
dc.subjectFlavonolen
dc.subjectPhotochemistryen
dc.subjectUltraviolet-Ben
dc.titleDevelopmental age and UV-B exposure co-determine antioxidant capacity and flavonol accumulation in Arabidopsis leavesen
dc.typeArticle (peer-reviewed)en
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