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UV-B Exposure of Indoor-Grown Picea abies Seedlings Causes an Epigenetic Effect and Selective Emission of Terpenes
KTH, School of Biotechnology (BIO). (Biokemi)
KTH, School of Biotechnology (BIO). KTH, School of Chemical Science and Engineering (CHE), Chemistry. (Biokemi)
Dalarna University.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
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2013 (English)In: Zeitschrift für Naturforschung C - A Journal of Biosciences, ISSN 0939-5075, Vol. 68, no 3-4, 139-147 p.Article in journal (Refereed) Published
Abstract [en]

Terpenoids  are  involved  in  various  defensive  functions  in  plants,  especially  conifers.  Epi-genetic  mechanisms,  for  example  DNA  methylation,  can  infl uence  plant  defence  systems. The purpose of the present study was to investigate the infl uence of UV-B exposure on the release  of  terpenoids  from  spruce  seedlings  and  on  needle  DNA  methylation.  Ten-week-old  seedlings  grown  indoors  were  exposed  to  UV-B  radiation  during  4 h,  and  the  volatile compounds  emitted  from  the  seedlings  were  analysed.  Analysis  of  the  volatiles  1,  3,  and 22 d after this UV-B exposure showed that bornyl acetate, borneol, myrcene, and limonene contents increased during the fi rst 3 days, while at day 22 the level of emission had returned to the control level. UV-B exposure decreased the level of DNA methylation in needles of young  seedlings,  refl ected  in  methylation  changes  in  CCGG  sequences.  Exposure  of  young seedlings  to  UV-B  radiation  might  be  a  way  to  potentiate  the  general  defensive  capacity, improving their ability to survive in outdoor conditions. UV-B-induced defence is discussed in the light of epigenetic mechanisms.

Place, publisher, year, edition, pages
Tübingen: Verlag der Zeitschrift für Naturforschung , 2013. Vol. 68, no 3-4, 139-147 p.
Keyword [en]
Ultraviolet radiation, spruce, plant defense, DNA methylation, volatiles, terpenes
National Category
Natural Sciences Forest Science
URN: urn:nbn:se:kth:diva-121322ISI: 000322090700010PubMedID: 23819310ScopusID: 2-s2.0-84878776812OAI: diva2:618371

QC 20130823

Available from: 2013-04-26 Created: 2013-04-26 Last updated: 2013-08-23Bibliographically approved

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Ohlsson, Anna B.Segerfeldt, PatrikBorg-Karlsson, Anna-Karin M.Berglund, Torkel
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