UV-B Exposure of Indoor-Grown Picea abies Seedlings Causes an Epigenetic Effect and Selective Emission of Terpenes
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
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.
Ultraviolet radiation, spruce, plant defense, DNA methylation, volatiles, terpenes
Natural Sciences Forest Science
IdentifiersURN: urn:nbn:se:kth:diva-121322ISI: 000322090700010PubMedID: 23819310ScopusID: 2-s2.0-84878776812OAI: oai:DiVA.org:kth-121322DiVA: diva2:618371
QC 201308232013-04-262013-04-262013-08-23Bibliographically approved