| Title: | UV-B exposure of indoor-grown Picea abies seedlings causes an epigenetic effect and selective emission of terpenes |
| Author(s): | Ohlsson AB; Segerfeldt P; Lindstrom A; Borg-Karlson AK; Berglund T; |
| Address: | "KTH, Royal Institute of Technology, School of Biotechnology, Department of Biochemistry, AlbaNova University Center, SE-106 91 Stockholm, Sweden. annao@biotech.kth.se" |
| ISSN/ISBN: | 0939-5075 (Print) 0341-0382 (Linking) |
| Abstract: | "Terpenoids are involved in various defensive functions in plants, especially conifers. Epigenetic mechanisms, for example DNA methylation, can influence plant defence systems. The purpose of the present study was to investigate the influence 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 first 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, reflected 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" |
| Keywords: | "DNA Methylation Epigenesis, Genetic/*radiation effects Picea/genetics/growth & development/*radiation effects Terpenes/*metabolism *Ultraviolet Rays Volatile Organic Compounds/metabolism;" |
| Notes: | "MedlineOhlsson, Anna B Segerfeldt, Patrik Lindstrom, Anders Borg-Karlson, Anna-Karin Berglund, Torkel eng Research Support, Non-U.S. Gov't Germany 2013/07/04 Z Naturforsch C J Biosci. 2013 Mar-Apr; 68(3-4):139-47" |
