biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 52:391-395, 2008 | DOI: 10.1007/s10535-008-0082-8

Effect of wounding on chalcone synthase and pathogenesis related PR-10 gene expression and content of phenolic compounds in bilberry leaves

L. Jaakola1,*, J. J. Koskimäki1, K. R. Riihinen2, A. Tolvanen3, A. Hohtola1
1 Department of Biology, University of Oulu, Oulu, Finland
2 Department of Biosciences, University of Kuopio, Kuopio, Finland
3 Finnish Forest Research Institute, Muhos Research Station, Muhos, Finland

The influence of artificial wounding on biosynthesis of flavonoids and hydroxycinnamic acids was studied in bilberry leaves using two separate wounding experiments. In the first experiment bilberry leaves were wounded by cutting. The expression of the first gene from flavonoid pathway, chalcone synthase (CHS) and a wound induced pathogenesis related PR-10 gene was analysed from samples collected immediately and after 3, 6, 24 h and 4 d from the wounding treatment. In the second experiment annual shoots were removed. Proanthocyanidins, flavonol glycosides and hydroxycinnamic acids were quantified in leaf samples after 0-5 d (experiment 1) and 5 weeks (experiment 2) from the treatment. In the first experiment, no change was observed in the expression of CHS whereas increase in expression of PR-10 gene was detected after 6 h of wounding treatment. In both experiments, the contents of flavonol glycosides and hydroxycinnamic acids were not influenced by the wounding treatment and the contents of proanthocyanidins were decreased.

Keywords: flavonoids; hydroxycinnamic acids; simulated herbivory
Subjects: bilberry; flavonoids; hydroxycinnamic acids; phenolics; Vaccinium myrtillus

Received: September 20, 2006; Accepted: January 19, 2007; Published: June 1, 2008  Show citation

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Jaakola, L., Koskimäki, J.J., Riihinen, K.R., Tolvanen, A., & Hohtola, A. (2008). Effect of wounding on chalcone synthase and pathogenesis related PR-10 gene expression and content of phenolic compounds in bilberry leaves. Biologia plantarum, 52(2), 391-395. doi: 10.1007/s10535-008-0082-8
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