Abstract
DNA methylation is known to be involved in the regulation of plant development and defense mechanisms. However, there is a general lack of data on the role of methylation in plant secondary metabolism. We have investigated the effect of a cytidine analog, 5-azacytidine (azaC), which is known to block DNA methylation, on resveratrol biosynthesis and stilbene synthase (STS) gene expression in Vitis amurensis cultured cells. Resveratrol is a naturally occurring polyphenol that has been reported to exhibit a wide range of important biological and pharmacological properties. We previously obtained a control cell line of V. amurensis (VV) as well as a rolB-transgenic cell line of V. amurensis (VB2) that has a higher level of resveratrol accumulation. In our experimental setup, the azaC-treated VV and VB2 calli produced 0.092% and 0.455% dry weight (DW) resveratrol, respectively. We found that treatment with 200 μM of azaC resulted in 1.9- and 2.0-fold increases in resveratrol production in VV and VB2 calli, respectively. A quantitative real-time PCR assay for STS gene expression in the azaC-treated VV and VB2 cells revealed that there were statistically increased expression levels of VaSTS10 in VV calli and of VaSTS5, VaSTS6, and VaSTS10 in VB2 calli. These results demonstrate that azaC is able to increase resveratrol production in V. amurensis calli through a mechanism that involves the induction of STS gene expression.
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Abbreviations
- azaC:
-
5-Azacytidine
- STS:
-
Stilbene synthase
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Acknowledgments
The authors express their thanks to Alexandra Dubrovina for helpful comments on the manuscript. This work was supported by grant of the Russian Foundation for Basic Research (10-04-00189-a) and by grants of the Far East Division of the Russian Academy of Sciences (09-III-A-06-169, 09-III-B-06-234, and 10-III-B-06-100).
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Kiselev, K.V., Tyunin, A.P., Manyakhin, A.Y. et al. Resveratrol content and expression patterns of stilbene synthase genes in Vitis amurensis cells treated with 5-azacytidine. Plant Cell Tiss Organ Cult 105, 65–72 (2011). https://doi.org/10.1007/s11240-010-9842-1
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DOI: https://doi.org/10.1007/s11240-010-9842-1