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A SQUAMOSA MADS-box gene involved in the regulation of anthocyanin accumulation in bilberry fruits
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Jaakola, Laura, Poole, Mervin, Jones, Matthew O., Kämäräinen-Karppinen, Terttu, Koskimäki, Janne J., Hohtola, Anja, Häggman, Hely, Fraser, Paul D., Manning, Kenneth, King , Graham J., Thomson, H. (Helen) and Seymour, G. B. (Graham B.) (2010) A SQUAMOSA MADS-box gene involved in the regulation of anthocyanin accumulation in bilberry fruits. Plant Physiology, Vol.153 (No.4). doi:10.1104/pp.110.158279 ISSN 0032-0889.
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Official URL: http://dx.doi.org/10.1104/pp.110.158279
Abstract
Anthocyanins are important health promoting phytochemicals that are abundant in many fleshy fruits. Bilberry (Vaccinium myrtillus L.) is one of the best sources of these compounds. Here we report on the expression pattern and functional analysis of a SQUAMOSA (SQUA) class MADS-box transcription factor, VmTDR4, associated with anthocyanin biosynthesis in bilberry. Levels of VmTDR4 expression were spatially and temporally linked with colour development and anthocyanin-related gene expression. Virus induced gene silencing (VIGS) was used to suppress VmTDR4 expression in bilberry resulting in substantial reduction in anthocyanin levels in fully ripe fruits. Chalcone synthase was used a positive control in the VIGS experiments. Additionally, in sectors of fruit tissue in which the expression of the VmTDR4 gene was silenced, the expression of R2R3 MYB family transcription factors related to the biosynthesis of flavonoids were also altered. We conclude that VmTDR4 plays an important role in the accumulation of anthocyanins during normal ripening in bilberry; probably through direct or indirect control of transcription factors belonging to the R2R3 MYB family.
Item Type: | Journal Article | ||||
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Subjects: | S Agriculture > SB Plant culture Q Science > QH Natural history > QH426 Genetics |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Warwick HRI (2004-2010) | ||||
Library of Congress Subject Headings (LCSH): | Bilberry -- Genetic aspects, Anthocyanins -- Research, Phytochemicals -- Regulation, Transcription factors | ||||
Journal or Publication Title: | Plant Physiology | ||||
Publisher: | American Society of Plant Biologists | ||||
ISSN: | 0032-0889 | ||||
Official Date: | August 2010 | ||||
Dates: |
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Volume: | Vol.153 | ||||
Number: | No.4 | ||||
DOI: | 10.1104/pp.110.158279 | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Open Access (Creative Commons) |
Data sourced from Thomson Reuters' Web of Knowledge
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