Two Genes, ANS and UFGT2, from Vaccinium Spp. Are Key Steps for Modulating Anthocyanin Production

Overview

Journal Front Plant Sci

Date 2023 Feb 23

PMID 36818839

Authors

Han M Nguyen

Joanna Putterill

Andrew P Dare

Blue J Plunkett

Janine Cooney

Yongyan Peng

Edwige J F Souleyre

Nick W Albert

Richard V Espley

Catrin S Gunther

Affiliations

Soon will be listed here.

Abstract

Anthocyanins are a major group of red to blue spectrum plant pigments with many consumer health benefits. Anthocyanins are derived from the flavonoid pathway and diversified by glycosylation and methylation, involving the concerted action of specific enzymes. Blueberry and bilberry ( spp.) are regarded as 'superfruits' owing to their high content of flavonoids, especially anthocyanins. While ripening-related anthocyanin production in bilberry () and blueberry () is regulated by the transcriptional activator MYBA1, the role of specific structural genes in determining the concentration and composition of anthocyanins has not been functionally elucidated. We isolated three candidate genes, (), () and (), from , which were predominantly expressed in pigmented fruit skin tissue and showed high homology between bilberry and blueberry. -mediated transient expression of showed that overexpression of in combination with significantly increased anthocyanin concentration (3-fold). Overexpression of showed no effect above that induced by , while modulated anthocyanin composition to produce delphinidin-3-galactosylrhamnoside, not naturally produced in tobacco. In strawberry (), combined transient overexpression of with a ´ from kiwifruit () modulated the anthocyanin profile to include galactosides and arabinosides of delphinidin and cyanidin, major anthocyanins in blueberry and bilberry. These findings provide insight into the role of the final steps of biosynthesis in modulating anthocyanin production in and may contribute to the targeted breeding of new cultivars with improved nutritional properties.

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