Anthocyanin synthesis, enhancement

Cell line selection is one of the traditional and effective approaches to enhancing metabolite accumulation, and biochemical studies provide the fundamental information for the intentional regulation of secondary metabolism in plant cells. In a carrot suspension culture regulated by 2,4-dichlorophenoxyace-tic acid, Ozeki et al. [7] found that there was a correlation between anthocyanin synthesis and morphological differentiation for somatic embryogenesis they also demonstrated the induction and repression of phenylalanine ammonia lyase (PAL) and chalcone synthase correlated with formation of the respective mRNAs. Two biosynthetic enzymes, i. e., PAL and 3-hydroxymethylglutaryl-CoA reductase, were also related with shikonin formation in Lithospermum erythro-rhizon cultures [8]. 

Danes, G., Kondrak, M., Banfalvi, Z. (2008). The effects of enhanced methionine synthesis on amino acid and anthocyanin content of potato tubers. BMC Plant Biol., 8, 65. 

Water stress may upregulate the phenyl propanoid synthesis pathway and hence enhance the level of anthocyanin and hydroxycinnamic acids contributing to elevated levels of antioxidants in sweet potato roots (Philpott et al. 2003). Drought and cold stresses elevated (-)-epicatechin and some flavonoid levels in hawthorn... 

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