ArticleProtoplasma2026
3-dehydroquinate synthase contributes to anthocyanin accumulation and flower pigmentation in petunia.
Article in Protoplasma, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Abstract
Anthocyanin biosynthesis in plants depends on the supply of aromatic amino acids. These amino acids are produced through the shikimate pathway. DHQS functions in an early reaction of the shikimate pathway and mediates the production of 3-dehydroquinate (DHQ) from 3-deoxy-D-arabino-heptulosonate 7-phosphate (DAHP). However, it is unclear whether DHQS contributes to the biosynthesis of flavonoids and anthocyanins. In this study, a single member of the DHQS family, PhDHQS, was identified in Petunia hybrida. GFP fusion protein analysis showed that PhDHQS is localized in chloroplasts. PhDHQS was highly expressed in the corolla, with the highest expression at the flower coloration stage, corresponding to flower buds of approximately 4 cm in length. Silencing of PhDHQS caused lighter flower coloration and significantly lower anthocyanin levels. Metabolomic analysis showed that six core anthocyanin compounds were significantly downregulated in PhDHQS-silenced corollas. These results suggest that PhDHQS contributes to anthocyanin accumulation by modulating the supply of phenylalanine-related precursors, providing new insights into the contribution of upstream shikimate pathway enzymes to flower color formation.
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