Elucidating Cause of Inferior Color by a Decrease in Anthocyanin Concentration

Authors:Haffner Brenna, Ogunbona Philip


It has been reported that strawberries grown at high temperatures have a poor color. It is well known that high temperatures can adversely affect the pigmentation of many other plants, including the skin of Asian pears and the leaves of smoked trees (Cotinus coggygria). The reduction in anthocyanin concentration can be controlled by the expression of genes involved in anthocyanin synthesis. Anthocyanin synthesis requires two sets of genes: genes encoding enzymes that are directly involved in the synthesis of anthocyanins and other flavonoids, and regulatory genes that control the transcription of enzyme genes. Regarding regulatory genes, it has been demonstrated that the expression of a gene encoding an enzyme responsible for anthocyanin synthesis is regulated by the MYB-bHLH-WD40 transcription factor complex. We focused on FaMYB1, FaMYB5, and FaMYB10 isolated from previous studies. Other studies on the relationship between MYB and anthocyanin synthesis have found that in grape and apple varieties, MYB affects DFR (dihydroflavonol 4-reductase), UFGT (UDP-glucose: flavonoid 3-O-glucosyl) Transferase) promoter to regulate anthocyanin concentration.) And other enzyme genes. As mentioned above, high temperatures have been found to affect anthocyanin synthesis in several different plants.

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