Synthesis of betanin by expression of the core betalain biosynthetic pathway in carrot

文献类型： 外文期刊

第一作者： Wang, Bo

作者： Wang, Bo;Wang, Yahui;Deng, Yuanjie;Xiong, Aisheng;Wang, Bo;Yao, Quanhong

作者机构：

关键词： Daucus carota L.; Betanin; Biosynthesis; Metabolic engineering; Bioforti fication

期刊名称：HORTICULTURAL PLANT JOURNAL （ 影响因子：5.7； 五年影响因子：5.4 ）

ISSN： 2095-9885

年卷期： 2024 年 10 卷 3 期

页码：

收录情况： SCI

摘要： Betalain has received increased attention because of its high nutritional value and crucial physiological functions. Based on the elucidation of its core biosynthetic pathway, betalain can be produced in additional plants by metabolic engineering. Synthesis of betalain in carrot (Daucus carota L.) can improve its nutritional quality and economic value by extracting betalain from the fleshy root, non-edible part, and processing residue of carrot. In this study, two different constructs, namely, pYB:mCD (AomelOS, BvCYP76AD1S, and BvDODA1S) and pYB:CDD (BvCYP76AD1S, BvDODA1S, and MjcDOPA5GTS), were introduced into carrot for betanin synthesis by Agrobacterium-mediated transformation. Betanin can be synthetized in both transgenic calli, and pYB:mCD-transgenic callus can be used to produce betacyanin by suspension culture. However, pYB:mCD-transgenic seedlings can synthetize betanin only by tyrosine feeding. The pYB:CDD-transgenic lines can synthetize betanin in whole plants. The betanin content in fleshy root of pYB:CDD-transgenic carrot was (63.4 +/- 9) mg $g-1 fresh weight according to quantitative analysis. These betanin-producing carrot plant materials can be used to synthesize betanin for industrial application or consumption as dietary sources.

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