期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 64, 期 14, 页码 2932-2940出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b00270
关键词
marker-free transgenic potato; phenylpropanoid improved; antioxidant capacity; MYB transcription factors
资金
- Natural Science Foundation of Shandong Province [2015ZRB01143]
- National Natural Science Foundation of China [31171836]
- Ph.D. Programs Foundation of the Ministry of Education of China [20113702110003]
- Taishan Industrial Experts Programme [tscy20150621]
- Taishan Scholars of Shandong Province
Potato (Solanum tuberosum L.) is a major crop worldwide that meets human economic and nutritional requirements. Potato has several advantages over other crops: easy to cultivate and store, cheap to consume, and rich in a variety of secondary metabolites. In this study, we generated three marker-free transgenic potato lines that expressed the Arabidopsis thaliana flavonol-specific transcriptional activator AtMYBI2 driven by the tuber-specific promoter Patatin. Marker-free potato tubers displayed increased amounts of caffeoylquinic acids (CQAs) (3.35-fold increases on average) and flavonols (4.50-fold increase on average). Concentrations of these metabolites were associated with the enhanced expression of genes in the CQA and flavonol biosynthesis pathways. Accumulation of CQAs and flavonols resulted in 2-fold higher antioxidant capacity compared to wild-type potatoes. Tubers from these marker -free transgenic potatoes have therefore improved antioxidant properties.
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