Anthocyanin Accumulation in the Leaves of the Purple Sweet Potato (<i>Ipomoea batatas</i> L.) Cultivars
GuoLiang Li,
Zhaomiao Lin,
Hong Zhang,
Zhonghua Liu,
Yongqing Xu,
Guochun Xu,
Huawei Li,
Rongchang Ji,
Wenbin Luo,
Yongxiang Qiu,
Sixin Qiu,
Hao Tang
Affiliations
GuoLiang Li
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Zhaomiao Lin
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Hong Zhang
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Zhonghua Liu
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Yongqing Xu
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Guochun Xu
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Huawei Li
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Rongchang Ji
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Wenbin Luo
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Yongxiang Qiu
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Sixin Qiu
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Hao Tang
Institute of Crop Sciences, Fujian Academy of Agricultural Sciences, Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agriculture. Fuzhou, Fujian 350013, China
Sweet potato anthocyanins are water-soluble pigments with many physiological functions. Previous research on anthocyanin accumulation in sweet potato has focused on the roots, but the accumulation progress in the leaves is still unclear. Two purple sweet potato cultivars (Fushu No. 23 and Fushu No. 317) with large quantities of anthocyanin in the leaves were investigated. Anthocyanin composition and content were assessed with ultra-performance liquid chromatography diode-array detection (UPLC-DAD) and ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS), and the expressions of genes were detected by qRT-PCR. The two cultivars contained nine cyanidin anthocyanins and nine peonidin anthocyanins with an acylation modification. The acylation modification of anthocyanins in sweet potato leaves primarily included caffeoyl, p-coumaryl, feruloyl, and p-hydroxy benzoyl. We identified three anthocyanin compounds in sweet potato leaves for the first time: cyanidin 3-p-coumarylsophoroside-5-glucoside, peonidin 3-p-coumarylsophoroside-5-glucoside, and cyanidin 3-caffeoyl-p-coumarylsophoroside-5-glucoside. The anthocyanidin biosynthesis downstream structural genes DFR4, F3H1, anthocyanin synthase (ANS), and UDP-glucose flavonoid 3-O-glucosyltransferase (UFGT3), as well as the transcription factor MYB1, were found to be vital regulatory genes during the accumulation of anthocyanins in sweet potato leaves. The composition of anthocyanins (nine cyanidin-based anthocyanins and nine peonidin-based anthocyanins) in all sweet potato leaves were the same, but the quantity of anthocyanins in leaves of sweet potato varied by cultivar and differed from anthocyanin levels in the roots of sweet potatoes. The anthocyanidin biosynthesis structural genes and transcription factor together regulated and controlled the anthocyandin biosynthesis in sweet potato leaves.
