Park Soo-Yun, Lee So Young, Yang Jung Wook, Lee Joon-Seol, Oh Sung-Dug, Oh Seonwoo, Lee Si Myung, Lim Myung-Ho, Park Soon Ki, Jang Jae-Seon, Cho Hyun Suk, Yeo Yunsoo
1National Academy of Agricultural Science, Rural Development Administration, Jeonju, Jeonbuk, 54874 Korea.
2Bioenergy Crop Research Institute, Rural Development Administration, Muan, Jeonnam, 58545 Korea.
Food Sci Biotechnol. 2016 Feb 29;25(1):283-291. doi: 10.1007/s10068-016-0041-7. eCollection 2016.
We determined the phytochemical diversity, including carotenoids, flavonoids, anthocyanins, and phenolic acids, in sweet potatoes ( L.) with distinctive flesh colors (white, orange, and purple) and identified hydrophilic primary metabolites. Carotenoid content was considerably higher in orange-fleshed sweet potatoes, wherein β-carotene was the most plentiful, and anthocyanins were detected only in purple-fleshed sweet potatoes. The levels of phenolic acids and flavonoids were relatively higher in purple-fleshed sweet potatoes than those in the other two varieties. Forty-one primary and 18 secondary metabolite profiles were subjected to multivariate statistical analyses, which fully distinguished among the varieties and separated orange- and purple-fleshed sweet potatoes from white-fleshed sweet potatoes based on the high levels of sugars, sugar alcohols, and secondary metabolites. This is the first study to determine comprehensive metabolic differences among different color-fleshed sweet potatoes and provides useful information for genetic manipulation of sweet potatoes to influence primary and secondary metabolism.
我们测定了具有独特果肉颜色（白色、橙色和紫色）的甘薯（Ipomoea batatas (L.)）中的植物化学多样性，包括类胡萝卜素、黄酮类化合物、花青素和酚酸，并鉴定了亲水性初级代谢产物。橙色果肉甘薯中的类胡萝卜素含量相当高，其中β-胡萝卜素最为丰富，而花青素仅在紫色果肉甘薯中检测到。紫色果肉甘薯中酚酸和黄酮类化合物的含量相对高于其他两个品种。对41种初级和18种次级代谢产物谱进行了多元统计分析，这些分析能够完全区分不同品种，并根据糖、糖醇和次级代谢产物的高含量将橙色和紫色果肉甘薯与白色果肉甘薯区分开来。这是第一项确定不同颜色果肉甘薯之间综合代谢差异的研究，并为甘薯的遗传操作以影响初级和次级代谢提供了有用信息。
