Journal
ANALYTICAL METHODS
Volume 9, Issue 5, Pages 792-802Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ay02970a
Keywords
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Funding
- National Key Research and Development Program of China [2016YFD0300209]
- National Natural Science Foundation of China [31301277, 31401329]
- China Postdoctoral Science Foundation [2014M560724]
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Metabolite profiling of isoflavones and anthocyanins in black soybean seeds (BSSs) collected from different geographical locations in Southwest China was performed. A more rapid and convenient method was established to identify and quantify twelve isoflavones and eight anthocyanins in BSSs by HPLC-MS analyses. The results indicated that beta-glucoside (G-type) and malonylglucoside (M-type) derivatives, cyanidin-3-glucoside (CYL) and peonidin-3-glucoside (PEO) are the major compounds found predominantly in the isoflavones and anthocyanins of BSSs. Combined with geographical data and orthogonal partial least-squares discriminant analysis (OPLS-DA), it was demonstrated that higher isoflavone contents were found in the samples grown in the high-longitude areas of Guizhou and Chongqing, while higher anthocyanin contents were found in the samples grown in the high-latitude areas of Chongqing and Sichuan. Geographical location affected the accumulation of secondary metabolites involved in the phenylpropane pathway, especially in the trade-off/balance between isoflavone and anthocyanin biosynthesis in BSSs. Overall, a high-latitude environment has beneficial effects on the metabolism of the phenylpropane pathway, and a high-longitude environment can promote isoflavone biosynthesis, while a low-longitude environment is favorable for anthocyanin biosynthesis in BSSs.
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