荞麦黄酮及其生物合成调控研究进展.

Fagopyrum plant is rich in resources and contained a large number of flavonoid compounds. Research history and the research hotspots of buckwheat flavonoids were summarized by literature retrieval in this study. As it was revealed, the research paper about buckwheat flavonoids was firstly published in 1952. From 1952 to 1999, the number of publishing papers was less than 10 papers per year, and the research on buckwheat flavonoids was in its infancy. Since the year of 2000, buckwheat flavonoids have gradually gained more attentions from researchers, and the numbers of publishing papers have been increased annually. In the past two decades, researches conducting buckwheat flavonoids studies mainly focused on the fields of botany, food science and technology, agriculture, and biochemistry and molecular biology. Articles referring to the antioxidant activity of buckwheat flavonoids got high citations, and the biological activities and nutritional functions of buckwheat flavonoids attracted much attention. By now, 80 flavonoid compounds have been identified from Fagopyrum. Of them, quercetin, kaempferol, luteolin, rhamnetin, isorhamnetin, tricin, naringenin, myricetin, apigenin and hesperetin were the common feature flavonoid aglycones from buckwheat. Peonidin, delphinidin and cyanidin were the anthocyanins compounds which were mostly isolated from Fagopyrum. Biosynthesis of buckwheat flavonoids originated from the phenylpropane metabolism pathway, and the key enzymes genes involved in the pathway, such as PAL, CHS, C4H, 4CL, CHI, LAR etc., and the transcription factor MYB genes were cloned and identified. MYB transcription factors played an important role in the induction and regulation of flavonoid biosynthesis, and major influence factors for the flavonoids biosynthesis included the environment factors, plant growth regulators, biological factors and varieties, and these factors could have cross regulations effects on the buckwheat flavonoids biosynthesis. In this paper, research overviews of buckwheat flavonoids, flavonoid compounds, flavonoids biosynthesis pathway, mechanism of regulation, and major influence factors are summarized, which can lay a theoretical foundation and a feasible scheme for high quality of buckwheat production during the cultivation process, and promotion of nutritional values of buckwheat products, and point out the research direction of buckwheat flavonoids in the future. [ABSTRACT FROM AUTHOR]