title: Unraveling the mechanism underlying the glycosylation and methylation of anthocyanins in peach.
abstract: Modification of anthocyanin plays an important role in increasing its stability in plants. Here, six anthocyanins were identified in peach (Prunus persica), and their structural diversity is attributed to glycosylation and methylation. Interestingly, peach is quite similar to the wild species Prunus ferganensis but differs from both Prunus davidiana and Prunus kansueasis in terms of anthocyanin composition in flowers. This indicates that peach is probably domesticated from P. ferganensis. Subsequently, genes responsible for both methylation and glycosylation of anthocyanins were identified, and their spatiotemporal expression results in different patterns of anthocyanin accumulation in flowers, leaves, and fruits. Two tandem-duplicated genes encoding flavonoid 3-O-glycosyltransferase (F3GT) in peach, PpUGT78A1 and PpUGT78A2, showed different activity toward anthocyanin, providing an example of divergent evolution of F3GT genes in plants. Two genes encoding anthocyanin O-methyltransferase (AOMT), PpAOMT1 and PpAOMT2, are expressed in leaves and flowers, but only PpAOMT2 is responsible for the O-methylation of anthocyanins at the 3' position in peach. In addition, our study reveals a novel branch of UGT78 genes in plants that lack the highly conserved intron 2 of the UGT gene family, with a great variation of the amino acid residue at position 22 of the plant secondary product glycosyltransferase box. Our results not only provide insights into the mechanisms underlying anthocyanin glycosylation and methylation in peach but will also aid in future attempts to manipulate flavonoid biosynthesis in peach as well as in other plants.
authors.affiliation: Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan 430074, People's Republic of China (J.C., G.W., H.Z., C.G., S.V., L.L., Y.H.); andGraduate University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China (J.C., G.W., H.Z.).
authors.forename: Jun
authors.initials: J
authors.lastname: Cheng
authors.affiliation: Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan 430074, People's Republic of China (J.C., G.W., H.Z., C.G., S.V., L.L., Y.H.); andGraduate University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China (J.C., G.W., H.Z.).
authors.forename: Guochao
authors.initials: G
authors.lastname: Wei
authors.affiliation: Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan 430074, People's Republic of China (J.C., G.W., H.Z., C.G., S.V., L.L., Y.H.); andGraduate University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China (J.C., G.W., H.Z.).
authors.forename: Hui
authors.initials: H
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan 430074, People's Republic of China (J.C., G.W., H.Z., C.G., S.V., L.L., Y.H.); andGraduate University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China (J.C., G.W., H.Z.).
authors.forename: Chao
authors.initials: C
authors.lastname: Gu
authors.affiliation: Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan 430074, People's Republic of China (J.C., G.W., H.Z., C.G., S.V., L.L., Y.H.); andGraduate University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China (J.C., G.W., H.Z.).
authors.forename: Sornkanok
authors.initials: S
authors.lastname: Vimolmangkang
authors.affiliation: Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan 430074, People's Republic of China (J.C., G.W., H.Z., C.G., S.V., L.L., Y.H.); andGraduate University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China (J.C., G.W., H.Z.).
authors.forename: Liao
authors.initials: L
authors.lastname: Liao
authors.affiliation: Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan 430074, People's Republic of China (J.C., G.W., H.Z., C.G., S.V., L.L., Y.H.); andGraduate University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China (J.C., G.W., H.Z.) yphan@wbgcas.cn.
authors.forename: Yuepeng
authors.initials: Y
authors.lastname: Han
mesh_terms: D000872:Anthocyanins / Q000378:metabolism*; D020869:Gene Expression Profiling; D018745:Genome, Plant; D014453:Glucuronosyltransferase / Q000235:genetics; D006031:Glycosylation; D008745:Methylation; D008780:Methyltransferases / Q000235:genetics; D010802:Phylogeny; D027861:Prunus / Q000235:genetics / Q000378:metabolism*
chemical_list: D000872:Anthocyanins; D008780:Methyltransferases; D014453:Glucuronosyltransferase
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