title: 3',5'-Di-C-beta-glucopyranosylphloretin, a flavonoid characteristic of the genus Fortunella.
abstract: Dihydrochalcone derivative, 3',5'-di-C-beta-glucopyranosylphloretin (1), is present in the genus Fortunella, (F. crassifolia, F. japonica, F. margarita, F. polyandra and F. hindsii). These species accumulate a large quantity of 1 in their fruits (peel, 6.5-15.2 mg/g in dry wt; juice sac, 1.5-10.5 mg/g) and in their leaves (21.3-60.2 mg/g). Twenty-seven Tanaka's Citrus species examined lack 1, but C. madurensis and C. halimii contain 1 in large quantities in their peels (25.1 and 33.6 mg/g) and juice sacs (4.1 and 4.2 mg/g). Poncirus species do not contain 1. Fortunella-citrus hybrids, the Orangequat [C. unshiuxF. crassifolia], the Thomasville citrangequat [Fortunella sp.x(C. sinensisxPoncirus trifoliata)], and seven hybrid progenies [F. margaritaxC. junos], contain large amounts of 1 in their peels (17.0-7.9 mg/g) and juice sacs (2.0-9.9 mg/g). These facts suggest that accumulation of 1 is a generic trait of the genus Fortunella and that the inheritance of the trait among the intergeneric hybrids is controlled by a dominant allele. Thus C. madurensis and C. halimii are thought to originate from natural hybrids between the genera Citrus and Fortunella. Phloridzin, which has the same aglycon as 1, was not detected in the citrus plants examined.
authors.affiliation: Okinawa Subtropical Station, Japan International Research Center for Agricultural Science, Ministry of Agriculture, Forestry, and Fishery, 1091-1, Maezato, Ishigaki, Okinawa 907-0002, Japan. kazunori@affrc.go.jp
authors.forename: K
authors.initials: K
authors.lastname: Ogawa
authors.forename: A
authors.initials: A
authors.lastname: Kawasaki
authors.forename: M
authors.initials: M
authors.lastname: Omura
authors.forename: T
authors.initials: T
authors.lastname: Yoshida
authors.forename: Y
authors.initials: Y
authors.lastname: Ikoma
authors.forename: M
authors.initials: M
authors.lastname: Yano
mesh_terms: D005419:Flavonoids / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D019685:Rosales / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: C432875:3',5'-di-C-glucopyranosylphloretin; D005419:Flavonoids