title: CmFTL2is involved in the photoperiod- and sucrose-mediated control of flowering time in chrysanthemum.
abstract: The chrysanthemum genome harbors threeFT-likegenes:CmFTL1andCmFTL3are thought to act as regulators of floral induction under long-day (LD) and short-day (SD) conditions, respectively, whereas the function ofCmFTL2is currently unclear. The objective of the present research was to explore the function ofCmFTL2in the determination of flowering time of the photo-insensitive chrysanthemum cultivar 'Floral Yuuka', both in response to variation in the photoperiod and to the exogenous provision of sucrose. Spraying leaves of 'Floral Yuuka' plants with 50 mM sucrose accelerated flowering and increased the level ofCmFTL2transcription in the leaf more strongly than eitherCmFTL1orFTL3under both long and SD conditions. Transcription profiling indicated that all threeCmFTLgenes were upregulated during floral induction. The relationship of theCmFTL2sequence with that of other members of thePEBPfamily suggested that its product contributes to the florigen rather than to the anti-florigen complex. The heterologous expression ofCmFTL2in theArabidopsis thaliana ft-10mutant rescued the mutant phenotype, showing thatCmFTL2could compensate for the absence ofFT. These results suggest thatCmFTL2acts as a regulator of floral transition and responds to both the photoperiod and sucrose.
authors.affiliation: College of Horticulture, Nanjing Agricultural University , Nanjing 210095, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Sun
authors.affiliation: College of Horticulture, Nanjing Agricultural University , Nanjing 210095, China.
authors.forename: Heng
authors.initials: H
authors.lastname: Wang
authors.affiliation: College of Horticulture, Nanjing Agricultural University , Nanjing 210095, China.
authors.forename: Liping
authors.initials: L
authors.lastname: Ren
authors.affiliation: College of Horticulture, Nanjing Agricultural University , Nanjing 210095, China.
authors.forename: Sumei
authors.initials: S
authors.lastname: Chen
authors.affiliation: College of Horticulture, Nanjing Agricultural University , Nanjing 210095, China.
authors.forename: Fadi
authors.initials: F
authors.lastname: Chen
authors.affiliation: College of Horticulture, Nanjing Agricultural University , Nanjing 210095, China.
authors.forename: Jiafu
authors.initials: J
authors.lastname: Jiang