title: Isolation and characterization of FLOWERING LOCUS T subforms and APETALA1 of the subtropical fruit tree Dimocarpus longan.
abstract: Longan (Dimocarpus longan Lour.) is a subtropical evergreen fruit tree, mainly cultivated in Asia. Two putative floral integrator genes, D. longan FLOWERING LOCUS T1 and 2 (DlFT1 and DlFT2) were isolated and both translated sequences revealed a high homology to FT sequences from other plants. Moreover, two APETALA1-like (DlAP1-1 and DlAP1-2) sequences from longan were isolated and characterized. Results indicate that the sequences of these genes are highly conserved, suggesting functions in the longan flowering pathway. Ectopic expression of the longan genes in arabidopsis resulted in different flowering time phenotypes of transgenic plants. Expression experiments reveal a different action of the longan FT genes and indicate that DlFT1 is a flowering promoter, while DlFT2 acts as flowering inhibitor. Overexpression of longan AP1 genes in transgenic arabidopsis results in a range of flowering time phenotypes also including early and late flowering individuals.
authors: Institute of Crop Science, Section Crop Physiology of Specialty Crops, Hohenheim University, Stuttgart, Germany. Electronic address: p.winterhagen@uni-hohenheim.de.
authors: Patrick
authors: P
authors: Winterhagen
authors: Pimsiri
authors: P
authors: Tiyayon
authors: Alon
authors: A
authors: Samach
authors: Martin
authors: M
authors: Hegele
authors: Jens N
authors: JN
authors: Wünsche
mesh_terms: D005638:Fruit / Q000235:genetics / Q000378:metabolism*; D018506:Gene Expression Regulation, Plant; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D030821:Plants, Genetically Modified / Q000235:genetics / Q000378:metabolism*; D029631:Sapindaceae / Q000378:metabolism*; D014197:Trees / Q000235:genetics / Q000378:metabolism*
chemical_list: D010940:Plant Proteins
keywords: AP1; AP3; APETALA1; APETALA3; FLOWERING LOCUS T; FT; Flowering promoter; Flowering repressor; Flowering time control; TERMINAL FLOWER1; TFL1; Transcription factor; WT; Wild type