title: Florigen is involved in axillary bud development at multiple stages in Arabidopsis.
abstract: The wide variety of plant architectures is largely based on diverse and flexible modes of axillary shoot development. In Arabidopsis, floral transition (flowering) stimulates axillary bud development. The mechanism that links flowering and axillary bud development is, however, largely unknown. We recently showed that FLOWERING LOCUS T (FT) protein, which acts as florigen, promotes the phase transition of axillary meristems, whereas BRANCHED1 (BRC1) antagonizes the florigen action in axillary buds. Here, we present evidences for another possible role of florigen in axillary bud development. Ectopic overexpression of FT or another florigen gene TWIN SISTER OF FT (TSF) with LEAFY (LFY) induces ectopic buds at cotyledonary axils, confirming the previous proposal that these genes are involved in formation of axillary buds. Taken together with our previous report that florigen promotes axillary shoot elongation, we propose that florigen regulates axillary bud development at multiple stages to coordinate it with flowering in Arabidopsis.
authors.affiliation: Division of Integrated Life Science; Graduate School of Biostudies; Kyoto University; Yoshida-Konoe-cho; Sakyo-ku, Kyoto Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Niwa
authors.affiliation: Division of Integrated Life Science; Graduate School of Biostudies; Kyoto University; Yoshida-Konoe-cho; Sakyo-ku, Kyoto Japan.
authors.forename: Motomu
authors.initials: M
authors.lastname: Endo
authors.affiliation: Division of Integrated Life Science; Graduate School of Biostudies; Kyoto University; Yoshida-Konoe-cho; Sakyo-ku, Kyoto Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Araki
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000254:growth & development*; D018548:Cotyledon / Q000254:growth & development / Q000378:metabolism; D060405:Florigen / Q000378:metabolism*; D035264:Flowers / Q000254:growth & development* / Q000378:metabolism*; D030821:Plants, Genetically Modified
chemical_list: D060405:Florigen
keywords: Arabidopsis; BRC1; FT; LFY; TSF; axillary bud; cotyledon; florigen; flowering