title: Flowering and expression of flowering-related genes under long-day conditions with light-emitting diodes.
abstract: The effects of light quality on flowering time were investigated in Gypsophila paniculata, which is a long-day cut flower, and with Arabidopsis under long-day conditions with light-emitting diodes (LEDs). Gypsophila paniculata plants were grown under natural daylight and flowering was controlled by long-day treatment with a weak LED light of a single color in the night. Flowering was promoted not by blue light, but by far-red light in G. paniculata, while flowering was promoted by both light colors in Arabidopsis. FT homologs of G. paniculata GpFT1 and GpFT2 were differentially expressed under long-day conditions with white light, suggesting that they play roles in flowering at different stages of reproductive development. GpFTs and FT gene expression was not induced by far-red light in G. paniculata or Arabidopsis. Instead, the expression of the SOC1 homolog of G. paniculata GpSOC1 and SOC1 was induced by far-red light in G. paniculata and Arabidopsis. Flowering was promoted by induction of FT and SOC1 expression with blue light in Arabidopsis, whereas GpFTs and GpSOC1 expression was low with blue light induction in G. paniculata. The relationship between flowering and the expression of FT and SOC1 in Arabidopsis was confirmed with ft and soc1 mutants. These results suggest that long-day conditions with far-red light promote flowering through SOC1 and its homologs, while the conditions with blue light do not promote flowering in G. paniculata, because of low expression of GpFTs and GpSOC1 in contrast to that in Arabidopsis.
authors: Graduate School of Agricultural Science, Tohoku University, 1-1 Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai, 981-8555, Japan.
authors: Yoshimi
authors: Y
authors: Hori
authors: Koji
authors: K
authors: Nishidate
authors: Manabu
authors: M
authors: Nishiyama
authors: Koki
authors: K
authors: Kanahama
authors: Yoshinori
authors: Y
authors: Kanayama
mesh_terms: D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000235:genetics / Q000502:physiology* / Q000528:radiation effects; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000528:radiation effects; D029748:Caryophyllaceae / Q000235:genetics / Q000502:physiology* / Q000528:radiation effects; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D035264:Flowers / Q000235:genetics / Q000502:physiology / Q000528:radiation effects; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant / Q000528:radiation effects*; D017343:Genes, Plant / Q000235:genetics; D008027:Light; D008029:Lighting; D026161:MADS Domain Proteins / Q000235:genetics* / Q000528:radiation effects; D008969:Molecular Sequence Data; D009154:Mutation; D017440:Photoperiod; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics* / Q000528:radiation effects; D030821:Plants, Genetically Modified; D016415:Sequence Alignment; D013997:Time Factors
chemical_list: C419046:AGL20 protein, Arabidopsis; D029681:Arabidopsis Proteins; D018076:DNA, Complementary; C418905:FT protein, Arabidopsis; D026161:MADS Domain Proteins; D010940:Plant Proteins