Flowering and expression of flowering-related genes under long-day conditions with light-emitting diodes

Yoshimi Hori, Koji Nishidate, Manabu Nishiyama, Koki Kanahama, Yoshinori Kanayama

Research output: Contribution to journalArticle

21 Citations (Scopus)

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. paniculataGpFT1 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. paniculataGpSOC1 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.

Original languageEnglish
Pages (from-to)321-330
Number of pages10
JournalPlanta
Volume234
Issue number2
DOIs
Publication statusPublished - 2011 Aug 1

Keywords

  • Arabidopsis
  • Blue light
  • Far-red light
  • Flowering
  • Gypsophila

ASJC Scopus subject areas

  • Genetics
  • Plant Science

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