Diurnal expression of CONSTANS-like genes is independent of the function of cycling DOF factor (CDF)-like transcriptional repressors in Physcomitrella patens

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  • Ishida Tetsuya
    Biotechnology Research Center, The University of Tokyo
  • Sugiyama Takumi
    Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • Tabei Nobumitsu
    Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • Yanagisawa Shuichi
    Biotechnology Research Center, The University of Tokyo Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo

書誌事項

タイトル別名
  • Diurnal expression of <i>CONSTANS-like</i> genes is independent of the function of cycling DOF factor (CDF)-like transcriptional repressors in <i>Physcomitrella patens</i>
公開日
2014
DOI
  • 10.5511/plantbiotechnology.14.0821a
公開者
日本植物バイオテクノロジー学会

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説明

The Dof-type transcriptional repressors CYCLING DOF FACTORS (CDFs) directly suppress the expression of CONSTANS (CO), which encodes a key regulator of photoperiodic gene expression, day-length perception and the floral transition in Arabidopsis thaliana. The genes encoding CDF-like (PpDof3 and PpDof4) and CO-like (PpCOL1-PpCOL3) proteins are present in the genome of the moss Physcomitrella patens, although P. patens lacks the genes encoding homologues of FLAVIN-BINDING KELCH REPEAT F-BOX1 (FKF1) and GIGANTEA (GI), which control the stability of CDFs in A. thaliana. In the current study, we investigated whether the functions of PpDof3 and PpDof4 are associated with the expression of PpCOL1-PpCOL3 in P. patens. We found that the diurnal expression patterns of PpDof3 and PpDof4 are similar to those of CDF genes and that like CDF1 from A. thaliana, PpDof3 and PpDof4 function as transcriptional repressors. However, targeted disruptions of PpDof3 and PpDof4 did not affect the expression of PpCOL1-PpCOL3, indicating that the expression of COLs is independent of the functions of PpDof3 and PpDof4 in P. patens.

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