Improved translation efficiency in chrysanthemum and torenia with a translational enhancer derived from the tobacco alcohol dehydrogenase gene

  • Aida Ryutaro
    National Institute of Floricultural Science, National Agriculture and Food Research Organization
  • Narumi Takako
    National Institute of Floricultural Science, National Agriculture and Food Research Organization
  • Ohtsubo Norihiro
    National Institute of Floricultural Science, National Agriculture and Food Research Organization
  • Yamaguchi Hiroyasu
    National Institute of Floricultural Science, National Agriculture and Food Research Organization
  • Kato Ko
    Nara Institute of Science and Technology
  • Shinmyo Atsuhiko
    Nara Institute of Science and Technology
  • Shibata Michio
    National Institute of Floricultural Science, National Agriculture and Food Research Organization

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We investigated the efficiency of the 5′-untranslated region (UTR) of the tobacco alcohol dehydrogenase gene (NtADH-5′UTR) as a translational enhancer in chrysanthemum (Chrysanthemum morifolium) and torenia (Torenia fournieri). Three constructs were introduced: control, “ADH−,” cauliflower mosaic virus 35S RNA (CaMV 35S) promoter::β-glucuronidase (GUS); NtADH-5′UTR with a spacer, “ADH+S,” CaMV 35S promoter::NtADH-5′UTR::25-bp spacer::GUS; and NtADH-5′UTR with no spacer, “ADH+,” CaMV 35S promoter::NtADH-5′UTR::GUS. The highest GUS activity in ADH+S and ADH+ for chrysanthemum was about 45 and 190 times, respectively, and for torenia was 12 and 22 times, respectively, than that for the ADH− plants. NtADH-5′UTR enhanced translational efficiency in both species. With the lowest translational efficiency set to 1, the relative translational efficiencies were 1 to 15 (ADH−), 47 to 568 (ADH+S), and 267 to 1360 (ADH+) for chrysanthemum, and 1 to 3 (ADH−), 47 to 114 (ADH+S), and 85 to 226 (ADH+) for torenia. NtADH-5′UTR would facilitate practical breeding and fundamental genetic research in chrysanthemum and torenia.

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