Heterologous transformation of <i>Camelina sativa</i> with high-speed chimeric myosin XI-2 promotes plant growth and leads to increased seed yield

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  • Duan Zhongrui
    Faculty of Education and Integrated Arts and Sciences, Waseda University
  • Ito Kohji
    Department of Biology, Graduate School of Science, Chiba University
  • Tominaga Motoki
    Faculty of Education and Integrated Arts and Sciences, Waseda University Major in Integrative Bioscience and Biomedical Engineering, Graduate School of Science and Engineering, Waseda University

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  • Heterologous transformation of Camelina sativa with high-speed chimeric myosin ⅩⅠ-2 promotes plant growth and leads to increased seed yield

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<p>Camelina sativa is a Brassicaceae oilseed plant used as a biotechnology platform for biofuel and healthy vegetable oil. As Camelina is closely related to the model plant Arabidopsis, the genetic tools of Arabidopsis are considered useful when applied to Camelina. Myosin XI-2 is one of the major motive forces driving cytoplasmic streaming in Arabidopsis. In our previous study, high-speed chimeric myosin XI-2, a myosin XI-2 artificially modified by genetically exchanging the motor domain of Arabidopsis myosin XI-2 with the faster Chara myosin XI, was shown to accelerate cytoplasmic streaming and promote plant growth in Arabidopsis. Here, we heterologously transformed this high-speed Chara-Arabidopsis chimeric myosin XI-2 gene in Camelina. The transgenic plants exhibited not only enhancement of leaf development and main stem elongation but also early flowering and seed setting, indicating that the high-speed chimeric myosin XI-2 can improve plant growth in Camelina. Interestingly, total seed yield was significantly increased in the transgenic plants as the total seed number increased. Our results suggest that the high-speed myosin XI system might also be effective to improve the growth of other closely related plant species.</p>

Journal

  • Plant Biotechnology

    Plant Biotechnology 37 (3), 253-259, 2020-09-25

    Japanese Society for Plant Biotechnology

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