Cytoplasmic streaming is active transport occurring in various plant cells. We artificially controlled cytoplasmic streaming velocity by replacing the motor domains of myosin XI, the motive force for cytoplasmic streaming, with those of the fastest Chara myosin XI and slower Human myosin V. The plant sizes of the transgenic Arabidopsis expressing high and low-speed chimeric myosin XI were larger and smaller, respectively. Because cytoplasmic streaming is a common system for intracellular transport in plants, our system could have applications in artificial size control in plants.
Research Area : "Creation of Basic Technology for Improved Bioenergy Production through Functional Analysis and Regulation of Algae and Other Aquatic Microorganisms"
Research Theme : " Development of plant growth promoting system using the fastest motor Chara myosin"
Motoki Tominaga, Atsushi Kimura, Etsuo Yokota, Takeshi Haraguchi, Teruo Shimmen, Keiichi Yamamoto, Akihiko Nakano, and Kohji Ito
“Cytoplasmic Streaming Velocity as a Plant Size Determinant”
Developmental Cell, Published online 11th November 2013
Motoki Tominaga, Ph.D.
Senior Research Scientist, Live Cell Molecular Imaging Research Team, RIKEN Center for Advanced Photonics
Masashi Furukawa, Fumiharu Kimura,
Green Science Group, Department of Innovation Research, JST