本村泰三 教授 / MOTOMURA, Taizo

秩序を維持する細胞構造

本村泰三 教授 /  MOTOMURA, Taizo

研究分野・テーマ・内容

研究分野 藻類学
研究テーマ 藻類細胞の微細構造、特に核とオルガネラの協調性

研究内容

藻類は生物における細胞進化、そして今後さらに苦慮される環境問題を考える上で避けては通れない重要な生物群です。また、フィールド・実験室内において観察できる藻類の持つユニークな生物現象には驚かされることが多々あります。海洋生物の研究には臨海実験所が最も適しています。私は様々な藻類、また生活環で現れる特徴的な細胞の微細構造に焦点を当て、特に電子顕微鏡による観察を主要な研究手段として、核とオルガネラに見られる協調関係を明らかにすることを目的に研究しています。

メッセージ

臨海実験所というメインキャンパスから離れた孤立した場所で、波の音を聞きながら研究を進めていくことはすごく楽しいものです。生き物の研究を進める上に、それらが生活しているフィールドのそばで、自分たちも同じように生活をしながら研究を進められるのは幸せなことだと思っています。

参考文献・論文・著書

nameMOTOMURA Taizo

Research subject

Specialized field

Cell Biology of Algae

Key words

・Brown algae
・Life cycle regulation
・Flagellar structures in heterokont algae
・Sexual reproduction and development in algae

Research subject

Studying algae is crucially important, this is because 1) algae are key organisms when considering the evolution of life, and 2) they are unavoidable ones when considering environmental problems in near feature. If we were marine animals, we could find that color of photosynthetic plants are yellow, not green. Namely, primary producers in oceans are yellow plants which had got chloroplasts by the secondary endosymbiosis. Our laboratory, Muroran Marine Station facing Uchiura Bay – the Pacific Ocean, is now studying the biology of brown algae, e.g. fertilization (isogamy, anisogamy, oogamy), zygote development, mitosis and cytokinesis, cellular organelles (chloroplasts, mitochondria, flagella etc.), life cycle regulation from view points of culture experiments, electron microscopy and molecular analysis. Brown algae are only one group which had got an elaborated multicellularity among a supergroup “Stramenopile”, and the most important primary producer in coastal seas. In 2010, the whole genome sequence of the model brown alga, Ectocarpus siliculosus, had become clarified. We are now really standing at the beginning of new age of brown algal studies.

 

message

We are studying in Muroran Marine Station (from 1933), at where is very quiet facing sea shore. In 2012, new building with nice accommodation will be built up. It is quite comfortable to study seaweeds with listening to sounds of waves and sea gulls far from a noisy big city.

references

  • Katsaros, C., Nagasato, C., Terauchi, M. and Motomura, T. (2011) Cytokinesis of brown algae. In Advances in Algal Cell Biology (Eds. Heimann, K. and Katsaros, C.). Walter de Gruyter.
  • Cock, M. J., et al. (2010) The Ectocarpus genome and the independent evolution of multicellularity in the brown algae. Nature, 465, 617-621.
  • Motomura, T., Nagasato, C. and Kimura, K. (2010) Cytoplasmic inheritance of organelles in brown algae. Journal of Plant Research, 123, 185-192.