Chlamydomonas graphy (Kenichi Wakabayashi, Laboratory for Chemistry and life science, Tokyo Institute of Technology)

The Biophysical Society of Japan annual meeting executive committee 2019

The culture solution of green algae Chlamydomonas was placed in a square dish, and a membrane-permeable reactive oxygen species reagent that induces positive phototaxis was added. This was placed on the light box, and an OHP sheet with white letters “BIOPHYSICS” was written under the dish. After standing for about 3 minutes, the cells gathered clearly at the character. After about 4 minutes from pulling out the sheet, it diffuses and the characters become invisible. This video is the reverse playback of the last 4 minutes at 20x speed. It is possible to draw using Chlamydomonas' accurate light source recognition and rapid light mobility. Camera: SONY Cyber-shot DSC-RX100M2




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