Species name： Euglena gracilis
Pharmaceutical Sciences, Toho University Mineo Iseki
Immediately after a rapid change in incident blue light intensity, Euglena cell alters its swimming direction. This behavior is known as photophobic response. Step-up and step-down photophobic responses can be observed when a rapid increase or decrease in incident blue light intensity, respectively, is experienced by the cell.
seki, M., et. al. A blue-light-activated adenylyl cyclase mediates photoavoidance in Euglena gracilis. Nature 415,1047-1051 (2002).
Matsunaga, S., et al. Discovery of signaling effect of UV-B/C light in the extended UV-A/blue-type action spectra for step-down and step-up photophobic responses in the unicellular flagellate alga Euglena gracilis. Protoplasma 201, 45-52 (1998).
(2014.01.23)