TY - JOUR
TI - Photoresponse in the Ciliated Protozoan Colpoda cucullus
AU - Kawano, Noriyuki
AU - Funadani, Ryoji
AU - Arikawa, Mikihiko
AU - Harada, Tetsuo
AU - Suizu, Futoshi
AU - Matsuoka, Kou
AU - Matsuoka, Tatsuomi
TI - Photoresponse in the Ciliated Protozoan Colpoda cucullus
AB - We found that vegetative cells of Colpoda cucullus Nag-1 accumulated in shaded areas of a container when grown in the laboratory and then formed resting cysts. The photodispersal (negative photoaccumulation) of C. cucullus was mediated, at least in part, by a difference in forward swimming velocity between the illuminated region and the shaded area of the Petri dish (motion slowed or stopped in the shaded area). When C. cucullus was stimulated by continuous light irradiation, the forward swimming velocity increased and reached a steady state within 10 s. When the light intensity decreased, the forward swimming velocity gradually decreased, and eventually returned to its original level for approximately 1 min. The action spectrum of the photokinetic response (steady-state swimming acceleration driven by continuous light stimulation) implies the involvement of blue light receptors.
VL - 2017
IS - Volume 56, Issue 1
PY - 2017
SN - 0065-1583
C1 - 1689-0027
SP - 1
EP - 7
DO - 10.4467/16890027AP.17.001.6965
UR - https://ejournals.eu/en/journal/acta-protozoologica/article/photoresponse-in-the-ciliated-protozoan-colpoda-cucullus
KW - Colpoda
KW - resting cyst
KW - photodispersal
KW - photokinetic response
KW - action spectrum