Temporal change of photophobic step-up responses of Euglena gracilis investigated through motion analysis.

ABSTRACT: The adaptation to a strong light is one of the essential characteristics of green algae, yet lacking relatively the information about the photophobic responses of Eukaryotic microalgae. We investigated the photophobic step-up responses of Euglena gracilis over a time course of several hours with alternated repetition of blue-light pulse illumination and spatially patterned blue-light illumination. Four distinctive photophobic motions in response to strong blue light were identified in a trace image analysis, namely on-site rotation, running and tumbling, continuous circular swimming, and unaffected straightforward swimming. The cells cultured in autotrophic conditions under weak light showed mainly the on-site rotation response at the beginning of blue-light illumination, but they acquired

SUBMITTER: Ozasa K 

PROVIDER: S-EPMC5325543 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature