Long-time behavior of swimming Euglena gracilis in a heterogenous light environment

被引:4
|
作者
Muku, Kazuki [1 ]
Yamashita, Hiroshi [2 ]
Kamikubo, Touya [3 ]
Suematsu, Nobuhiko J. J. [4 ,5 ]
Iima, Makoto [2 ]
机构
[1] Hiroshima Univ, Dept Integrated Arts & Sci, Higashihiroshima, Japan
[2] Hiroshima Univ, Grad Sch Integrated Sci Life, Higashihiroshima, Japan
[3] Hiroshima Univ, Dept Math, Higashihiroshima, Japan
[4] Meiji Univ, Meiji Inst Adv Study Math Sci MIMS, Nakano, Japan
[5] Meiji Univ, Grad Sch Adv Math Sci, Nakano, Japan
来源
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY | 2023年 / 11卷
关键词
E; gracilis; diorama environment; heterogeneous light condition; long time scale orbit; curvature radius; PHOTOTAXIS;
D O I
10.3389/fcell.2023.1133028
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
The cell motion of Euglena gracilis in homogeneous and heterogeneous light environments was analyzed. Homogeneous and heterogeneous environments were prepared, with only a red color or with a red circle surrounded by brighter white regions, respectively. In a heterogeneous environment, the cells move into the red circle. Swimming orbits at 1/25 s intervals for 120 s were analyzed. The speed distribution of the 1 s-averaged cell orbits in a homogeneous environment was different from that in a heterogeneous environment, where the faster swimming fraction was enhanced. The relationship between speed and curvature radius was analyzed using a joint histogram. Histograms for short timescale motion, constructed by 1 s-averaged orbits, suggest that the cell swimming curves are not biased, while those for long timescale motion, constructed by 10 s-averaged orbits, suggest that the cell swimming curves are biased in the clockwise direction. Furthermore, the curvature radius determines the speed, which does not seem to depend on the light environment. The mean squared displacement in a heterogeneous environment is larger than that in a homogeneous environment on a 1 s timescale. These results will be the basis for constructing a model for the long-time behavior of photomovement for light differences.
引用
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页数:8
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