ニシモリ　ヒラク   NISHIMORI HIRAKU   西森　拓    所属   明治大学研究・知財戦略機構・農場  研究・知財戦略機構    職種   特任教授
言語種別	英語
発行・発表の年月	2016
形態種別	学術雑誌
査読	査読あり
標題	The Flux of Euglena gracilis Cells Depends on the Gradient of Light Intensity.
執筆形態	共著(筆頭者以外)
掲載誌名	PloS one
掲載区分	国外
巻・号・頁	11(12),pp.e0168114
著者・共著者	Ogawa Takuma, Shoji Erika, Suematsu Nobuhiko J, Nishimori Hiraku, Izumi Shunsuke, Awazu Akinori, Iima Makoto
概要	This study quantifies the photomovement behavior of Euglena gracilis in response to light intensity gradients, aiming to better understand their role in bioconvection patterns. Two experiments were conducted. In the first, a capillary with cell suspension was exposed to different light intensities in two regions. The steady-state cell distribution showed a linear relationship with the light difference: more cells gathered in the brighter region at low mean intensity (1.25 μmol m⁻² s⁻¹), while the opposite occurred at high mean intensity (13.75 μmol m⁻² s⁻¹). In the second experiment, a shallow container was illuminated with stepwise light levels. Cells accumulated around a light intensity of approximately 3.8 μmol m⁻² s⁻¹, suggesting this value as the preferred intensity (Ic). These findings demonstrate that E. gracilis exhibits a clear response to light gradients, with behavior dependent on both the direction and strength of the light.
DOI	10.1371/journal.pone.0168114
ISSN	1932-6203
PMID	28033336