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Phototactic Orientation by the Marine Dinoflagellate Gyrodinium dorsum Kofoid.
Author(s) -
HAND WILLIAM G.,
SCHMIDT JEFFREY A.
Publication year - 1975
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1975.tb05217.x
Subject(s) - phototaxis , dinoflagellate , flagellum , orientation (vector space) , rotation (mathematics) , eyespot , dorsum , biology , anatomy , computer science , ecology , zoology , geometry , paleontology , computer vision , botany , mathematics , bacteria
SYNOPSIS. The phototactic orientation of the dinoflagellate Gyrodinium dorsum was examined using photomicrographic, cinematographic, and closed‐circuit television technics. Particular emphasis was placed on examining the movements and possible roles of the flagella during orientation. The data suggest that the longitudinal flagellum is primarily responsible for phototactic orientation, while the lateral flagellum is involved in forward propulsion and cell rotation. A possible receptor mechanism is proposed by which light direction sensing is accomplished.