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Description
(Text)
In a broad context, the term photomovement encompasses any movement or its alteration induced by light. Photomovement is the result of the photoregulation of movement - which includes an entire complex of elementary processes caused by a light stimulus such as photoreception, primary reactions of the photoreceptor pigments, and the sensory transduction of the light stimulus into a physiological signal that governs the activity of the motor apparatus and results in the photoorientation of the organism.
The authors review the historical development and current state of the art in the biology of photomovement in algae and discuss problems in terminology and a logical basis for classification of photomovement in microorganisms. Their research has focused on two species of Dunaliella Teod., D. salina Teod. and D. viridis Teod., as the principal organisms investigated. The results of experimental investigations on the critical factors controlling and modulating photomovement aredescribed and include the effects of various abiotic factors and critical aspects of photomovement.
(Table of content)
Photomovement of Algae - Historical Overview of Research and Current State of the Art.- Terminology and the Fundamentals of Classification of Light-induced Behaviour in Freely Motile Microorganisms.- Investigations With Species of Dunaliella Teod..- Investigation of Photomovement in Dunaliella.- Effect of Abiotic Factors on Photomovement Parameters of Dunaliella.- Structure of the Photoreceptor System.- Identification of Photoreceptor Pigments.- Mechanisms of Photoreception and Photoorientation in Dunaliella.- Sensory Transduction.- Flagella Apparatus.- Applied Aspects of Aquatic Biomonitoring Using the Photomovement of Dunaliella.- Dunaliella Biotechnology.- General Results and Perspectives of Further Investigations.
(Text)
In a broad context, the term photomovement encompasses any movement or its alteration induced by light. Photomovement is the result of the photoregulation of movement - which includes an entire complex of elementary processes caused by a light stimulus such as photoreception, primary reactions of the photoreceptor pigments, and the sensory transduction of the light stimulus into a physiological signal that governs the activity of the motor apparatus and results in the photoorientation of the organism.
The authors review the historical development and current state of the art in the biology of photomovement in algae and discuss problems in terminology and a logical basis for classification of photomovement in microorganisms. Their research has focused on two species of Dunaliella Teod., D. salina Teod. and D. viridis Teod., as the principal organisms investigated. The results of experimental investigations on the critical factors controlling and modulating photomovement aredescribed and include the effects of various abiotic factors and critical aspects of photomovement.
Contents
Photomovement of Algae - Historical Overview of Research and Current State of the Art.- Terminology and the Fundamentals of Classification of Light-induced Behaviour in Freely Motile Microorganisms.- Investigations With Species of Dunaliella Teod..- Investigation of Photomovement in Dunaliella.- Effect of Abiotic Factors on Photomovement Parameters of Dunaliella.- Structure of the Photoreceptor System.- Identification of Photoreceptor Pigments.- Mechanisms of Photoreception and Photoorientation in Dunaliella.- Sensory Transduction.- Flagella Apparatus.- Applied Aspects of Aquatic Biomonitoring Using the Photomovement of Dunaliella.- Dunaliella Biotechnology.- General Results and Perspectives of Further Investigations.
