This volume emphasizes the involvement of all facets of biology in the analysis of environmentally controlled movement responses. This includes biophysics, biochemistry, molecular biology and as an integral part of any approach to a closer understanding, physiology. The initial euphoria about molecular biology as the final solution for any problem has dwindled and the field agrees now that only the combined efforts of all facets of biology will at some day answer the question posed more than hundred years ago: "How can plants see?". One conclusion can be drawn from the current knowledge as summarized in this volume. The answer will most likely not be the same for all systems.
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molecular basis. Action spectroscopy of photomovement. Light responses in purple photosynthetic bacteria. Color-sensitive vision by halobacteria. Photoactive yellow protein, a pPhotoreceptor from purple bacteria. Light reception and signal modulation during photoorietation of flagellate green algae. Algal eyes and their rhodopsin photoreceptors. Electrical events in photomovement of green flagellated algae. Rhodopsin-like-proteins:light detection pigments in leptolyngbya, euglena, ochromonas, pelvetia. Phototaxis of Euglena gracilis - flavins and pterins. Yellow-light sensing phototaxis in cryptomonad algae. Photo-stimulation effects on diatom motility. Photomovement of microorganisms in benthic and soil microenviroments. Phytochrome as an algal photoreceptor. Keeping in tune with time: entrainment of circadian rhythms. Photomovement in ciliates. Electrophysiology and light responses in stentor and blepharisma. Genetic analysis of phototaxis in dictyostelium. Photomovement and photomorphogenesis in physarum polycephalum: targeting of cytoskeleton and gene expression by light. Genetics of phycomyces and its responses to light. Phototropism in phycomyces. Phototropism in higher plants. Role of the microtubular cytoskeleton in coleoptile phototropism. Solar navigation by plants. Light-controlled chloroplast movement.
Donat-P. Häder, Dr. rer. nat., is a Professor of Botany, Department of Botany and Pharmaceutical Biology at the Friedrich-Alexander University at Erlangen, Germany. He received his doctoral degree and his habilitation from the University of Marburg. He had a research associate position at MSU, DOE, East Lansing, U.S.A. and was visiting scientist at the Chemistry Department, Lubbock, TX, U.S.A., CNR Pisa, Italy and the National Research Lab, Okazaki, Japan. Professor Häder has worked on the photomovement of microorganisms, the effect of solar ultraviolet radiation on phytoplankton and is involved in space biology studying the effect of microgravity on motility in flagellates. He is a member of a Committee on Ecology for the German ministry for science and technology, expert for an Enquete commission of the German Parliament and a member of a UNEP commission on the effects of the ozone destruction. One of the tools for his research activities is a real time image analysis system developed over the last fifteen years. He has published over 360 original papers and has been involved in eleven books as author, translator or editor.
Michael Lebert, Dr. rer. nat., is a senior scientist at the Department of Botany and Pharmaceutical Biology at the Friedrich-Alexander University at Erlangen, Germany. He received his doctoral degree from the University of Munich. He was a postdoctoral fellow at the WSU, Pullman, U.S.A. Dr. Lebert has worked on environmentally controlled signal transduction chains in microorganisms for 15 years. This includes the relevance of light and gravity on the behavioral reactions of motile protists and bacteria. In addition, he is interested in the effect of ultraviolet radiation on aquatic ecosystems. His special interest is in the interface between biology, electronics and computers.