Phototactic response

This chapter first describes the underwater UV environment. The different types of phototactic responses, such as positive versus negative phototaxis, are then described and related to UV tolerance as well as UV vision. Finally, implications for behavioral responses to UVR are addressed, including the role of UVR in diel vertical migration (DVM) and predator-prey interactions. 

Feinleib, M. E. H. and Cmry, G. M. (1971) The relationship between stimulus intensity and oriented phototactic response (topotaxis) in Chlamydomonas. Physiol. Plant. 25, 346-352. 

C34H24O10, Mr 592.56, dark solid, mp. >350 °C. Pigment related to hypericin from the unicellular dilate Stentor coeruleus. The compound acts as a photoreceptor and induces photophobic and negative phototactic responses. S. was already described by Lan-... 

Photosensors in ciliated protozoans exhibiting step-up photophobic and negative phototactic responses. 

Diehn,B., 1969 - Action spectra of the phototactic responses in Euglena. Biochim. Biophys. Acta, 177 136. 

Treating the non-adiabatic photochemistry of large systems in an environment is computationally demanding. A possible strategy can be QM/MM trajectory-based semi-classical dynamics, as exemplified by simulations of the photoactivation of the photoactive yellow protein (PYP) [91-93], a bacterial photoreceptor believed to be responsible for negative phototactic response to blue light of Halorhodospira halophila bacteria. 

Kawai, H., Mueller, D.G., Foelster, E., and Haeder, D.-R, Phototactic responses in the gametes of the brown alga Ectocarpus siliculosus, Planta, 182, 292,1990. 

Horiguchi, T, Kawai, H., Kubota, M., Takahashil, T, and Watanabe, M., Phototactic responses of four marine dinoflagellates with different types of eyespot and chloroplast, Phycol. Res., 47, 101-107,1999. 

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