Effects of light on gravitaxis and velocity in Chlamydomonas reinhardtii.

Journal article


Publication Details

Author(s): Sineshchekov O, Lebert M, Häder DP
Journal: Journal of Plant Physiology
Publisher: Elsevier
Publication year: 2000
Volume: 157
Pages range: 247 - 254
ISSN: 0176-1617


Abstract


The effects of light on gravitaxis and velocity in the bi-flagellated green alga Chlamydomonas reinhardtii were investigated using a real time automatic tracking system. Three distinct light effects on gravitaxis and velocity with parallel kinetics were found. Photosynthetically active continuous red light reversibly enhances the swimming velocity and increases or decreases the precision of gravitaxis, depending on its initial level. Blue light flashes induce fast transient increases in velocity immediately after the photophobic response, and transiently decrease or even reverse negative gravitaxis. The calcium dependence of this response, its fluence-response curve and its spectral characteristics strongly suggest the participation of chlamy-rhodopsin in this effect. The third response, a prolonged activation of velocity and gravitaxis, is also induced by blue light flashes, which can be observed even in calcium-free medium.



FAU Authors / FAU Editors

Häder, Donat-Peter Prof. Dr.
Naturwissenschaftliche Fakultät
Lebert, Michael PD Dr.
Lehrstuhl für Zellbiologie


How to cite

APA:
Sineshchekov, O., Lebert, M., & Häder, D.-P. (2000). Effects of light on gravitaxis and velocity in Chlamydomonas reinhardtii. Journal of Plant Physiology, 157, 247 - 254. https://dx.doi.org/10.1016/S0176-1617(00)80045-0

MLA:
Sineshchekov, Oleg, Michael Lebert, and Donat-Peter Häder. "Effects of light on gravitaxis and velocity in Chlamydomonas reinhardtii." Journal of Plant Physiology 157 (2000): 247 - 254.

BibTeX: 

Last updated on 2018-19-04 at 02:38