The beating pattern of the flagellum of Euglena gracilis under altered gravity during parabolic flights

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Strauch S, Richter P, Schuster M, Häder DP
Zeitschrift: Journal of Plant Physiology
Verlag: Elsevier
Jahr der Veröffentlichung: 2010
Band: 167
Heftnummer: 1
Seitenbereich: 41-46
ISSN: 0176-1617


Abstract


The unicellular freshwater flagellate Euglena gracilis shows negative gravitactic behavior. Previous experiments have revealed that the orientation is most likely an active physiological process in which the beating pattern of the flagellum is controlled by gravity and mediated by a change in the calcium concentration inside the cell. In a signal transduction chain, the calcium signal activates a calmodulin, which in turn raises the concentration of cAMR This alters the beating pattern of the flagellum; reorientation is therefore not a passive process driven by buoyancy. In a recent parabolic flight experiment (ESA 45th parabolic flight campaign), we observed the beating of the flagellum with a high-resolution light microscope. Transition from hyper g to mu g as well as from mu g to hyper g caused a change of the beating pattern of the flagellum, which confirmed the physiological nature of the process. In mu g cells stopped moving the flagellum or tried to reorient, while in hyper g, the cells realigned consecutively. The reaction times for the flagellar responses in previous experiments are confirmed. (C) 2009 Elsevier GmbH. All rights reserved.



FAU-Autoren / FAU-Herausgeber

Häder, Donat-Peter Prof. Dr.
Naturwissenschaftliche Fakultät
Richter, Peter Dr.
Lehrstuhl für Zellbiologie
Schuster, Martin
Lehrstuhl für Zellbiologie
Strauch, Sebastian Dr.
Lehrstuhl für Zellbiologie


Zitierweisen

APA:
Strauch, S., Richter, P., Schuster, M., & Häder, D.-P. (2010). The beating pattern of the flagellum of Euglena gracilis under altered gravity during parabolic flights. Journal of Plant Physiology, 167(1), 41-46. https://dx.doi.org/10.1016/j.jplph.2009.07.009

MLA:
Strauch, Sebastian, et al. "The beating pattern of the flagellum of Euglena gracilis under altered gravity during parabolic flights." Journal of Plant Physiology 167.1 (2010): 41-46.

BibTeX: 

Zuletzt aktualisiert 2018-11-08 um 02:45