Flagellar photoresponses of ptx1, a nonphototactic mutant of Chlamydomonas

Cell Motility and the Cytoskeleton
U Rüffer, W Nultsch

Abstract

Phototaxis in wild-type Chlamydomonas cells is probably the result of four single photoresponses in the flagella, inverse in the cis (near the eyespot) and in the trans flagellum and also inverse by step-up (increase of) and step-down (decrease of) light stimulation as experienced by the eyespot during rotation of the cell [Rüffer and Nultsch, 1991: Cell Motil. Cytoskeleton 18:269-278]. Two inverse sets of the four responses are supposed to be the cause for positive and negative phototaxis. The relevant flagellar responses consist of shifts of the front amplitude of the breaststroke beats. As single flagellar responses cannot be called "phototactic" they are termed "breaststroke flagellar photoresponses." The mutant strain ptx1 is defective in phototaxis but displays photoshocks [Horst and Witman, 1993: J. Cell Biol. 120:733-741]. Analysis of flagellar beat patterns in high-speed records of ptx1 cells held on micropipettes shows that breaststroke flagellar photoresponses exist in this mutant in spite of the loss of phototaxis. It is the cis/trans differentiation that is lost in ptx1: both flagella always respond in the same way and not inversely as in wild-type cells. Equal shifts of beat amplitude cannot cause a turn of the ce...Continue Reading

References

Jun 1, 1988·Photochemistry and Photobiology·W Nultsch, D P Häder
Aug 1, 1987·The Journal of Cell Biology·G I McFaddenM Melkonian
Jan 1, 1986·Cell Motility and the Cytoskeleton·J L SalisburyM A Sanders
Oct 1, 1995·The Journal of Cell Biology·G J PazourG B Witman
Feb 1, 1993·The Journal of Cell Biology·C J Horst, G B Witman

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Citations

Jan 16, 2015·Journal of the Royal Society, Interface·Rachel R Bennett, Ramin Golestanian
Nov 24, 1999·International Journal of Plant Sciences·V KamL J Feldman
Apr 20, 2005·Cell Motility and the Cytoskeleton·Keith JosefKenneth W Foster
Apr 26, 2005·Cell Motility and the Cytoskeleton·Keith JosefKenneth W Foster
Mar 26, 2003·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Carol L Dieckmann
Nov 26, 2015·Annual Review of Fluid Mechanics·Raymond E Goldstein
Apr 29, 2016·Proceedings of the National Academy of Sciences of the United States of America·Noriko UekiKen-Ichi Wakabayashi
May 5, 2001·Annual Review of Plant Physiology and Plant Molecular Biology·Elizabeth H Harris
Dec 19, 1998·Cell Motility and the Cytoskeleton·U Rüffer, W Nultsch
Jun 19, 2010·Human & Experimental Toxicology·Paolo BellaviteMarta Marzotto
Oct 12, 2018·Journal of the Royal Society, Interface·Yujie LiuDouglas R Brumley
Oct 29, 2013·Physical Review Letters·Kyriacos C LeptosRaymond E Goldstein
May 11, 1999·Trends in Plant Science·O A Sineshchekov, E G Govorunova
Oct 8, 1999·Genetics·M R LambC L Dieckmann

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