Chemotactic Behavior of <Emphasis Type="Italic">Chlamydomonas reinhardtii</Emphasis> Is Altered During Gametogenesis |
| |
Authors: | Elena V Ermilova Zhanna M Zalutskaya Tatyana V Lapina Maksim M Nikitin |
| |
Institution: | (1) Laboratory of Microbiology, Biological Research Institute of St. Petersburg University, Oranienbaumskoe schosse 2, Stary Peterhof, St. Petersburg, 198504 Russia, RU |
| |
Abstract: | Chemotactic behavior of Chlamydomonas reinhardtii is altered during the sexual life cycle. Unlike vegetative cells and noncompetent pregametes, mature gametes did not show
chemotaxis to ammonium. Loss of chemotaxis to ammonium in mating-competent cells is controlled by gamete-specific genes that
are common for both mating-type gametes. Change of chemotaxis mode requires the sequential action of the two environmental
signals: removal of ammonium from the medium and light. The mutants lrg1, lrg3, and lrg4 affected in the light-dependent step of sexual differentiation exhibited the loss of chemotaxis to ammonium in the absence
of light. These data indicate that there are common components in the signaling pathways that control change of chemotactic
behavior and forming of mating competence in gametes.
Received: 14 May 2002 / Accepted: 21 June 2002 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|