Project information
The effect of quality and quantity of light on the life cycle of the green chlorococcal alga Scenedesmus obliquus
- Project Identification
- GA204/03/1113
- Project Period
- 1/2003 - 12/2005
- Investor / Pogramme / Project type
-
Czech Science Foundation
- Standard Projects
- MU Faculty or unit
-
Faculty of Science
- doc. RNDr. Vladislav Cepák, CSc.
The Scenedesmus obliquus life cycle includes a vegetative phase (autospore production) and a poorly understood sexual one (gamete production). During gametogenesis potential vegetative cells are converted into gametes. Generally, in photosyntheticorganisms this differentiation is triggered by consecutive environmental signals, first chemical, i.e. nitrogen depletion, and then physical, i.e. light. The cytologicaly simple S. obliquus, lacking elaborate gametangia, is suitable for gametogenesisexperimentation. Nitrogen starvation, reduced light, a temperature of 15°C, and high cell densities (>107 ml-1) appear necessary. In some respects the process in Scenedesmus is similar to that for Chlamydomonas reinhardtii, a frequently used modelsystem, where both adequate light intensity and quality are critical. The object of this proposal is to identify new amplifying conditions for increased gamete production in S. obliquus, focusing on light quality, especially blue light.
Publications
Total number of publications: 5
2006
-
Comparative study of zooid and non-zooid forming strains of Scenedesmus obliquus. Physiology and Cytomorphology
Folia Microbiologica, year: 2006, volume: 51, edition: 4
-
The effect of colour light on production of zooids in 10 strains of the green chlorococcal alga Scenedesmus obliquus
Czech Phycology, year: 2006, volume: 6, edition: 1
-
The effect of light of differing spectral qualities on the nucleocytoplasmic and chloroplast cycle of the green chlorococcal alga Scenedesmus obliquus
Folia Microbiologica, year: 2006, volume: 51, edition: 3
2005
-
Chromium influences growth and cell morphology but itself does not induce gametogenesis in three Scenedesmus obliquus strains
Czech Phycology, year: 2005, volume: 5, edition: 1
-
Visualization of DNA-containing structures in various species of Chlorophyta, Rhodophyta and Cyanophyta Using SYBR Green I Dye
Folia Microbiologica, year: 2005, volume: 50, edition: 4