The Effect of Variable Light Source and Light Intensity on the Growth of Three Algal Species

0557082 - MBÚ 2023 RIV CH eng J - Journal Article
Bialevich, Vitali - Zachleder, Vilém - Bišová, Kateřina
The Effect of Variable Light Source and Light Intensity on the Growth of Three Algal Species.
Cells. Roč. 11, č. 8 (2022), č. článku 1293. E-ISSN 2073-4409
R&D Projects: GA ČR(CZ) GA19-12607S
Institutional support: RVO:61388971
Keywords : chlamydomonas-reinhardtii * emitting-diodes * lipid-content * cell-cycle * microalgae * photosynthesis * chlorella * accumulation * temperature * cultivation * Chlamydomonas reinhardtii * Parachlorella kessleri * Desmodesmus quadricauda * light intensity * cell growth * led * fluorescent tube
OECD category: Cell biology
Impact factor: 6, year: 2022
Method of publishing: Open access
https://www.mdpi.com/2073-4409/11/8/1293

Light is the essential energy source for autotrophically growing organisms, including microalgae. Both light intensity and light quality affect cell growth and biomass composition. Here we used three green algae-Chlamydomonas reinhardtii, Desmodesmus quadricauda, and Parachlorella kessleri-to study the effects of different light intensities and light spectra on their growth. Cultures were grown at three different light intensities (100, 250, and 500 mu mol m(-2) s(-1)) and three different light sources: fluorescent lamps, RGB LEDs, and white LEDs. Cultures of Desmodesmus quadricauda and Parachlorella kessleri were saturated at 250 mu mol m(-2) s(-1), and further increasing the light intensity did not improve their growth. Chlamydomonas reinhardtii cultures did not reach saturation under the conditions used. All species usually divide into more than two daughter cells by a mechanism called multiple fission. Increasing light intensity resulted in an increase in maximum cell size and division into more daughter cells. In Parachlorella kessleri cells, the concentration of photosynthetic pigments decreased with light intensity. Different light sources had no effect on algal growth or photosynthetic pigments. The results show a species-specific response of algae to light intensity and support the use of any white light source for their cultivation without negative effects on growth.
Permanent Link: http://hdl.handle.net/11104/0331256