Investigation on the use of blue and yellow light-emitting diodes (LEDs) for growth, proximate composition enhancement and morphology of marine microalga Isochrysis sp.
Microalgae are photoautotrophic organisms that need light as their main energy source. In this study, the growth, proximate composition and morphology of marine microalga, Isochrysis sp., cultured under blue and yellow light-emitting diodes (LED) with fluorescent light as control were compared...
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| Format: | Project Paper Report |
| Language: | English |
| Published: |
2016
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| Online Access: | http://psasir.upm.edu.my/id/eprint/78211/1/FPV%202016%2053%20-%20IR.pdf http://psasir.upm.edu.my/id/eprint/78211/ |
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| Summary: | Microalgae are photoautotrophic organisms that need light as their main energy
source. In this study, the growth, proximate composition and morphology of marine
microalga, Isochrysis sp., cultured under blue and yellow light-emitting diodes (LED)
with fluorescent light as control were compared. Growth of the microalga was observed
for 13 days and the effect of the three different light sources on cell count, optical density
and specific growth rate were determined. At the end of the experiment, results showed
that Isochrysis sp. cultured under fluorescent light had highest specific growth rate
(SGR)while yellow LED and blue LED cultures had similar SGR. Yellow LED and
fluorescent light produced higher cell density in culturing Isochrysissp. The cultures were
harvested during the stationary phase and proximate analysis was done. Lipid content was significantly higher in Isochrysis sp. grown under yellow LED, whereas, protein
composition was significantly higher in blue and yellow LED cultures. Yellow LED and
fluorescent light cultures also had significantly high carbohydrate composition compared
to blue LED cultures. Cell morphology was studied under scanning electron microscope
during initial and final stage of the microalga cultures and fluorescent light produced the
largest cells. Thus, it can be concluded that yellow LED had the optimum wavelength for
Isochrysis sp. culture. Besides that, different wavelength of lights also affected the
morphology of the microalga cells. |
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