7/26/2019 Light Conditions Affect Directly the Growing and Photosynthesis of Microalgae

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Light conditions afect directly the growing and photosynthesis o microalgae(Duration and intensity). Microalgae needs a light/dark regime or productive

photosynthesis, it needs light or a photochemical phase to produce (!")

denosine triphosphate (#D"$) #icotinamide adenine dinucleotide phosphate%o&idase) and also needs dark or 'iochemical phase synthesie essential molecules

or growth. arvalho ., et. al., *++, studied light re-uirements in microalgalphotoreactors. !hey noticed that cultivating microalgae in photo'ioreactors ("s)

should 'e provided with appropriate light duration, intensity and wavelength.0nsu1cient light may lead to growth limiting or photoo&idation and inhi'ition.

ochet M., et. al., 234, studied certain conditions in southern $udson ay

(anadian rctic) rom March to May 235 to o'serve the response o sea%icemicroalgae to diferent changes in light intensity and -uality.

6hen algal growth was incu'ated under 'lue light it dou'led as compared to the

growth under white light. ccording to the availa'ility o 'lue green lightenvironment ice algae had adaptive response to it and showed high concentration

o chlorophyll. 7n the other hand the same algae responded to light spectrum when

in incu'ated under white illumination 'y increasing their chlorophyll. 8!he a'ility tochromatically adapt may 'ecome a critical actor in species competition8.

!he productivity o microalgae can 'e enhanced 'y cultivating the culture under

light emitting diodes (L9Ds) with peak emittance of 680 nm, this will result indou'ling the num'er o cells produced without changing the cell volume then the

culture is e&posed to white light in order to enlarge the cells sie so the overall

'iomass will increase.

http://rscc.umn.edu/rscc/v*m*/*;what%is%'ue%light)

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7/26/2019 Light Conditions Affect Directly the Growing and Photosynthesis of Microalgae

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