Abstract: Porphyridium is a valuable algae which is a potential source of several high valued polymers like polysaccharides,polyunsaturated fatty acids and pigments.Many environment factors effect the growth of Porphyridium aerugineum.The effects of light intensity,photoperiod,salinity,shaken and static cultures,NaHCO 3 and glucose on growth of Porphyridium aerugineum were studied.The absorption spectra of the algae was also analysed.All these studies are proposed to find those optimization of culture conditions of Porphyridium aerugineum.

Key words: Porphyridium aerugineum, cultures, light intensity, photoperiod, salinity, absorption spectra