A Review Paper on Effect of Phosphate on Growth of Diatoms

Diatoms (Bacillariophyceae) are microscopic unicellular algae found in every aquatic habitat and contribute a large percentage of global carbon budgets through photosynthesis. Astudy was conducted to assess the effect of phosphate concentration on diatom growth. The freshwater diatoms were cultured in modified SAG media supplemented with different concentration(0.01 mM to 0.07 mM) of K HPO as phosphate source and incubated at 20.0 ± 2.0ºC and 4000 ± 10 lux (=lumem/m) cool white bulb with 16 h of light and 8 h of darkness. The external supplement of K HPO caused the phosphorus availability to be key factor in cell-division rate with increasing concentration of phosphate in medium. In this present study, it was found that Growth responses of diatoms showed gradual increase in the growth at 0.01, 0.02, 0.03, 0.04, 0.05 mM and gets maximum at 0.05 mM concentration of K HPO whereas diatom growth was declined when concentration increases more than 0.05 mM.