Therefore, continuously, the aims of current study are to estimate the effects of different plant growth regulators on the growth and lipid accumulation of microalgal H. pluvialis in two-stage culture with three different volumes as 250 mL, 10 L and 1,000 L. | Effect of plant growth regulators on growth and lipid accumulation of microalgal Haematococcus Pluvialis flotow in two-stage culture