We evaluated the effect of illuminance (12 000, 8 000, and 4 000 lx), temperature (15), salinity (31, 28, 24, and 20), and the ratio of nitrogen to phosphorus (50∶1) on growth, apparent photosynthesis, dark respiration, and pigment content of the primary receptacles of collected from the Taipingjiao coast, Qingdao. We tested the influence of these factors in four single-factor experiments. The highest values for specific growth rate and apparent photosynthesis rate were observed in algal plants reared under 8 000 lx, 20and salinity 20. Exposure to 12 000 lx significantly inhibited growth and photosynthesis. The specific growth rate at 15<0.05). The specific growth rate and apparent photosynthesis rate increased significantly when salinity decreased from 31 to 28. As illuminance and temperature increased, pigment content decreased. Chlorophyll and carotenoid content were significantly influenced by the environmental factors, whereas levels of Chlorophyll c remained stable. The growth and photosynthesis of the primary receptacles was significantly influenced by the ratio of nitrogen to phosphorus. The range of suitable ratios was between 51. A ratio of 501 resulted in inhibition of growth and photosynthesis. Changes in the concentration of phosphorus affected the photosynthesis of primary receptacles more significantly than did changes in nitrogen. Thus, phosphorus appears to be more important during the growth of reproductive organs in than nitrogen. The ratio of nitrogen to phosphorus had no effect on the pigment content. Culture media that was rich in nitrogen or phosphorus had a beneficial effect on the accumulation of pigment. Our results provide guidance for the optimization of artificial breeding technologies for