Comparative research on the growth characteristics of two microalgae under nonaxenic and axenic conditions

The growth characteristics of nonaxenic and axenic Oocystis borge and Chlorella sp.were studied.Effect of illumination and salinity on the growth of nonaxenic and axenic O.borge and Chlorella sp.were investigated.The results show that compared with nonaxenic microalgae,axenic microalgae can maintain a more stable and longer lasting culture.Illumination and salinity has effect significantly on the growth of nonaxenic and axenic O.borge and Chlorella sp.(P0.05).There were no significant(P0.05) differences in the growth rate of nonaxenic and axenic microalgae in the same conditions(P0.05).It indicates that axenic microalgae may instead of nonaxenic microalgae for research on the physiological and biochemical characteristics of microalgae and the relationship between microalgae and other biology.