Abstract:

In this study,Antarctic yeast NJ298 was identified,and the effects of major environmental factors on the growth and astaxanthin production of NJ298 were investigated.The results indicated that the strain belonged to the genus Rhodotorula based on physico-chemical traits,morphological traits and phylogenetic analysis of ITS rDNA sequences.The astaxanthin was accumulated at the exponential phase and the stationary phase.The optimum carbon and nitrogen sources for astaxanthin production were sodium acetate and peptone,respectively.In range of 0—15℃ Rhodotorula sp.NJ298 could grow,and low temperature could favor astaxanthin accumulation.In range of pH 6—8,Rhodotorula sp.NJ298 could grow,and the optimum pH condition for growth was 7.5.NaCl was not necessary to station NJ298.