Effects of light on growth rate, chlorophyll level and cell cycle in four alga species
LIU Qing, ZHANG Xiao-fang, LI Tai-wu, SU Xiu-rong
1. School of Life Science and Technology, Dalian Fisheries Univ. , Dalian 116023, China; 2. College of Life Sciences, Ningbo University, Ningbo 315211, China
Abstract: Growth rate and chlorophyll content in four alga species Chlorella, lsochrysis zhanjiangersis, Platymonas helgolandica and Dunaliella viridis were determined in different photoperiods, light intensity and light quality. Results showed that there was the maximal growth in photoperiod of 18L： 6D, which was 0. 227, 0. 150, 0. 175 ind./d and 0. 360 ind./d for Chlorella, Isochrysis zhangjiangersis, Platymonas helgolandica and Dunaliella viridis, respectively. Maximal growth rate was also observed at 5 000 lx light intensity, which was 0.225, 0. 188, 0. 174 ind./d and 0. 261 ind./d for Chlorella, Isochrysis zhangjiangersis, Platymonas helgolandica and Dunaliella viridis, respectively. In different light spectra, maximal growth occurred in white light, which was 0. 185, 0. 165, 0.257 ind./d and 0. 322 ind./d for Chlorella, Isochrysis zhangjiangersis, Platymonas helgolandica and Dunaliella viridis, respectively. There was higher chlorophyll content in blue light than in other treatments. Also, cell cycle of Platymonas sp. was studied in four light qualities. Results indicated that proportion of stage G1 of Platymonas sp. was the least in red light, followed by white light. The proportion of stage G1 were 3.8% - 5.9% higher in green and blue light than in red and white light. It is suggested that nature and red light be the optimal culture light quality.
刘青, 张晓芳, 李太武, 苏秀榕. 光照对4种单胞藻生长速率、叶绿素含量及细胞周期的影响[J]. 大连海洋大学学报, 2006, 21(1): 24-30.
LIU Qing, ZHANG Xiao-fang, LI Tai-wu, SU Xiu-rong. Effects of light on growth rate, chlorophyll level and cell cycle in four alga species. Journal of Dalian Ocean University, 2006, 21(1): 24-30.
2006, Vol. 21 
