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| Responses of marine microalgae Tetraselmis tetrathele to the changes of photoperiods |
| SUN Sui-han, DUAN Shun-shan |
| Institute of Hydrobiology, Jinan University, Guangzhou 510632, China |
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Abstract Microalgae Tetraselmis tetrathele was used as experimental materials. Two groups of experiments (A and B) were subjected to the treatments of short and long photoperiods, respectively. Group A of short photoperiod consisted of six treatments, ie. one, two, four, six, eight and ten hours of photoperiods, while Group B of long photoperiod also consisted of six treatments, ie. 14, 16, 18, 20, 22 and 23 hours of photoperiods. 12 h photoperiod was set as the control. The results showed that cell density, content of chlorophyll-a and intracellular protein of T. tetrathele in those treatments, ie. 6 h, 8 h, 10 h, 12 h, 14 h, 16 h and 18 h, were high but significantly low in the rest of treatments.
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Received: 25 August 2007
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