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| Effects of Temperature and Light on Growth of Single-celled Green Alga No .1102 |
| YUAN Zhu-tao,DONG Xiao-yu,LIU Sheng-ping |
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Abstract The planktonic single-celled alga (code number 1102) with high cultural density and strong ability to attach to the tank walls was separated and reserved in Gaolu Algae Research Center ,Qingdao Agricultural University .In this study ,a two factor experiment was conducted to investigate the effect of temperature (10 ℃ ,15 ℃ ,20 ℃ ,25 ℃ ,and 30 ℃) and light (500 lx ,1000 lx ,2000 lx ,4000 lx ,6000 lx ,8000 lx ,and 10 000 lx) on growth of the alga 1102 with triplication .The results showed that there was an interactive effect between temperature and light .The best growth was found in the treatment with 8000 lx ,and 25 ℃ .The correlation coefficient (r2 ) between pH variation and growth rate was 0 .9677 , w hich is an indicator of photosynthetic rate .On the other hand ,culture medium pH could be an optimum indicator for grow th because pH value is measured conveniently and rapidly .
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Received: 25 February 2014
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