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| The effect of light intensity on the cell density and chain length of Anabaena flos-aquae |
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Abstract In order to discover the relation between the light availability of Anabaena flos-aquae and the key factors in its sinking and floating which were cell density and chain length, pure culture experiments were conducted under different conditions of illumination. In addition, the relation between sinking loss ratio and light availability was also studied. With culture period of 35d, (25±1)℃, the results showed that: The cell density of Anabaena flos-aquae increased under higher light intensity, after reaching its maximum at 10th day the cell density decreased and became stable. The length of Anabaena flos-aquae decreased with the increase of light intensity, and the trend over time was that it reached the maximum then decreased. The higher the light intensity, the sooner it reached the maximum. Under high light intensity the sinking loss ratio of Anabaena flos-aquae remained very low which was under 10%, while under low light intensity it was generally higher than 20% with the maximum 57.3%.
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Received: 26 August 2011
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| [1] |
. [J]. CHINA ENVIRONMENTAL SCIENCECE, 2007, 27(3): 0-0. |
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