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Induced division synchrony in ochromonas danica

, : Induced division synchrony in ochromonas danica. Acta Zoologica Sinica 36(1): 82-87

Healthy logarithmically growing cells of Ochromonas danica in axenic culture were used for the experiment. Cyclic treatment of 12 hours illumination by 2500 LUX warm daylight and 12 hours darkness induced the cells to divide synchronously at the end of the cycle, i.e. at the time from the last hour of dark period to the first hour of the following light period. Over 90% of the cells divided within the two hours if the culture was aerated. Cytological examination and counting of the cells collected at different intervals indicated that cell division was halted at prophase and once the prophase cells got through the blockade, they completed the division within 1-1.5 hours.


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