Journal of Plant Biology
- 제29권3호
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- Pages.145-156
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- 1986
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- 1226-9239(pISSN)
Paramecium bursaria와 공생하는 Chlorella와 Chlorella ellipsoidea의 질소대사에 관한 비교연구
A Comparative Study on the Nitrogen Metabolism of Symbiotic Chlorella from Paramecium bursaria with Chlorella ellipsoidea
초록
The excretion of ammonia and glutamine synthetase activities were measured in aposymbiotic Paramecium and symbiotic Paramecium. The uptake of nitrate and ammonia, and specific enzyme activities of nitrate reductase, glutamate dehydrogenase and glutamine synthetase were investigated in symbiotic Chlorella from Paramecium bursaria and Chlorella ellipsoidea. The ammonia concentration in the culture media of aposymbiotic Paramecium was increased according to the growth of the Paramecium but it was not changed in symbiotic Paramecium. Nitrate, the major nitrogen source, was taken up at a rate of 0.635 nmol/ 106 Chlorella/hr in Chlorella ellipsoidea. Most of ammonia was assimilated to glutamine by glutamine synthetase, of which acitivty was 1,467
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