PARAMYLON SYNTHESIS BY EUGLENA-GRACILIS PHOTOHETEROTROPHICALLY GROWN UNDER LOW O-2 PRESSURE - DESCRIPTION OF A MITOCHLOROPLAST COMPLEX
PARAMYLON SYNTHESIS BY EUGLENA-GRACILIS PHOTOHETEROTROPHICALLY GROWN UNDER LOW O-2 PRESSURE - DESCRIPTION OF A MITOCHLOROPLAST COMPLEX
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DOI：
10.1007/bf00385311
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发表时间：
1981-01-01
期刊：
影响因子：
4.3
通讯作者：
FARINEAU, J
中科院分区：
文献类型：
--
作者：
CALVAYRAC, R;LAVALMARTIN, D;FARINEAU, J
Special culture conditions for E. gracilis Z and ZR are described. They induce interactions between the chloroplast and mitochondrial metabolisms leading to paramylon synthesis. When grown in continuous light under pure N and in the presence of lactate as the sole C source, sugar synthesis occurs during the first 24 h of culture with the participation of both mitochondria (using lactate) and of chloroplasts (fixing CO2 from lactate decarboxylation). The activities of ribulose bisphosphate carboxylase, phosphoenolpyruvate carboxylase, and phosphoenolpyruvate carboxykinase are very high and mitochondria and chloroplasts develop then a common network of vesicles in which paramylon grains can be seen. EM demonstrated membrane continuity between the 2 types of organelles. Occasionally the mitochondrial matrix and the chloroplast stroma are separated by only a unit membrane.
