منابع مشابه
Photosynthetic activity during the division cycle in synchronized Euglena gracilis.
Axenic populations of the photosynthetic protozoan Euglena gracilis, grown with autotrophic nutrition, were synchronized with respect to cell division by culture on an alternating light-dark cycle. No cell divisions occurred in the light periods; approximately 100% of the cells divided in the dark periods. In such cultures, the synthesis of photosynthetic pigments and accumulation of polysaccha...
متن کاملSelection for synchronized cell division in simple multicellular organisms
The evolution of multicellularity was a major transition in the history of life on earth. Conditions under which multicellularity is favored have been studied theoretically and experimentally. But since the construction of a multicellular organism requires multiple rounds of cell division, a natural question is whether these cell divisions should be synchronous or not. We study a simple populat...
متن کاملPhotosynthetic products of division synchronized cultures of euglena.
Rates and products of photosynthetic (14)CO(2) fixation by division synchronized cultures of Euglena gracilis strain Z were determined over the cycle. Rate of (14)CO(2) fixation doubled in a continuous manner throughout the light phase followed by a slight reduction of photosynthetic capacity in the dark phase. Greater (14)C incorporation into the nucleic acid-polysaccharide fraction occurred w...
متن کاملSynchronized Cell Division in Tetrahymena Pyriformis following Inhibition with Vinblastine
The ability of Tetrahymena pyriformis to undergo synchronous division following release of inhibition with vinblastine was examined. The degree of synchrony was shown to be correlated with the period of time spent under the influence of vinblastine. Cells were inhibited for different periods of time with vinblastine and then washed free of the inhibitor with fresh medium. The increase in cell n...
متن کاملAnalysis of the time of utilization of proteins for the initiation and completion of division in synchronized Tetrahymena pyriformis.
We exposed division-synchronized Tetrahymena pyriformis to pulse treatments with the structural amino acid analogue p-fluorophenylalanine. We related the timing of the treatments to the delays in onset or completion of division, or both. The results enable us to distinguish between early and late phases in cell division in which the cells bring into action proteins which contribute to initiate ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1998
ISSN: 0028-0836,1476-4687
DOI: 10.1038/34286