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Light-induced division synchrony inEuglena gracilisvar.Bacillaris

Authors
Journal
Experimental Cell Research
0014-4827
Publisher
Elsevier
Publication Date
Volume
21
Issue
3
Identifiers
DOI: 10.1016/0014-4827(60)90292-5

Abstract

Abstract Reserve energy of the photosynthetic flagellate Euglena gracilis when grown in continuous light of saturating intensity was estimated by following growth after removal of the culture to darkness. This information permitted the construction of a light-dark cycle, the light period of which provided energy just sufficient for growth and division for one life cycle, the temperature being maintained constant at 20 °C. Divisions were synchronous and repetitive, the population essentially doubling in number at each division “burst”. Addition of cysteine and methionine to the basal salt medium reduced the variance of the division bursts.

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