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Electron spin resonance signals and cell structure ofChlorella pyrenoidosagrown under different light intensities

Authors
Journal
Journal of Molecular Biology
0022-2836
Publisher
Elsevier
Publication Date
Volume
10
Issue
1
Identifiers
DOI: 10.1016/s0022-2836(64)80027-9

Abstract

Chlorella pyrenoidosa grown under low (100 foot-candles) and high light intensity (1050 foot-candles) exhibit marked changes in electron spin resonance signals. The ratio of the light-induced fast rise, fast decay signal (signal I) to the broader, slow decay signal (signal II) is greater in the low-light grown cells. The ratios of paramagnetic ion signals apparently due to ferric (Fe 3+) ion and manganous (Mn 2+) ion are also greater in the low-light grown cells. Electron micrographs show that the most salient change in cell structure of the cells grown under low light is a marked increase in the number and density of the lamellae. The effect of heat treatment of cells on cell structure and electron spin resonance signals also is discussed.

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