THE DIFFERENTIATION OF THE PHOTOSYNTHETIC APPARATUS AND THE INTRA-CYTOPLASMIC MEMBRANE IN CELLS OF RHODOPSEUDOMONAS CAPSULATA UPON VARIATION OF LIGHT-INTENSITY

  • 1 January 1980
    • journal article
    • research article
    • Vol. 23  (1) , 1-5
Abstract
Cells of R. capsulata were grown at growth-limiting light intensity (7 W .cntdot. m-2). The cellular bacteriochlorophyll (Bchl) content increased 13-fold; the Bchl concentration of membranes, 3.4-fold; the concentration of reaction centers in membranes, 1.6-fold; the size of the photosynthetic unit, 2-fold; the concentration of carotenoids in membranes, 2.4-fold and the number of intracytoplasmic membrane vesicles, bearing the photosynthetic apparatus, 6.3-fold, in comparison with cells grown at 2000 W .cntdot. m-2 light intensity. The variation of incident light intensity mainly caused a variation of the amount of intracytoplasmic membrane vesicles per cell, but also a variation of the size and concentration of photosynthetic units in the membrane system.

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