The percentage of cytoskeleton-bound polysomes as affected by the physiological condition of plant cells

The effects of illumination, temperature, deficiency of water or oxygen, ph ytohormones, and seedling age on the proportion of cytoskeleton-bound polys omes (CBP) in plant tissues were studied. This proportion was shown to vary depending on factors affecting protein synthesis: it decreased under the i nfluence of factors inhibiting protein synthesis and reducing the relative content of polysomes in tissues (oxygen and water deficiencies, seedling ag ing) and vice versa increased under the influence of the factors promoting translation (cytokinin, light). The significance of reversible polysome att achment to the cytoskeleton as a mechanism controlling protein synthesis is discussed.