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Expansion-capacity of naked plant protoplasts

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Summary

  1. 1.

    Naked protoplasts from different plant objects were made to expand gradually until their plasma-membranes burst.

  2. 2.

    The upper limit of the plasma-membranes' expansion-capacity seems to be about 200 % of the normal surface-area. This indicates that the following thicknesses and types of continuous lipoid membranes, pictured byDanielli (1936), are possible: Either type 1f and two layers of lipoid molecules, or type 1 b and four layers of lipoid molecules.

  3. 3.

    The plasma-membrane contains a fixed amount of substance which cannot be increased or diminished by compelling it to expand or contract.

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Literature cited

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Authors and Affiliations

  1. Botanical Institute of Helsinki University, Finland

    S. B. Törnävä

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  1. S. B. Törnävä
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To Professor R.Collander, who has lead and advised me in carrying out this work, I herewith express my sincerest thanks.

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Törnävä, S.B. Expansion-capacity of naked plant protoplasts. Protoplasma 32, 329–341 (1939). https://doi.org/10.1007/BF01797041

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  • DOI: https://doi.org/10.1007/BF01797041

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