[Electrostriction properties of the plasma membrane of the lower epidermis of the bulb of bulb onions].

Electrostriction properties of onion bulb epidermis plasma membrane were investigated in a wide frequency range 40 Hz divided by 2kHz and alternative voltage magnitude 140 mV divided by divided by 700 mV. Dynamic Young's modulus [E perpendicular] in direction normal to the membrane surface and loss angle were measured; strong [E perpendicular] and phi dependences on frequency were demonstrated. [E perpendicular] rises as the frequency increases and reached 10(8)-10(9) Pa like BLM prepared from egg lectin-n-hexadecane solution. In the temperature range of 19-30 degrees C [E perpendicular] does not vary more than 20%. The values phi approximately 60 degrees are obtained for different preparations in the whole frequency range. A correlation between electrostriction properties and the physiological state of preparation is marked.