Cellular Expansion at Low Temperature as a Cause of Membrane Lesions

摘要: Rates of solute leakage from excised discs cucumber (Cucumis sativus L. cv Straight Eight) cotyledons were altered by temperature during plasmolysis in the manner a simple diffusion phenomenon; log rate increased proportion to temperature. During deplasmolysis, however, rates responded with very different pattern: chilling conditions (below about 20°C) caused large increases rates, indicating disruption membrane integrity tissues. The time course restoration normal after deplasmolysis/chilling damage indicated rapid repair lesions. A similar sensitivity low temperatures was found rehydration leaf desiccation, again causing high rates. It is suggested that interfere expansion, possibly lowering elasticity and hindering incorporation lipid material into expanding membrane. expansion tissues at may cause lesions cellular membranes, contributing injury.