The Adaptive Changes of Membrane Fatty Acid Composition and Membrane Protective System of Gordonia acuminata Accompanied with the Temperature Decrease STUDIES ON THE FATTY ACIDS COMPOSITION OF THE CITRUS CELL MEMBRANE AND ITS RELATIONSHIP WITH THE COLD RESISTANCE Influences of High Temperature and Low Humidity on the Fatty Acid Compositions of Membane Lipids in Wheat Heat Stress Effects on Osmotic Potential , Membrane Fatty Acid Composition and Lipid Peroxidation Content of Two Kentucky Bluegrass Cultivars Differing in Drought Tolerance Heat Stress Effects on Osmotic Potential , Membrane Fatty Acid Composition and Lipid Peroxidation Content of Two Kentucky Bluegrass Cultivars Differing in Drought Tolerance