Study on the Relationship between Degree of Salurated Fatty Acid in Cell Membrane and Drought Resistant of Paulownia

Fatty acid components in cell membrane in paulownia mainly include:palmitic acid, linoleic acid, flax acid(about 87% of total fatty acid) and some palmmoleic acid, stearic acid and oleic acid. DSFA was decreased by watering when there is light water stress in soil.And the DSFA is decreased by 2.04% when soil potential increased from -2.0 bar to -0.5 bar.The DSFA difference existed in the membrane between sensitive species and drought resistant species, and there is a slight difference in content of stearic acid and oil acid. DSFA is positively related with Mrc, and nagativly with SDW and Pm.