Mea surement of Cold Tolerance Ba sed on REC and the Log istic Equa tion inCam ellia h iem a lis ‘Shishi Ga shira’ Acquirement of Chilling Tolerant Mutant by Somatic Screening of Low Temperature in Sea Dallisgrass(Paspalum vaginatum. Sw.) Semilethal Temperature of Fingered Citrons(Citrus medica var. sarcodactylis Swingle) under Low Temperature Stress and Evaluation on Their Cold Resistance Evaluation of Cold Resistance of Different Types of Magnolia grandiflora Adaptation of Gardenia jasminoides leaves to natural temperature reduction Preliminary Study on the Relations between Membrane Permeability, Endogenous Hormones and Cold Resistance of Ivy The Relation Between the Membrane Protective System and Semilethal Temperature of Gardenia jasminoides Ellis Leaves as Temperature Fell Changing Regularity Analysis of Cold-resistant Physiology Targets about Parthenocissus Plants