Physiological and biochemical characteristics of Larix olgensis and L. gmelini seeds under ultra-dry treatment Impact of automobile exhaust on membrane lipid peroxidation and protective enzyme activities in seedlings foliage of four northern broadleaved tree species Study on Physiological Mechanisms of Aeluropus littoralis var. sinensis Debeaux to Salt Resistance Effect of High Temperature Stress on Electrical Impedance Spectroscopy Parameters of Chrysanthemum Effects of Soil Water Content on the Physiological and Biochemical Characteristics in Elaeagnus mollis Diels Seedlings Study on the drought-resistant identification indexes in maize Relationship between Canker-tolerance and Spring-freezing Tolerance of Poplar Clones