Investigation of the Resistance to Pear Valsa Canker and the Physiological and Biochemical Characteristics in Pyrus Germplasm Effects of salicylic acid on heat resistance of Viola × writtrockiana seedlings Effects of salicylic acid (SA) on high-temperature stress resistance of cucumber seedling Induction and Effects of Elicitor on Camptothecin Content in Camptotheca acuminata Callus Cloning of MdWRKY40b Gene in Fuji Apple and Its Response to Powdery Mildew Stress Differential Expression of SA and H2O2 between Susceptible and Resistant Poplars Challenged by Botryosphaeria dothidea Effect of Exogenous Salicylic Acid on Some Parameters of Cell Membrane in Postharvest Prunus persica Fruits