[Objective] Effects of SA on pollen tube growth and flower senescence were studied.[Method] Taking the Yali pear pollen and flower as the materials,effects of SA on pollen germination,pollen tube growth and flowering stage of Yali pear inflorescence were conducted.[Result] 0.002 and 0.02 mmol/L SA promoted the germination of pollen,but the pollen germination rate in treatment with 0.2 mmol/L SA was significantly lower than that of control.Pollen tube under 0.002 mmol/L SA treatment was significantly higher ...