Exogenous EBR mediated the plant growth and absorption and accumulation of Cu, Fe and Zn in tomato seedlings under Cu stress Effects of Cu2+and Zn2+ Stress on the Bulbil Germination and Physiological-biochemical Characteristics of Polygonum viviparum Effects of exogenous pb and cu stress on eco-physiological characteristics on foxtail millet seedlings of different genotypes Effect of Salicylic Acid on Growth and Nutrient Uptake in Hydroponic Tobacco under Cu Stress