The results of the semilethal temperature test showed that:In sudden cold resistance process,the physiological and biochemical indexes of Ficus concirma var.subsessilis at four different ages were in a consistent performance.As the temperature decreased,the membrane permeability of leaves,the relative electric conductivity,the content of MDA and free proline increased, while the SOD activity,the content of soluble suger and protein rised at first and lowered later,and the POD activity decreased at first and...