[Physiological characteristics of resistance of different plum varieties to artificial adverse environments].

The relative electric conductivity, soluble sugar content in leaf, and POD activity of 17 plum varieties, which belong to six species and one genera, were measured under artificial adverse environments. The results showed that there were extreme significant negative correlation (alpha = 0.01) between soluble sugar content and membrane freezing damage, and significant negative correlation (alpha = 0.05) between POD activity in bark and leaf cell heat damage. According to Fuzzy synthetic evaluation, the comprehensive resistances of different plum varieties to adverse circumstances were discussed in this paper.