The ice nucleation activation bacterial canker disease decreased the content of mobile proline in poplar barks, while caused the content of bark pectin to increase a bit.

• 摘要感染冰核细菌溃疡病的杨树树皮的果胶质含量比健株略高。病株树皮游离脯氨酸含量在总体水平上要低于健株。