The rate of electrolyte seepage was smaller.Dissolubility sugar and proline content increased.These all strengthened the regulating ability of penetration, raised the anti-cold ability of the plant.

• 渗透调节物质可溶性糖、脯氨酸含量大幅度提高，增强了细胞的渗透调节能力，增加了植物组织束缚水的含量，由于增强了持水力，降低了冰点，从而提高了植株的抗冷性。