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以10个种源1年生香椿实生苗为试材,研究了不同低温处理对其茎部的含水量、自由水含量、束缚水含量、自由水/束缚水比值等水分状态及可溶性糖、脯氨酸等渗透调节物质含量的影响。结果表明:5~-5℃范围内,茎部含水量、自由水含量、自由水/束缚水比值逐渐降低;束缚水含量、可溶性糖含量、脯氨酸含量逐渐升高,不同种源各试验指标含量与其低温半致死温度呈现显著或极显著负相关关系。
Ten-year-old toon seedlings of 10 provenances were used as experimental materials to study the effect of different low temperature treatments on their water content, free water content, irreducible water content, free water / irreducible water ratio, soluble sugar and proline Effect of acid and other osmotic adjustment substances. The results showed that the water content, free water content and free water / irreducible water ratio gradually decreased in the range of 5 ℃ to -5 ℃. The bound water content, soluble sugar content and proline content gradually increased. The index content showed a significant or extremely significant negative correlation with the lethal temperature at low temperature.