对福建柏1～2年生苗木进行-8℃,-15℃低温胁迫处理试验测定表明,在处理24h情况下,植株体内叶绿素和脯氨酸的含量比对照(自然低温-4℃)都有所升高,而根活力指标均有所降低;且种源间差异明显:叶绿素和脯氨酸含量的增加率为仙游和南靖种源均大于德化种源;根活力指标的降低率为仙游＜南靖＜德化.对仙游种源2年生苗木低温处理试验测定表明,叶绿素和脯氨酸含量在处理24h时均升高,但在处理48h、72h时叶绿素含量明显下降;脯氨酸含量在处理72h时明显升高.可溶性糖含量在处理48h和72h后有所升高.MDA含量在冷冻处理时均升高,田间同步观测表明,在-7℃ 24h自然低温条件下,2年生福建柏苗仅出现少量侧枝顶端鳞叶轻微受冻;-8℃持续48h自然低温,则出现中度冻害(多数苗木未见顶梢受冻);而经-8℃处理72h,-15℃处理48h和72h的苗木绝大多数冻死.低温处理福建柏叶绿素、脯氨酸和根活力指标的变化是植株适应不利气温的生理机制调节反应.利用低温胁迫处理后上述生理指标的变化,可以寻求评估耐寒种源的途径,并为北移引种提供科学实验依据.“,”The results of the low-temperature(-8℃,-15℃)treatment of the 1～2a seedlings of Fukiencypress demonstrated that,when treated for 24 hours,the contents of chlorophyll and proline in plants increased in comparison with the control of natural low temperature at -4℃ with the root vitality decreasing.Moreover,the differences among provenance were quite marked.The increase ratios in chlorophyll and proline were that the provenance of Xianyou and Nanjing were higher than that of Dehua while the decrease ratios in root vitality were Xianyou