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福建柏抗寒生理指标变化研究
引用本文:何开跃,李晓储,黄利斌,杨宗武,严洪真.福建柏抗寒生理指标变化研究[J].南京林业大学学报(自然科学版),2002,26(5):10-14.
作者姓名:何开跃  李晓储  黄利斌  杨宗武  严洪真
作者单位:1. 南京林业大学,江苏,南京,210037
2. 江苏省林业科学研究院,江苏,南京,211153
3. 福建省林业科学研究院,福建,福州,350012
基金项目:国家“九五”科技攻关项目“福建柏珍贵建筑材料树种良种选育及培育技术”内容之一
摘    要: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24h情况下,植株体内内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24h时均升高,但在处理48h、72h时叶绿素含量明显下降;脯氨酸含量在处理72h时明显升高。可溶性糖含量在处理48h和72h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℃ 24h自然低温条件下,2生福建柏苗仅出现少量侧枝顶端鳞叶轻微受冻;-8℃持续48h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72h,-15℃处理48h和72h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。

关 键 词:福建柏  抗寒生理指标  冻害  低温胁迫

A Study on Variations of Physiological Indices of Cold Resistance in Fukiencypress
HE Kai yue ,LI Xiao chu ,HUANG Li bin ,YANG Zong wu ,YAN Hong zhen.A Study on Variations of Physiological Indices of Cold Resistance in Fukiencypress[J].Journal of Nanjing Forestry University(Natural Sciences ),2002,26(5):10-14.
Authors:HE Kai yue  LI Xiao chu  HUANG Li bin  YANG Zong wu  YAN Hong zhen
Institution:HE Kai yue 1,LI Xiao chu 2,HUANG Li bin 2,YANG Zong wu 3,YAN Hong zhen 1
Abstract: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
Keywords:Fukiencypress  Freeze injury  Physiological indices of cold resistance
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