Dynamic changes of phenolic compound contents in leaf and bark of poplar during autumn temperature drop  

作　　者：LI Chun-ming WANG Yang YU Wen-xi 

机构地区：[1]National Engineering Laboratory for Tree Breeding （Beijing Forestry University）, Beijing 100083 P. R. China [2]Forestry Research Institutionof Heilongjiang Province, Harbin 150081, E R. China. [3]Northeast Forestry University, Harbin 150040, P. R. China [4]Heilingjiang Academy of Forestry, Harbin 150081, P. R. China

出　　处：《Journal of Forestry Research》2011年第3期481-485,共5页林业研究（英文版）

基　　金：supported by Special Fund of Forestry Industrial Research for Public Welfare of China(201004040);Scientific and Technological Project in Heilongjiang Province(GA09B202-02)

摘　　要：We investigated seasonal dynamics of phenolics substance in leaf and bark of two cultivars of poplar, Populus alba×berolinensis and P. בZhonglin Sanbei 1’, during autumn temperature drop for analyzing the roles of phenolic secondary metabolites in cold resistance. Results show that the contents of condensed tannin and flavonoid in poplar leaf and the flavonoid contents in bark of P. בZhonglin Sanbei 1’ were increased with the decrease of autumn minimum temperature, showing a significantly negative correlation between the contents of soluble phenolic substance in the leaves and changeable temperature. In contrast, lignin content in the poplar leaves is decreased in the process of temperature drop, showing a significantly positive correlation. These results indicate that the variation in phenolic substance has a close correlation with its cold-resistance during the autumn temperature drop.We investigated seasonal dynamics of phenolics substance in leaf and bark of two cultivars of poplar, Populus alba×berolinensis and P. בZhonglin Sanbei 1’, during autumn temperature drop for analyzing the roles of phenolic secondary metabolites in cold resistance. Results show that the contents of condensed tannin and flavonoid in poplar leaf and the flavonoid contents in bark of P. בZhonglin Sanbei 1’ were increased with the decrease of autumn minimum temperature, showing a significantly negative correlation between the contents of soluble phenolic substance in the leaves and changeable temperature. In contrast, lignin content in the poplar leaves is decreased in the process of temperature drop, showing a significantly positive correlation. These results indicate that the variation in phenolic substance has a close correlation with its cold-resistance during the autumn temperature drop.

关 键 词：POPLAR natural temperature drop condensed tannin flavonoid LIGNIN 

分 类 号：S157.1[农业科学—土壤学] TU991.21[农业科学—农业基础科学]