Dynamic feature of flavonoids content in different organs of larch (Larix gmelinii)

编号 zgly0000361544

文献类型 期刊论文

文献题名 Dynamic feature of flavonoids content in different organs of larch (Larix gmelinii)

学科分类 220.99;林学其他学科

作者 WANGWen-jie  LIXue-ying  ZUYuan-gang 

作者单位 KeyLaboratoryofForestPlantEcology  NortheastForestryUniversityHarbin150040  P.R.China 

母体文献 Journal of Forestry Research;林业研究: 英文版 

年卷期 2005,16(2)

页码 89-92

年份 2005 

分类号 S791.222 

关键词 兴安落叶松  黄酮  含量  动态变化  树皮  针叶  枝条  茎木质部 

文摘内容 Flavonoids in plants is very important in its ecological role and economic value. The dynamic features of flavonoids content in different organs of larch (Larix gmelinii) at different light and temperature conditions were investigated in this study. Results showed that the order of flavonoids content in different organs from high to low was 7.78% (stem bark) > 2.79% (leaves) > 1.72% (branches) > 1.19% (stem xylem)and different organs had a great seasonal variation in flavonoids content, but the change of flavonoids content at different temperature was not obvious in different organs., The content of flavonoids in barck had, a positive correlation with temperature (R^2=0.75), but that in other organs had slight variation with the change of temperatures. For all the tested organs, the flavonoids content in summer and autumn was approximately 3-4 times higher than in spring and winter. This is attributed to the great stress from environmental physical variables such as UV radiation, high temperature that induce the accumulation of flavonoids. The flavonoid content of sun leaves was evidently higher than that of shade leaves, and leaves at upper part of canopy had a higher flavonoids content compared with that at other parts. This result indicates that sun radiation could improve flavonoids production in leaves (R^2=0.76). The flavonoids may actively evolve in plant defenses to environmental stress, protecting larch from the damage of high temperature and radiation, and its main function is different in different organs。