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Comparison in Contents of Polyphenol and Flavonoid in Leaves of Eucommia ulmoides Germplasm

  • Received Date: 2015-12-08
  • [Objective] To compare the content difference of polyphenol and flavonoid in Eucommia ulmoides leaves, so as to evaluate and utilize E. ulmoides germplasm reasonably. [Method] HPLC and spectrophotometric methods were used to measure the contents of polyphenol, total flavonoid, isoquercitrin and quercetin of 105 E. ulmoides germplasm. [Result] The mean content of quercetin was 0.33 mg·g-1 with the highest variation coefficient of 42.42%, while the mean content of total flavonoid was 15.92 mg·g-1 with the lowest variation coefficient of 19.35%; the mean content of isoquercitrin, total polyphenol was 3.37 mg·g-1 and 42.74 mg·g-1, respectively, with the variation coefficient of 34.42% and 23.72%. No significant correlation was found in the contents of these four components between male and female plant leaves. There was highly significant difference in the four components among different regions (PE. ulmoides germplasm resources could be divided into four groups according to the content difference of the four components, in which the contents of flavonoid compounds and polyphenol in group Ⅲ including 13 materials were higher than that of the other groups. [Conclusion] The contents of polyphenol and flavonoid in leaves of E. ulmoides were high and abundant diversity and variation were found in different germplasms, which showed great potential for selection and improvement. Thus, it could provide basis materials for breeding Eucommia ulmoides germplasm.
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Comparison in Contents of Polyphenol and Flavonoid in Leaves of Eucommia ulmoides Germplasm

  • 1. Non-timber Forest Research and Development Center of Chinese Academy of Forestry, the Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, He'nan, China

Abstract: [Objective] To compare the content difference of polyphenol and flavonoid in Eucommia ulmoides leaves, so as to evaluate and utilize E. ulmoides germplasm reasonably. [Method] HPLC and spectrophotometric methods were used to measure the contents of polyphenol, total flavonoid, isoquercitrin and quercetin of 105 E. ulmoides germplasm. [Result] The mean content of quercetin was 0.33 mg·g-1 with the highest variation coefficient of 42.42%, while the mean content of total flavonoid was 15.92 mg·g-1 with the lowest variation coefficient of 19.35%; the mean content of isoquercitrin, total polyphenol was 3.37 mg·g-1 and 42.74 mg·g-1, respectively, with the variation coefficient of 34.42% and 23.72%. No significant correlation was found in the contents of these four components between male and female plant leaves. There was highly significant difference in the four components among different regions (PE. ulmoides germplasm resources could be divided into four groups according to the content difference of the four components, in which the contents of flavonoid compounds and polyphenol in group Ⅲ including 13 materials were higher than that of the other groups. [Conclusion] The contents of polyphenol and flavonoid in leaves of E. ulmoides were high and abundant diversity and variation were found in different germplasms, which showed great potential for selection and improvement. Thus, it could provide basis materials for breeding Eucommia ulmoides germplasm.

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