UV-B induced changes in the secondary metabolites of Morus alba L. leaves

Ultraviolet-B (UV-B) radiation is harmful to plants and human beings. Many secondary metabolites, like flavonoids, alkaloids, and lignin, are UV-B absorbing compounds, which can protect the genetic material of plants. Furthermore, they are active components of herbal drugs. UV-B radiation can activa...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2010-04, Vol.15 (5), p.2980-2993
Main Authors: Gu, Xi-Da, Sun, Ming-Yao, Zhang, Lin, Fu, Hong-Wei, Cui, Lei, Chen, Run-Ze, Zhang, Da-Wei, Tian, Jing-Kui
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - analysis
Benzofurans - analysis
Biomedical engineering
chalcomoracin
Chromatography
Chromatography, High Pressure Liquid - methods
Diels-Alder type adducts
Flavonoids
Medical research
Metabolism
Metabolites
moracin N
Morus - metabolism
Morus - radiation effects
mulberry leaves
Physiology
Plant Leaves - metabolism
Plant Leaves - radiation effects
Staphylococcus infections
Ultraviolet radiation
Ultraviolet Rays
UV radiation
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Summary:Ultraviolet-B (UV-B) radiation is harmful to plants and human beings. Many secondary metabolites, like flavonoids, alkaloids, and lignin, are UV-B absorbing compounds, which can protect the genetic material of plants. Furthermore, they are active components of herbal drugs. UV-B radiation can activate the self-protective secondary metabolism system. The results of this paper provide a method to induce bioactive secondary metabolites from mulberry leaves (Morus alba L.) by UV-B irradiation in vitro. Five significantly different chromatographic peaks were found by HPLC fingerprint after induction, from which two active compounds were identified: One was chalcomoracin, a natural Diels-Alder type adduct with antibacterial activity; the other one was moracin N, which is a precursor of chalcomoracin. Their contents were 0.818 mg/g and 0.352 mg/g by dry weight, respectively.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules15052980