Supplementary Ultraviolet Radiation B Together with Blue Light at Night Increased Quercetin Content and Flavonol Synthase Gene Expression in Leaf Lettuce (Lactuca sativa L.)

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Establishment of an effective supplementary lighting procedure is necessary to increase the value of leaf lettuce grown using a hydroponic method involving a low production cost. In leaf lettuce extracts, quercetin, one of the flavonoids, was isolated and identified. It was investigated that quercetin has important functions that can be used as a dietary supplement. Flavonol synthase (FLS) is a key enzyme involved in quercetin biosynthesis, catalyzes the conversion of dihydroquercetin to quercetin. Therefore, we determined the sequence of the flavonol synthase gene (<I>FLS</I>) in red leaf lettuce. We harvested leaf lettuce grown using supplementary light sources, such as ultraviolet radiation B (UV-B), ultraviolet radiation A, blue, and red lamps during the night. It is noteworthy that <I>FLS</I> expression and the quercetin content were particularly increased to a greater extent in young leaves than in mature leaves when UV-B and blue light were used simultaneously at night. We suggest that UV-B with blue light is used simultaneously at night for producing leaf lettuce with high quercetin content.

収録刊行物

  • Environment control in biology  

    Environment control in biology 46(1), 1-11, 2008-03-30 

    Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

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各種コード

  • NII論文ID(NAID)
    10021229337
  • NII書誌ID(NCID)
    AA12029220
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    1880554X
  • NDL 記事登録ID
    9478954
  • NDL 雑誌分類
    ZR1(科学技術--生物学)
  • NDL 請求記号
    Z78-A361
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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