Cultivation of <i>Lithospermum erythrorhizon</i> in Semi-Mountainous Areas of Kyushu Island (1) Effects of Rain Shelter and Plastic Mulch Cultivation on the Growth and Content of Components

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  • Atsumi Toshiyuki
    Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences, Kyushu University of Health and Welfare
  • Ichimasa Erina
    Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences, Kyushu University of Health and Welfare
  • Kubota Mai
    Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences, Kyushu University of Health and Welfare
  • Ohtsuka Isao
    Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences, Kyushu University of Health and Welfare
  • Kakiuchi Nobuko
    Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences, Kyushu University of Health and Welfare

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Other Title
  • 九州の中山間地域におけるムラサキ (<i>Lithospermum erythrorhizon</i>) 栽培（1）雨よけおよびビニルマルチの生育および成分含量への効果
  • 原報 九州の中山間地域におけるムラサキ(Lithospermum erythrorhizon)栽培(1)雨よけおよびビニルマルチの生育および成分含量への効果
  • ゲンポウ キュウシュウ ノ ナカヤマ カン チイキ ニ オケル ムラサキ(Lithospermum erythrorhizon)サイバイ(1)アマヨケ オヨビ ビニルマルチ ノ セイイク オヨビ セイブン ガンリョウ エ ノ コウカ

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Abstract

<p>Lithospermi Radix, the dried root of Lithospermum erythrorhizon, is an important pharmacopoeial crude drug and is traditionally used as a purple dye. The plant is currently cultivated in the northern part of Japan, for a stable supply. However, the lower survival rate of cultivated plants and their lower content of naphtoquinone (shikonin) derivatives than those of wild plants are vital issues that need to be resolved. In the present study, we established experimental cultivation plots in Taketa City, a typical semi-mountainous area in Oita Prefecture. Four test areas, in a rain shelter or open field (S or O area) in the presence or absence of plastic mulch (M or MN area), were examined. Plants seedlings were cultivated between March and December. After the harvest, shoot length, stem diameter, the numbers of aerial branches and underground parts, and root length were measured. In a quality evaluation, diethyl ether-soluble extract and shikonin derivative contents were analyzed. The aerial parts of plants cultivated in the S area as well as the underground parts of plants cultivated in the M area were significantly larger in size. The yield of diethyl ether extract and shikonin derivative contents from Lithospermi Radix prepared from plants cultivated in the S area were significantly higher than from those in the O area. In conclusion, cultivation using rain shelter and plastic mulch was beneficial for growth and shikonin derivative contents in plants.</p>

Journal

  • Shoyakugaku Zasshi

    Shoyakugaku Zasshi 71 (2), 71-77, 2017-08-20

    The Japanese Society of Pharmacognosy

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