Effect of Light Condition on Growth and Alkaloid Production in Japanese Plum-yew

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  • 光条件がイヌガヤの成育とアルカロイド生産におよぼす影響
  • ヒカリ ジョウケン ガ イヌガヤ ノ セイイク ト アルカロイド セイサン ニ オヨボス エイキョウ

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Abstract

The effect of light condition on growth and alkaloid production in the Japanese plum-yew (Cephalotaxus harringtonia), whose natural habitat includes Numazu and Fuji-gun, Shizuoka Prefecture, was analyzed. Japanese plum-yew trees commonly grow in low light intensity conditions and the intensity is mostly less than 20％ of direct solar radiation. The growth of the trees in height and diameter seems to be positively correlated with light intensity; homoharringtonine (HHT) was abundant in the Fuji-gun trees, which were grown under relatively low light intensity, whereas the content of harringtonine (HT) was abundant in the Numazu trees, which were grown under relatively high light intensity. Involvement of light condition on alkaloid composition was further analyzed using Japanese plum-yew trees grown under high light intensity in Numazu. The results revealed that HT was abundant in branches exposed to high light intensity, whereas HHT was abundant in branches of trees grown in shaded areas with low light intensity.

Journal

  • Shokubutsu Kankyo Kogaku

    Shokubutsu Kankyo Kogaku 26 (1), 25-29, 2014

    Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

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