環境ストレスに対するミシマサイコの発育応答とその制御(II) : 乾燥ストレスに対するロゼット株と抽だい株の感受性の比較

概要

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To study the effects of dry stress on rosette and bolting plants, 7-month-old rosette and bolting plants of Bupleurum falcatum were subjected to dry stress by keeping them in dry soil conditions near the parmanent wilting point for one month, starting two months before the sampling time. The treatment decreased the dried weight of the total aerial parts of the rosette plants significantly, but caused no significant inhibition of the growth of root of both rosette and bolting plants. The dry stress caused significant changes in the histological characteristics and the saikosaponin contents (%DW) in the main root of the bolting plants. Other changes observed were as follows: dry stress developed a cork layer, and inhibited the lignification of the xylem tissues in the main roots of bolting plants. The saikosaponin contents (%DW) in the cork layer and the neighbouring tissues were significantly increased by the dry stress.
日本生薬学会の論文
1995-12-20