無機栄養分がミシマサイコの生育およびsaikosaponin類の含有率に及ぼす影響について(第1報) : 窒素,リン酸,カリウムの施与量が1年生ミシマサイコの生育およびsaikosaponin類の含有率に及ぼす影響について

概要

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The effects of 3 mineral fertilizers whose major components were nitrogen (N), phosphoric acid (P) and potassium (K) respectively, on the growth and the saikosaponin a, c and d (sa, sc and sd) contents (% dry weight) of Bupleurum falcatum cultivated in pots were studied. When these 3 fertilizers were applied in combination, as the application level was increased, the whole dried root weight and the sa, sc and sd contents (mg/root) tended to decrease markedly, but the aerial parts were not significantly affected. When applied singly, higher application levels of N fertilizer decreased the rates of bolting, the dried weight of aerial parts and roots and saikosaponins contents (%DW) and higher application levels of P fertilizer increased the rate of bolting, the dried weight of aerial parts and roots and the production of saikosaponins (mg/root), especially of sa and sd. However, when applied singly, K fertilizer gave no effect on the growths of aerial and root parts and slightly increased the saikosaponin contents (%DW) because all the plants were the rosette plants. In all the test groups, the ratios between sa, sc and sd (%) in the main root, lateral root and rootlet, were affected by the application levels and types of the mineral fertilizers.
日本生薬学会の論文
1995-09-20