Mode of action of oryzalexin D against Pyricularia oryzae.

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概要

• 論文の詳細を見る

• The effect of oryzalexin D, which has been isolated as a group of novel phytoalexins of rice plant, on DNA, RNA, protein, lipid and chitin biosyntheses, respiration and cell membrane permeability was investigated in Pyricularia oryzae. The concentration for 50% inhibition (ED50) by oryzalexin D of the mycelial growth of P. oryzae was 230 ppm. At this concentration, oryzalexin D inhibited equally the incorporation of [2-14C]thymidine, [2-14C]uridine, L-[U-14C]amino acid mixture, L-[methyl-14C]methionine and D-[1-14C]glucosamine into DNA, RNA, protein, lipid and chitin in intact cells, but did not inhibit these systems in a homogenate of the mycelia of P. oryzae. Oryzalexin D scarcely inhibited the respiration of the homogenate and mitochondria at ED50. On the other hand, oryzalexin D at ED50 caused leakage of potassium and inhibited the uptake of glutamate by mycelial cells of P. oryzae. These results suggest that interference with the cell membrane function is responsible for the primary mode of action of oryzalexin D against P. oryzae.

• 公益社団法人 日本農芸化学会の論文

著者

• AKATSUKA Tadami

  Laboratory of Agricultural Chemicals, Faculty of Agriculture, Ibaraki University

関連論文

• Purification and Chemical Properties of an Inhibitor of Plant Virus Infection from Fruiting Bodies of Lentinus edodes(Biological Chemistry)
• Oryzalexin S, a Novel Stemarane-type Diterpene Rice Phytoalexin
• Role of Oxygenated Fatty Acids in Rice Phytoalexin Production(Pesticide Chemistry)
• Absolute Configuration of Oryzalexin A and Structures of Its Related Phytoalexins Isolated from Rice Blast Leaves Infected with Pyricularia oryzae
• Mode of action of oryzalexin D against Pyricularia oryzae.

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