イネいもち病菌体中に存在するイネ体内 peroxidase 誘導物質

概要

論文の詳細を見る
The peroxidase inducers, which have the ability to induce the peroxidase production in leaf tissue of rice plant, were isolated from the homogenate of conidia and mycelia of rice blast fungus (Pyricularia oryzae Cavara). On polyacrylamide gel electrophoregram, the isozyme profile of peroxidases of rice leaf treated with the homogenate of blast fungus was similar to the one of rice leaf inoculated with the pathogen. The augmentation of peroxidase in rice plant by the application of inducers was inhibited in the presence of metabolic inhibitors such as formycin A, cycloheximide and blasticidin S. Three and two inducers were separated respectively from the supernatant of conidial and mycelial homogenates by molecular sieving chromatogram. Molecular weights of the inducers separated from the conidial homogenate were estimated to be approximately 700 (C I), 10,000 (C II) and 70,000 (or > 70,000, C III) daltons by Sephadex G-50 gel-filtration using dextrans and other authentic sugars as standards. Two inducers separated from the mycelial homogenate, M I and M II, were eluted in the similar fractions to C I and C III respectively. Crude inducers showed the inductive activity when applied at a concentration lower than 312.5 ng per injured spot (2 mm in diameter). It was suggested from these results that the rice plant might recognize the pathogen by means of the substances such as the peroxidase inducers which were produced by the pathogen. It is also worthwhile to investigate further these peroxidase inducers may act as inducer of disease resistance reaction in host plant or not, because many reports described the positive correlation between the augmentation of peroxidase activity and elevation of disease resistance in host plant.
日本植物病理学会の論文
1982-07-25

イネいもち病菌体中に存在するイネ体内 peroxidase 誘導物質

スポンサーリンク

概要

著者

関連論文

スポンサーリンク