Oxygenated Fatty Acids with Anti-rice Blast Fungus Activity in Rice Plants

• Published in: Bioscience, biotechnology, and biochemistry Vol. 57; no. 2; pp. 283 - 287
• Main Authors: Kato, Tadahiro, Yamaguchi, Yoshihiro, Namai, Tsuneo, Hirukawa, Toshifumi
• Format: Journal Article
• Language: English
• Published: Tokyo Taylor & Francis 1993; Japan Society for Bioscience Biotechnology and Agrochemistry; Oxford University Press
• Subjects: Agronomy. Soil science and plant productions; Analytical, structural and metabolic biochemistry; Biological and medical sciences; Fatty acids; Fundamental and applied biological sciences. Psychology; Fungal plant pathogens; Lipids; Oryza sativa; Other biological molecules; Pathology, epidemiology, host-fungus relationships. Damages, economic importance; Phytopathology. Animal pests. Plant and forest protection; Pyricularia oryzae; Monocotyledones; Vegetals; Biochemical analysis; Biochemical compound; Chemical structure; Fatty acids; Cereal crop; Fungus resistance; Biological compound; Oryza sativa; Sensitivity resistance; Gramineae; Angiospermae; Plant origin; Chemical composition; Spermatophyta; Cultivar
• ISSN: 0916-8451; 1347-6947
• DOI: 10.1271/bbb.57.283

Expecting that the different characteristics of rice plants against rice blast fungus, that is, susceptibility of the weaker cultivar, Sasanishiki and resistance of the stronger cultivars, Fukuyuki and Fukunishiki, may be due to the absence or presence of anti-fungus compounds in the rice plants, the anti-rice blast fungus substances in these three kinds of rice plants were explored. We found five epoxides and five allyl alcohols as anti-rice blast fungus compounds. The epoxides were 12,13-epoxy- and 9,10-epoxylinoleic acids, and 15,16-epoxy-, 12,13-epoxy-, and 9,10-epoxylinolenic acids. The allyl alcohols are 13-hydroxy and 9-hydroxy linoleic acids, and 16-hydroxy, 13-hydroxy, and 9-hydroxy linolenic acids. In inoculated Sasanishiki, the activity is due to the formation of the allyl alcohols.