Journal Article

Cerebroside Elicitors Found in Diverse Phytopathogens Activate Defense Responses in Rice Plants

Kenji Umemura, Noriko Ogawa, Toyozo Yamauchi, Michiaki Iwata, Masaru Shimura and Jinichiro Koga

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 41, issue 6, pages 676-683
Published in print June 2000 | ISSN: 0032-0781
Published online June 2000 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/41.6.676
Cerebroside Elicitors Found in Diverse Phytopathogens Activate Defense Responses in Rice Plants

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  • Biochemistry
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Cerebrosides A and C, compounds categorized as glycosphingolipids, were isolated in our previous study from the rice blast fungus (Magnaporthe grisea) as novel elicitors which induce the synthesis of rice phytoalexins. In this paper, these cerebroside elicitors showed phytoalexininducing activity when applied to plants by spray treatment and also induced the expression of pathogenesis-related (PR) proteins in rice leaves. This elicitor activity of the cerebrosides showed the structural specificity as that for the induction of phytoalexins. Ceramides prepared from the cerebrosides by removal of glucose also showed the elicitor activity even in lower level compared to the cerebrosides. In field experiments, the cerebroside elicitors effectively protected rice plants against the rice blast fungus, an economically devastating agent of disease of rice in Japan. The cerebrosides elicitors protected rice plants from other disease as well and were found to occur in a wide range of different phytopathogens, indicating that cerebrosides function as general elicitors in a wide variety of rice-pathogen interactions.

Keywords: Cerebroside; Disease resistance; Elicitor; Magnaporthe grisea; Phytoalexin; Rice

Journal Article.  0 words. 

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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