Journal Article

Elicitor Activity of Cerebroside, a Sphingolipid Elicitor, in Cell Suspension Cultures of Rice

Kenji Umemura, Noriko Ogawa, Jinichiro Koga, Michiaki Iwata and Hideki Usami

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 43, issue 7, pages 778-784
Published in print July 2002 | ISSN: 0032-0781
Published online July 2002 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcf090
Elicitor Activity of Cerebroside, a Sphingolipid Elicitor, in Cell Suspension Cultures of Rice

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

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Cerebrosides, compounds categorized as glycosphingolipids, were found to occur in a wide range of phytopathogens as novel elicitors and to induce the effective disease resistance for rice plants in our previous study. Here, we showed that cerebroside elicitors lead to the accumulation of phytoalexins and pathogenesis-related (PR) protein in cell suspension cultures of rice with the structural specificity similar to that for the rice whole plants. This elicitor activity of the cerebroside was greater than jasmonic acid (JA) and chitin oligomer (which is known to be an elicitor for cell suspension cultures of rice). Treatment of cell suspension cultures with cerebroside and chitin oligomer resulted in a synergetic induction of phytoalexins, suggesting that cerebroside and carbohydrate elicitors, such as glucan and chitin elicitor, enhance the defense signals of rice in vivo. Induction of phytoalexins by the treatment with cerebroside elicitor was markedly inhibited by LaCl3 and GdCl3, Ca2+ channel blockers. It is possible that Ca2+ may be involved in the signaling pathway of elicitor activity of cerebroside.

Keywords: Keywords: Ca2+ — Cerebroside — Hypersensitive response — Oligosaccharide elicitor — Signal transduction — Sphingolipid.; Abbreviations: Ca2+, calcium ion; GlcCer, glucocerebroside; HR, hypersensitive response; JA, jasmonic acid; PR, pathogenesis-related.

Journal Article.  4171 words.  Illustrated.

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

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