Enhancement of disease resistance to Magnaporthe grisea in rice by accumulation of hydroxy linoleic acid

Asanori Yara, Takashi Yaeno, Jean Luc Montillet, Morifumi Hasegawa, Shigemi Seo, Kensuke Kusumi, Koh Iba

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Linoleic acid (18:2) and linolenic acid (18:3) are sources for various oxidized metabolites called oxylipins, some of which inhibit growth of fungal pathogens. In a previous study, we found disease resistance to rice blast fungus Magnaporthe grisea enhanced in 18:2-accumulating transgenic rice (F78Ri) in which the conversion from 18:2 to 18:3 was suppressed. Here, we demonstrate that 18:2-derived hydroperoxides and hydroxides (HPODEs and HODEs, respectively) inhibit growth of M. grisea more strongly than their 18:3-derived counterparts. Furthermore, in F78Ri plants, the endogenous levels of HPODEs and HODEs increased significantly, compared with wild-type plants. These results suggest that the increased accumulation of antifungal oxylipins, such as HPODEs and HODEs, causes the enhancement of disease resistance against M. grisea.

Original languageEnglish
Pages (from-to)344-347
Number of pages4
JournalBiochemical and Biophysical Research Communications
Volume370
Issue number2
DOIs
Publication statusPublished - May 30 2008

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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