Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1935776 | Biochemical and Biophysical Research Communications | 2008 | 4 Pages |
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.
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Authors
Asanori Yara, Takashi Yaeno, Jean-Luc Montillet, Morifumi Hasegawa, Shigemi Seo, Kensuke Kusumi, Koh Iba,