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- Title
Accumulation of 9- and 13-KODEs in response to jasmonic acid treatment and pathogenic infection in rice.
- Authors
Sayaka NISHIGUCHI; Koichi MURATA; Naoki UBE; Kotomi UENO; Shin-ichi TEBAYASHI; Masayoshi TERAISHI; Yutaka OKUMOTO; Naoki MORI; Atsushi ISHIHARA
- Abstract
The inducible metabolites in rice leaves treated with 1 mM jasmonic acid (JA) were analyzed using HPLC. We detected an increase in the levels of two compounds, 1 and 2. Based on the comparison with mass spectra and chromatographic behavior with authentic compounds, 1 and 2 were identified as 13-oxooctadeca-9,11-dienoic acid (13-KODE) and 9-oxooctadeca-10,12- dienoic acid (9-KODE), respectively, which have not been detected in rice to date. The accumulation of these compounds was also induced by an infection by Bipolaris oryzae. Treatment of rice leaves with KODEs induced the accumulation of defensive secondary metabolites, sakuranetin, naringenin, and serotonin, suggesting that KODEs may play a role in the elicitation of defense responses. The compounds that have an á, â-unsaturated carbonyl group similar to KODEs did not reproduce the response of accumulation of defensive secondary metabolites, suggesting that additional structural factors such as long hydrophobic carbon chain are needed to elicit defense responses.
- Subjects
JASMONIC acid; RICE; OXYLIPINS; PHYTOALEXINS; HIGH performance liquid chromatography
- Publication
Journal of Pesticide Science, 2018, Vol 43, Issue 3, p191
- ISSN
1348-589X
- Publication type
Article
- DOI
10.1584/jpestics.D18-022