|
|||||
|
|
Enhancement of disease resistance to Magnaporthe grisea in rice by accumulation of hydroxy linoleic acid |
|
| Authors: | Yara Asanori Yaeno Takashi Montillet Jean-Luc Hasegawa Morifumi Seo Shigemi Kusumi Kensuke Iba Koh |
| Institution: | a Department of Biology, Faculty of Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan b CEA, Cadarache, DSV-DEVM, Laboratoire des Échanges Membranaires et Signalisation, 13108 Saint-Paul-Lez Durance Cedex, France c College of Agriculture, Ibaraki University. 3-21-1 Chuo, Ami, Ibaraki 300-0393, Japan d Plant-Microbe Interactions Research Unit, National Institute of Agrobiological Sciences (NIAS), 2-1-2 Kannon-dai, Tsukuba, Ibaraki 305-8602, Japan |
| 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. |
| Keywords: | Antifungal activity Hydroperoxy fatty acid Hydroxy fatty acid Linoleic acid Linolenic acid Magnaporthe grisea Oryza sativa Oxylipin |
| 本文献已被 ScienceDirect PubMed 等数据库收录！ | |