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Author Yang C., Li W., Cao J., Meng F., Yu Y., Huang J., Jiang L., Liu M., Zhang Z., Chen X., Miyamoto K., Yamane H., Zhang J., Chen S., Liu J.
Title Activation of ethylene signaling pathways enhances disease resistance by regulating ROS and phytoalexin production in rice.
Abstract:
Ethylene plays diverse roles in plant growth, development and stress responses. However, the roles of ethylene signaling in immune responses remain largely unknown. In this study, we showed that the blast fungus Magnaporthe oryzae infection activated ethylene biosynthesis in rice. Resistant rice cultivars accumulated higher levels of ethylene than susceptible ones. Ethylene signaling components OsEIN2 and the downstream transcription factor OsEIL1 positively regulated disease resistance. Mutation of OsEIN2 led to enhanced disease susceptibility. Whole-genome transcription analysis revealed that responsive genes of ethylene, jasmonates (JAs) and reactive oxygen species (ROS) signaling as well as phytoalexin biosynthesis genes were remarkably induced. Transcription of OsrbohA/B, which encode NADPH oxidases, and OsOPRs, the JA biosynthesis genes, were induced by M. oryzae infection. Furthermore, we demonstrated that OsEIL1 binds to the promoters of OsrbohA/OsrbohB and OsOPR4 to activate their expression. These data suggest that OsEIN2-mediated OsrbohA/OsrbohB and OsOPR transcription may play essential roles in ROS generation, JA biosynthesis and the subsequent phytoalexin accumulation. Therefore, the involvement of ethylene signaling in disease resistance is probably by activation of ROS and phytoalexin production in rice during M. oryzae infection. This article is protected by copyright. All rights reserved.
Journal Plant J.
Country China
Volume
Pages
Year 2016
PubMed ID 27701783
PubMed Central ID -
DOI 10.1111/tpj.13388
URL -
Relation
Gene ACS2 EIN2 JAR1 KS7 KS8 OPR4 OPR5 OPR6 PR1A RBOHA RBOHB _
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
-
Stages in Each Organ
- Muant Lines (Gene)
-
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase