期刊
MOLECULAR PLANT-MICROBE INTERACTIONS
卷 23, 期 12, 页码 1573-1583出版社
AMER PHYTOPATHOLOGICAL SOC
DOI: 10.1094/MPMI-05-10-0106
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资金
- IOS [0419648]
- National Science Foundation [MCB 0715951, IOS 0923960]
- Department of Energy Biosciences [DE FG02 05ER15670]
- National Institutes of Health [1R01AI069146 01A2]
- University of Minnesota
- Japan Society for the Promotion of Science
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [0923960] Funding Source: National Science Foundation
- Direct For Biological Sciences
- Div Of Molecular and Cellular Bioscience [0918908] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-FG02-05ER15670] Funding Source: U.S. Department of Energy (DOE)
RNA-bmdmg proteins (RBP) can control gene expression at both transcriptional and post-transcriptional levels Plants respond to pathogen infection with rapid reprogramming of gene expression However, little is known about how plant RBP function in plant immunity Here, we describe the involvement of an RBP, Arabidopsis thaliana RNA-bind mg protein-defense related 1 (AtRBP-DR1, At4g03110), in resistance to the pathogen Pseudomonas syringae pv tomato DC3000 AtRBP-DR1 loss of function mutants showed enhanced susceptibility to P syringae pv tomato DC3000 Overexpression of AtRBP-DR1 led to enhanced resistance to P syringae pv tomato DC3000 strains and dwarfism The hypersensitive response triggered by P syringae pv tomato DC3000 avrRpt2 was compromised in the Atrbp-dr1 mutant and enhanced in the AtRBP-DR1 overexpression line at early time points AtRBP-DR1 overexpression lines showed higher mRNA levels of SID2 and PR1, which are salicylic acid (SA) inducible, as well as spontaneous cell death in mature leaves Consistent with these observations, the SA level was low in the Atrbp-dr1 mutant but high in the overexpression line The SA-related phenotype in the overexpression line was fully dependent on SID2 Thus, AtRBP-DR1 is a positive regulator of SA-mediated immunity, possibly acting on SA signaling-related genes at a post-transcriptional level
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