Journal
PLANTA
Volume 238, Issue 6, Pages 1113-1124Publisher
SPRINGER
DOI: 10.1007/s00425-013-1956-3
Keywords
Capsicum annuum; Osmotin-like protein; Pathogens; Cell death; Defense response; Virus-induced gene silencing; Transgenic Arabidopsis
Categories
Funding
- Plant Molecular Breeding Center [PJ008027]
- Agricultural Genome Center [PJ008211]
- Rural Development Administration, Republic of Korea
- Next Generation BioGreen21 Program
- Rural Development Administration (RDA), Republic of Korea [PJ008211012013] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Osmotin or osmotin-like protein, a PR-5 family member, is differentially induced in plants by abiotic and biotic stresses. Here, we demonstrate that the pepper (Capsicum annuum) osmotin-like protein 1 gene, CaOSM1, was required for the defense and hypersensitive cell death response and oxidative burst signaling during Xanthomonas campestris pv. vesicatoria (Xcv) infection. CaOSM1 protein was localized to the plasma membrane in leaf cells of Nicotiana benthamiana. Agrobacterium-mediated transient expression of CaOSM1 in pepper distinctly induced the hypersensitive cell death response and H2O2 accumulation. Knock-down of CaOSM1 in pepper by virus-induced gene silencing increased the susceptibility to Xcv infection, which was accompanied by attenuation of the cell death response and decreased accumulation of H2O2. CaOSM1 overexpression in transgenic Arabidopsis conferred reduced susceptibility and accelerated cell death response and H2O2 accumulation to infection by Pseudomonas syringe pv. tomato and Hyaloperonospora arabidopsidis. Together, these results suggest that CaOSM1 is involved in cell death and oxidative burst responses during plant defense against microbial pathogens.
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