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Title 

Expression of a novel tobacco gene, NgCDM1, is preferentially associated with pathogen-induced cell death

Authors 

M C SuhSang Keun OhYoung Cheol KimHyun Sook PaiDo Il Choi

Publisher 

Elsevier

Issue Date 

2003

Citation 

Physiological and Molecular Plant Pathology, vol. 62, no. 4, pp. 227-235

Keywords 

hypersensitive responsenicotiana glutinosaprogrammed cell deathtobacco mosaic virusnicotiananicotiana tabacumpseudomonaspseudomonas syringaepseudomonas syringae pv. syringae

Abstract 

The nucleotide sequence for NgCDM1 was deposited in GenBank database under the accession number AF208022. Incompatible plant-pathogen interactions result in rapid cell death known as the hypersensitive response (HR) and activation of host defense-related genes. To understand cellular mechanisms controlling HR against pathogen attack, we previously isolated a pool of tobacco genes that are induced or repressed by infection of TMV. In this study, expression of a TMV-induced gene, NgCDM1, which has low sequence homology to known genes was investigated, NgCDM1 mRNA accumulated not only during HR by inoculation of the avirulent pathogen Pseudomonas syringae pv. syringae 61, but also in necrotic cell death caused by infiltration of the virulent pathogen P. s. pv. tabaci. However, induction of the NgCDM1 transcripts was not triggered by cell death caused by senescence or freezing stress. Expression of NgCDM1 mRNA was independent of the plant defense signaling pathways induced by salicylic acid, methyl jasmonate, or H2O2 and also not associated with systemic acquired resistance, Immunoblot analysis revealed that NgCDM1 protein coincidently accumulated with induction of NgCDM1 transcript and was localized primarily in the vicinity of HR-lesion. These results indicate that expression of NgCDM1 gene is preferentially associated with pathogen-induced cell death.

ISSN 

0885-5765

Link 

http://dx.doi.org/10.1016/S0885-5765(03)00049-3

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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