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Gene Review:

OCP3 - overexpressor of cationic peroxidase 3

Arabidopsis thaliana

Synonyms: F2I11.160, F2I11_160

Coego, A. et al.

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Disease relevance of OCP3

Conversely, resistance to virulent forms of the biotrophic oomycete Hyaloperonospora parasitica and the bacterial pathogen Pseudomonas syringae pv tomato DC3000 remains unaffected in ocp3 plants when compared with wild-type plants [1].

High impact information on OCP3

Together, these results suggest that OCP3 is an important factor for the COI1-dependent resistance of plants to infection by necrotrophic pathogens [1].
The OCP3 gene encodes a homeodomain transcription factor that is constitutively expressed in healthy plants but repressed in response to infection by necrotrophic fungi [1].
Consistently with this, ocp3 plants are not affected in SA perception and express normal levels of PR genes after pathogen attack [1].
Healthy ocp3 plants show increased accumulation of H(2)O(2) and express constitutively the Glutathione S-transferase1 and Plant Defensine 1.2 marker genes, but not the salicylic acid (SA)-dependent pathogenesis-related PR-1 gene [1].

References

An Arabidopsis homeodomain transcription factor, OVEREXPRESSOR OF CATIONIC PEROXIDASE 3, mediates resistance to infection by necrotrophic pathogens. Coego, A., Ramirez, V., Gil, M.J., Flors, V., Mauch-Mani, B., Vera, P. Plant Cell (2005) [Pubmed]

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