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Title 

Pathogen-induced expression of cyclo-oxygenase homologue in hot pepper (Capsicum annuum cv. Pukang)

Authors 

Young Cheol KimSo Young YiHyung Gon MangYoung Sam SeoWoo Taek KimDo Il Choi

Publisher 

Oxford University Press (OUP)

Issue Date 

2002

Citation 

Journal of Experimental Botany, vol. 53, no. 367, pp. 383-385

Keywords 

cyclo-oxygenasehot pepperhypersensitive reactionpathogen infectionplant defence mechanismcapsicumcapsicum annuumcapsicum frutescenscyclooxygenase 1oxygenase

Abstract 

The hypersensitive reaction (HR) in plants is typified by a rapid and localized cell death at the site of pathogen infection. To understand better the molecular and cellular defence mechanism controlling HR, hot pepper leaves (Capsicum annuum cv. Pukang) were inoculated with the soybean pustule pathogen Xanthomonas campestris pv. glycine 8ra. By using the DD-PCR technique, a cDNA fragment was identified that exhibited a sequence similarity to the recently identified tobacco pathogen-induced oxygenase (PIOX) with homology to animal cyclo-oxygenase (COX). Subsequently, the full-length cDNA clone, pCa-COX1, encoding the COX homologue from the pathogen-inoculated hot pepper leaf cDNA library was isolated. The deduced amino acid sequence of Ca-COX1 shares 85.8% identity with tobacco PIOX and displays a significant degree of sequence identity (21.7-23.7%) with mammalian COXs. The expression of Ca-COX1 was markedly induced at 4-12 h after pathogen infection, while HR cell death on pepper leaves appeared at approximately 15 h post-inoculation. These results are consistent with the notion that the lipid-derived signalling pathway is involved in the initial response of hot pepper plants to pathogen infection.

ISSN 

0022-0957

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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