Lipoxygenase and glutathione peroxidase activity in tobacco leaves inoculated with tobacco mosaic virus

A. Künstler; L. Király; M. Pogány; I. Tóbiás; G. Gullner

doi:10.1556/aphyt.42.2007.2.3

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Acta Phytopathologica et Entomologica Hungarica

Volume/Issue:: Volume 42: Issue 2

Lipoxygenase and glutathione peroxidase activity in tobacco leaves inoculated with tobacco mosaic virus

Authors:

A. Künstler

A. Künstler Hungarian Academy of Sciences Plant Protection Institute P.O. Box 102 H-1525 Budapest Hungary

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L. Király

L. Király Hungarian Academy of Sciences Plant Protection Institute P.O. Box 102 H-1525 Budapest Hungary

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M. Pogány

M. Pogány Hungarian Academy of Sciences Plant Protection Institute P.O. Box 102 H-1525 Budapest Hungary

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I. Tóbiás

I. Tóbiás Hungarian Academy of Sciences Plant Protection Institute P.O. Box 102 H-1525 Budapest Hungary

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G. Gullner

G. Gullner Hungarian Academy of Sciences Plant Protection Institute P.O. Box 102 H-1525 Budapest Hungary

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Pages:: 197–207

Online Publication Date:: 26 Nov 2007

Publication Date:: 01 Dec 2007

Article Category:: Journal Article

DOI:: https://doi.org/10.1556/aphyt.42.2007.2.3

Keywords:: fatty acid hydroperoxide; glutathione peroxidase; glutathione S-transferase; hypersensitive reaction; lipid peroxidation; lipoxygenase; tobacco

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Fatty acid hydroperoxide-producing lipoxygenase (LOX) and hydroperoxide-degrading glutathione peroxidase (GPOX) enzyme activities were studied in leaves of virus resistant Xanthi-nc and susceptible Samsun-nn tobacco cultivars after inoculation with Tobacco mosaic virus (TMV). Total LOX activity showed a maximum at pH 5.5 in cell-free extracts of uninfected leaves. LOX activity markedly increased at this pH after TMV inoculation, but a substantial induction was detected also in the basic pH range with an emerging peak around pH = 8.5. TMV-elicited LOX induction was weaker and appeared later in Samsun-nn than in Xanthi-nc leaves. GPOX activity was also substantially induced by TMV infection. However, this induction appeared only 4 days post-inoculation in resistant Xanthi-nc plants in tissues surrounding the localized necrotic lesions. In contrast, GPOX activity did not change in TMV-inoculated, susceptible Samsun-nn leaves. Several glutathione S-transferase (GST) isoenzymes also display GPOX activity. The expression of a tau class GST gene was markedly induced by TMV inoculation in Xanthi-nc leaves. This tobacco GST gene was partially cloned and sequenced.

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Acta Phytopathologica et Entomologica Hungarica

Print ISSN:: 0238-1249

Online ISSN:: 1588-2691

Editor-in-Chief

Jenő KONTSCHÁN Centre for Agricultural Research, Hungary

Technical Editor

Ágnes TURÓCI Centre for Agricultural Research, Hungary

Section Editor

K SALÁNKI Centre for Agricultural Research, Hungary

Editorial Board

Z BOZSÓ Centre for Agricultural Research, Hungary

PE CHETVERIKOV Saint-Petersburg State University, Russia

JX CUI Henan Institute of Science and Technology, China

J FODOR Centre for Agricultural Research, Hungary

Z IMREI Centre for Agricultural Research, Hungary

BM KAYDAN Çukurova University, Turkey

L KISS University of Southern Queensland, Australia

V MARKÓ Hungarian University of Agriculture and Life Sciences, Hungary

MW NEGM Ibaraki University, Japan

L PALKOVICS Széchenyi István University, Hungary

M POGÁNY Centre for Agricultural Research, Hungary

D RÉDEI National Chung Hsing University, Taiwan

A TOLSTIKOV University of Tyumen, Russia

J VUTS Rothamsted Research, UK

GQ WANG Guangxi University, China

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Acta Phytopathologica et Entomologica Hungarica
Language	English
Size	B5
Year of Foundation	1966
Volumes per Year	1
Issues per Year	2
Founder	Magyar Tudományos Akadémia
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ISSN	0238-1249 (Print)
ISSN	1588-2691 (Online)