Establishment of Acquired Resistance Confers Reduced Levels of Superoxide and Hydrogen Peroxide in TMV-infected Tobacco Leaves

Y. M Hafez; J. Fodor; Z. Király

doi:10.1556/aphyt.39.2004.4.3

Acta Phytopathologica et Entomologica Hungarica

Volume/Issue:: Volume 39: Issue 4

Establishment of Acquired Resistance Confers Reduced Levels of Superoxide and Hydrogen Peroxide in TMV-infected Tobacco Leaves

Authors:

Y. M Hafez

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

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J. Fodor

J. Fodor Plant Protection Institute, Hungarian Academy of Sciences H-1525 Budapest, P.O. Box 102, Hungary

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, and

Z. Király

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

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Pages:: 347–359

Online Publication Date:: 22 Jul 2005

Publication Date:: 01 Nov 2004

Article Category:: Journal Article

DOI:: https://doi.org/10.1556/aphyt.39.2004.4.3

Keywords:: hydrogen peroxide; hydrogen peroxide; tobacco mosaic virus; superoxide; systemic acquired resistance

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Infection of some leaves of Xanthi-nc tobacco with tobacco mosaic virus (TMV) induces systemic acquired resistance (SAR) in remote leaves of the plant to a second (challenge) infection, and therefore produces only a limited necrotization in the resistant leaves. Here we show that the levels of superoxide and hydrogen peroxide are lower in the remote infected leaves exhibiting the SAR. Treatment of leaves of Xanthi-nc tobacco with benzothiadiazole (BTH) also suppresses tissue necrotization and accumulation of superoxide and hydrogen peroxide upon TMV inoculation. However, both of these reactive oxygen species are up-regulated and tissue necrotization is increased in a transgenic NahG tobacco, which is unable to produce a SAR response. Treatment of TMV-infected NahG leaves with BTH also resulted in a reduced level of necrotization and an attenuated accumulation of superoxide and hydrogen peroxide after inoculation with TMV. Thus, the level of reactive oxygen species seems to be correlated with the size and number of necrotic lesions caused by TMV. It would seem that reactive oxygen species play a pivotal role in TMV-induced cell death response.

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Acta Phytopathologica et Entomologica Hungarica

Print ISSN:: 0238-1249

Online ISSN:: 1588-2691

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Jenő KONTSCHÁN Centre for Agricultural Research, Hungary

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Ágnes TURÓCI Centre for Agricultural Research, Hungary

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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
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