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Plant and Cell Physiology, 2001, Vol. 42, No. 7 775-779
© 2001 Oxford University Press

In vivo Detection of Tobacco Mosaic Virus-Induced Local and Systemic Oxidative Burst by Electron Paramagnetic Resonance Spectroscopy

József Fodor1,3, Éva Hideg2, Adrianna Kecskés1 and Zoltán Király1

1 Plant Protection Institute, Hungarian Academy of Sciences, Box 102, H-1525 Budapest, Hungary 2 Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, Box 521, H-6701 Szeged, Hungary

This is the first demonstration that tobacco mosaic virus-induced oxidative stress in a necrotic host plant is signalled by an elevated level of monodehydroascorbate (MDA) radicals detected by electron paramagnetic resonance spectroscopy. Furthermore, systemic acquired resistance induced in remote leaves of Xanthi-nc tobacco is also associated with stimulated MDA signals indicative of a microoxidative burst.

3 Corresponding author: E-mail, jfod@nki.hu; Fax, +36-1-356-3698.


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