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A Loss of Resistance to Avirulent Bacterial Pathogens in Tobacco Is Associated with the Attenuation of a Salicylic Acid-potentiated Oxidative Burst by Luis A. J. Mur; Ian R. Brown; Robert M. Darby; Charles S. Bestwick; Yong-Mei Bi; John W. Mansfield; John Draper is a Agricultural and Biological Sciences article available to read on EtoBox.
What is A Loss of Resistance to Avirulent Bacterial Pathogens in Tobacco Is Associated with the Attenuation of a Salicylic Acid-potentiated Oxidative Burst about?
The role of salicylic acid (SA) in events occurring before cell death during the hypersensitive reaction (HR) was investigated in leaves of wild-type tobacco Samsun NN and in transgenic lines expressing salicylate hydroxylase (35S-SH-L). Challenge of 35S-SH-L tobacco with avirulent strains of Pseudomonas syringae gave rise to symptoms resembling those normally associated with a compatible response to virulent strains in terms of visible phenotype, kinetics of bacterial multiplication, and escape from the infection site. Compared with responses in wild-type tobacco, both the onset of plant cell death and the induction of an active oxygen species-responsive promoter (AoPR1-GUS) were delayed following challenge of 35S-SH-L plants with avirulent bacteria. The oxidative burst occurring after challenge with avirulent bacteria was visualized histochemically and quantified in situ. H2O2 accumulation at reaction sites was evident within 1 h after inoculation in wild-type tobacco, whereas in 35S-SH-L plants the onset of H2O2 accumulation was delayed by 2-3 h. The delay in H2O2 generation was correlated with a reduction in the transient rise in SA that usually occurred within 1-2 h following
Who reads A Loss of Resistance to Avirulent Bacterial Pathogens in Tobacco Is Associated with the Attenuation of a Salicylic Acid-potentiated Oxidative Burst?
It is typically read by researchers, students, and practitioners in Agricultural and Biological Sciences.
- Author
- Luis A. J. Mur; Ian R. Brown; Robert M. Darby; Charles S. Bestwick; Yong-Mei Bi; John W. Mansfield; John Draper
- Publisher
- John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0960-7412)
- Published
- 2000
- Language
- EN
- Field
- Agricultural and Biological Sciences (Life Sciences)