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Polyamines as a common source of hydrogen peroxide in host- and nonhost hypersensitive response during pathogen infection

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Abstract

The hypersensitive response (HR) is a powerful resistance system that plants have developed against pathogen attack. There are two major pathways for HR induction; one is through recognition of the pathogen by a specific host protein, and is known as the host HR. The other is through common biochemical changes upon infection—the nonhost HR. We previously demonstrated that hydrogen peroxide derived from polyamine degradation by polyamine oxidase triggers the typical host HR in tobacco plants upon infection with tobacco mosaic virus. However, it remains to be determined whether or not polyamines are involved in the nonhost HR in tobacco, and in the host HR in other plant species. When tobacco plants were infected with Pseudomonas cichorii, a representative nonhost pathogen, transcripts for six genes encoding enzymes for polyamine metabolism were simultaneously induced, and polyamines were accumulated in apoplasts. Hydrogen peroxide was concomitantly produced and hypersensitive cell death occurred at infected sites. Silencing of polyamine oxidase by the virus-induced gene silencing method resulted in suppression of hydrogen peroxide production and in disappearance of visible hypersensitive cell death with an increase in bacterial growth. Our results indicated that polyamines served as the source of hydrogen peroxide during the nonhost HR in tobacco plants. Further analysis revealed that polyamines were accumulated in apoplasts of Arabidopsis thaliana infected with Pseudomonas syringae, and of rice infected with Magnaporthe grisea, both causing the typical host HR. As in tobacco, it is conceivable that the same mechanism operates for nonhost HR in these plants. Our present observations thus suggested that polyamines are commonly utilized as the source of hydrogen peroxide during host- and nonhost HRs in higher plants.

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Abbreviations

ADC:

Arginine decarboxylase

DAB:

3,3′-diaminobenzidine

HR:

Hypersensitive response

Nb:

Nicotiana benthamiana

Nt:

Nicotiana tabacum

ODC:

Ornithine decarboxylase

PAO:

Polyamine oxidase

Put:

Putrescine

SAMDC:

S-Adenosylmethionine decarboxylase

Spd:

Spermidine

SPDS:

Spermidine synthase

Spm:

Spermine

SPMS:

Spermine synthase

TMV:

Tobacco mosaic virus

TRV:

Tobacco rattle virus

VIGS:

Virus-induced gene silencing

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Acknowledgements

The authors thank David C. Baulcombe (John Innes Centre) and Hirofumi Yoshioka (Nagoya University) for generous provision of A. tumefaciens GV3101 strain and C58C1 strain containing pBINTRA6, and TRV vector; Jeffery L. Dangl (University of North Carolina) for P. syringae DC3000 (avrRpm1); and Tsutomu Kawasaki (Nara Institute of Science and Technology) for M. grisea (race 031).

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Correspondence to Hiroshi Yoda.

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Hiroshi Yoda and Kazuki Fujimura have contributed equally to this work.

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Yoda, H., Fujimura, K., Takahashi, H. et al. Polyamines as a common source of hydrogen peroxide in host- and nonhost hypersensitive response during pathogen infection. Plant Mol Biol 70, 103–112 (2009). https://doi.org/10.1007/s11103-009-9459-0

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  • DOI: https://doi.org/10.1007/s11103-009-9459-0

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