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The bacterial effector HopM1 suppresses PAMP-triggered oxidative burst and stomatal immunity.

Publication ,  Journal Article
Lozano-Durán, R; Bourdais, G; He, SY; Robatzek, S
Published in: The New phytologist
April 2014

Successful pathogens counter immunity at multiple levels, mostly through the action of effectors. Pseudomonas syringae secretes c. 30 effectors, some of which have been shown to inhibit plant immunity triggered upon perception of conserved pathogen-associated molecular patterns (PAMPs). One of these is HopM1, which impairs late immune responses through targeting the vesicle trafficking-related AtMIN7 for degradation. Here, we report that in planta expressed HopM1 suppresses two early PAMP-triggered responses, the oxidative burst and stomatal immunity, both of which seem to require proteasomal function but are independent of AtMIN7. Notably, a 14-3-3 protein, GRF8/AtMIN10, was found previously to be a target of HopM1 in vivo, and expression of HopM1 mimics the effect of chemically and genetically disrupting 14-3-3 function. Our data further show that the function of 14-3-3 proteins is required for PAMP-triggered oxidative burst and stomatal immunity, and chemical-mediated disruption of the 14-3-3 interactions with their client proteins restores virulence of a HopM1-deficient P. syringae mutant, providing a link between HopM1 and the involvement of 14-3-3 proteins in plant immunity. Taken together, these results unveil the impact of HopM1 on the PAMP-triggered oxidative burst and stomatal immunity in an AtMIN7-independent manner, most likely acting at the function of (a) 14-3-3 protein(s).

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Published In

The New phytologist

DOI

EISSN

1469-8137

ISSN

1469-8137

Publication Date

April 2014

Volume

202

Issue

1

Start / End Page

259 / 269

Related Subject Headings

  • Solanum lycopersicum
  • Respiratory Burst
  • Receptors, Pattern Recognition
  • Reactive Oxygen Species
  • Pseudomonas syringae
  • Proteasome Endopeptidase Complex
  • Plant Stomata
  • Plant Immunity
  • Plant Biology & Botany
  • Nicotiana
 

Citation

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Lozano-Durán, R., Bourdais, G., He, S. Y., & Robatzek, S. (2014). The bacterial effector HopM1 suppresses PAMP-triggered oxidative burst and stomatal immunity. The New Phytologist, 202(1), 259–269. https://doi.org/10.1111/nph.12651
Lozano-Durán, Rosa, Gildas Bourdais, Sheng Yang He, and Silke Robatzek. “The bacterial effector HopM1 suppresses PAMP-triggered oxidative burst and stomatal immunity.The New Phytologist 202, no. 1 (April 2014): 259–69. https://doi.org/10.1111/nph.12651.
Lozano-Durán R, Bourdais G, He SY, Robatzek S. The bacterial effector HopM1 suppresses PAMP-triggered oxidative burst and stomatal immunity. The New phytologist. 2014 Apr;202(1):259–69.
Lozano-Durán, Rosa, et al. “The bacterial effector HopM1 suppresses PAMP-triggered oxidative burst and stomatal immunity.The New Phytologist, vol. 202, no. 1, Apr. 2014, pp. 259–69. Epmc, doi:10.1111/nph.12651.
Lozano-Durán R, Bourdais G, He SY, Robatzek S. The bacterial effector HopM1 suppresses PAMP-triggered oxidative burst and stomatal immunity. The New phytologist. 2014 Apr;202(1):259–269.
Journal cover image

Published In

The New phytologist

DOI

EISSN

1469-8137

ISSN

1469-8137

Publication Date

April 2014

Volume

202

Issue

1

Start / End Page

259 / 269

Related Subject Headings

  • Solanum lycopersicum
  • Respiratory Burst
  • Receptors, Pattern Recognition
  • Reactive Oxygen Species
  • Pseudomonas syringae
  • Proteasome Endopeptidase Complex
  • Plant Stomata
  • Plant Immunity
  • Plant Biology & Botany
  • Nicotiana