Alteration of cell wall xylan acetylation triggers defense responses that counterbalance the immune deficiencies of plants impaired in the β-subunit of the heterotrimeric G-protein
Arabidopsis heterotrimeric G-protein complex modulates pathogen-associated molecular pattern-triggered immunity (PTI) and disease resistance responses to different types of pathogens. It also plays a role in plant cell wall integrity as mutants impaired in the Gβ- (agb1-2) or Gγ-subunits have an alt...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/199095 2023-05-15T16:06:55+02:00 Alteration of cell wall xylan acetylation triggers defense responses that counterbalance the immune deficiencies of plants impaired in the β-subunit of the heterotrimeric G-protein Escudero, Viviana Jordá, Lucía Sopeña-Torres, Sara Mélida, Hugo Miedes, Eva Muñoz-Barrios, Antonio Swami, Sanjay Alexander, Danny McKee, Lauren S. Sánchez-Vallet, Andrea Bulone, Vincent Jones, Alan M. Molina, Antonio 2017-11 application/application/pdf https://hdl.handle.net/20.500.11850/199095 https://doi.org/10.3929/ethz-b-000199095 en eng Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1111/tpj.13660 info:eu-repo/semantics/altIdentifier/wos/000412932100005 http://hdl.handle.net/20.500.11850/199095 doi:10.3929/ethz-b-000199095 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International CC-BY The Plant Journal, 92 (3) heterotrimeric G-protein AGB1 agb1-2 plant cell wall Xylan necrotrophic fungi Immunity pathogen-associated molecular pattern Plectosphaerella cucumerina Arabidopsis thaliana info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftethz https://doi.org/20.500.11850/199095 https://doi.org/10.3929/ethz-b-000199095 https://doi.org/10.1111/tpj.13660 2022-04-25T13:21:30Z Arabidopsis heterotrimeric G-protein complex modulates pathogen-associated molecular pattern-triggered immunity (PTI) and disease resistance responses to different types of pathogens. It also plays a role in plant cell wall integrity as mutants impaired in the Gβ- (agb1-2) or Gγ-subunits have an altered wall composition compared with wild-type plants. Here we performed a mutant screen to identify suppressors of agb1-2 (sgb) that restore susceptibility to pathogens to wild-type levels. Out of the four sgb mutants (sgb10–sgb13) identified, sgb11 is a new mutant allele of ESKIMO1 (ESK1), which encodes a plant-specific polysaccharide O-acetyltransferase involved in xylan acetylation. Null alleles (sgb11/esk1-7) of ESK1 restore to wild-type levels the enhanced susceptibility of agb1-2 to the necrotrophic fungus Plectosphaerella cucumerina BMM (PcBMM), but not to the bacterium Pseudomonas syringae pv. tomato DC3000 or to the oomycete Hyaloperonospora arabidopsidis. The enhanced resistance to PcBMM of the agb1-2 esk1-7 double mutant was not the result of the re-activation of deficient PTI responses in agb1-2. Alteration of cell wall xylan acetylation caused by ESK1 impairment was accompanied by an enhanced accumulation of abscisic acid, the constitutive expression of genes encoding antibiotic peptides and enzymes involved in the biosynthesis of tryptophan-derived metabolites, and the accumulation of disease resistance-related secondary metabolites and different osmolites. These esk1-mediated responses counterbalance the defective PTI and PcBMM susceptibility of agb1-2 plants, and explain the enhanced drought resistance of esk1 plants. These results suggest that a deficient PTI-mediated resistance is partially compensated by the activation of specific cell-wall-triggered immune responses. ISSN:0960-7412 ISSN:1365-313X Article in Journal/Newspaper eskimo* ETH Zürich Research Collection |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
heterotrimeric G-protein AGB1 agb1-2 plant cell wall Xylan necrotrophic fungi Immunity pathogen-associated molecular pattern Plectosphaerella cucumerina Arabidopsis thaliana |
spellingShingle |
heterotrimeric G-protein AGB1 agb1-2 plant cell wall Xylan necrotrophic fungi Immunity pathogen-associated molecular pattern Plectosphaerella cucumerina Arabidopsis thaliana Escudero, Viviana Jordá, Lucía Sopeña-Torres, Sara Mélida, Hugo Miedes, Eva Muñoz-Barrios, Antonio Swami, Sanjay Alexander, Danny McKee, Lauren S. Sánchez-Vallet, Andrea Bulone, Vincent Jones, Alan M. Molina, Antonio Alteration of cell wall xylan acetylation triggers defense responses that counterbalance the immune deficiencies of plants impaired in the β-subunit of the heterotrimeric G-protein |
topic_facet |
heterotrimeric G-protein AGB1 agb1-2 plant cell wall Xylan necrotrophic fungi Immunity pathogen-associated molecular pattern Plectosphaerella cucumerina Arabidopsis thaliana |
description |
Arabidopsis heterotrimeric G-protein complex modulates pathogen-associated molecular pattern-triggered immunity (PTI) and disease resistance responses to different types of pathogens. It also plays a role in plant cell wall integrity as mutants impaired in the Gβ- (agb1-2) or Gγ-subunits have an altered wall composition compared with wild-type plants. Here we performed a mutant screen to identify suppressors of agb1-2 (sgb) that restore susceptibility to pathogens to wild-type levels. Out of the four sgb mutants (sgb10–sgb13) identified, sgb11 is a new mutant allele of ESKIMO1 (ESK1), which encodes a plant-specific polysaccharide O-acetyltransferase involved in xylan acetylation. Null alleles (sgb11/esk1-7) of ESK1 restore to wild-type levels the enhanced susceptibility of agb1-2 to the necrotrophic fungus Plectosphaerella cucumerina BMM (PcBMM), but not to the bacterium Pseudomonas syringae pv. tomato DC3000 or to the oomycete Hyaloperonospora arabidopsidis. The enhanced resistance to PcBMM of the agb1-2 esk1-7 double mutant was not the result of the re-activation of deficient PTI responses in agb1-2. Alteration of cell wall xylan acetylation caused by ESK1 impairment was accompanied by an enhanced accumulation of abscisic acid, the constitutive expression of genes encoding antibiotic peptides and enzymes involved in the biosynthesis of tryptophan-derived metabolites, and the accumulation of disease resistance-related secondary metabolites and different osmolites. These esk1-mediated responses counterbalance the defective PTI and PcBMM susceptibility of agb1-2 plants, and explain the enhanced drought resistance of esk1 plants. These results suggest that a deficient PTI-mediated resistance is partially compensated by the activation of specific cell-wall-triggered immune responses. ISSN:0960-7412 ISSN:1365-313X |
format |
Article in Journal/Newspaper |
author |
Escudero, Viviana Jordá, Lucía Sopeña-Torres, Sara Mélida, Hugo Miedes, Eva Muñoz-Barrios, Antonio Swami, Sanjay Alexander, Danny McKee, Lauren S. Sánchez-Vallet, Andrea Bulone, Vincent Jones, Alan M. Molina, Antonio |
author_facet |
Escudero, Viviana Jordá, Lucía Sopeña-Torres, Sara Mélida, Hugo Miedes, Eva Muñoz-Barrios, Antonio Swami, Sanjay Alexander, Danny McKee, Lauren S. Sánchez-Vallet, Andrea Bulone, Vincent Jones, Alan M. Molina, Antonio |
author_sort |
Escudero, Viviana |
title |
Alteration of cell wall xylan acetylation triggers defense responses that counterbalance the immune deficiencies of plants impaired in the β-subunit of the heterotrimeric G-protein |
title_short |
Alteration of cell wall xylan acetylation triggers defense responses that counterbalance the immune deficiencies of plants impaired in the β-subunit of the heterotrimeric G-protein |
title_full |
Alteration of cell wall xylan acetylation triggers defense responses that counterbalance the immune deficiencies of plants impaired in the β-subunit of the heterotrimeric G-protein |
title_fullStr |
Alteration of cell wall xylan acetylation triggers defense responses that counterbalance the immune deficiencies of plants impaired in the β-subunit of the heterotrimeric G-protein |
title_full_unstemmed |
Alteration of cell wall xylan acetylation triggers defense responses that counterbalance the immune deficiencies of plants impaired in the β-subunit of the heterotrimeric G-protein |
title_sort |
alteration of cell wall xylan acetylation triggers defense responses that counterbalance the immune deficiencies of plants impaired in the β-subunit of the heterotrimeric g-protein |
publisher |
Wiley-Blackwell |
publishDate |
2017 |
url |
https://hdl.handle.net/20.500.11850/199095 https://doi.org/10.3929/ethz-b-000199095 |
genre |
eskimo* |
genre_facet |
eskimo* |
op_source |
The Plant Journal, 92 (3) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/tpj.13660 info:eu-repo/semantics/altIdentifier/wos/000412932100005 http://hdl.handle.net/20.500.11850/199095 doi:10.3929/ethz-b-000199095 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.11850/199095 https://doi.org/10.3929/ethz-b-000199095 https://doi.org/10.1111/tpj.13660 |
_version_ |
1766402931414794240 |