Alteration of cell wall xylan acetylation trigger 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 type 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 alter...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5641240/ http://www.ncbi.nlm.nih.gov/pubmed/28792629 https://doi.org/10.1111/tpj.13660 |
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ftpubmed:oai:pubmedcentral.nih.gov:5641240 2023-05-15T16:07:02+02:00 Alteration of cell wall xylan acetylation trigger 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 2017-09-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5641240/ http://www.ncbi.nlm.nih.gov/pubmed/28792629 https://doi.org/10.1111/tpj.13660 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5641240/ http://www.ncbi.nlm.nih.gov/pubmed/28792629 http://dx.doi.org/10.1111/tpj.13660 Article Text 2017 ftpubmed https://doi.org/10.1111/tpj.13660 2018-11-04T01:10:00Z Arabidopsis heterotrimeric G protein complex modulates Pathogen Associated Molecular Pattern-triggered immunity (PTI) and disease resistance responses to different type 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 to 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, nor 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 is 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. Text eskimo* PubMed Central (PMC) The Plant Journal 92 3 386 399 |
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Article 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 trigger defense responses that counterbalance the immune deficiencies of plants impaired in the β subunit of the heterotrimeric G protein |
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Arabidopsis heterotrimeric G protein complex modulates Pathogen Associated Molecular Pattern-triggered immunity (PTI) and disease resistance responses to different type 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 to 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, nor 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 is 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. |
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Text |
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 trigger 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 trigger 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 trigger 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 trigger 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 trigger 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 trigger defense responses that counterbalance the immune deficiencies of plants impaired in the β subunit of the heterotrimeric g protein |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5641240/ http://www.ncbi.nlm.nih.gov/pubmed/28792629 https://doi.org/10.1111/tpj.13660 |
genre |
eskimo* |
genre_facet |
eskimo* |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5641240/ http://www.ncbi.nlm.nih.gov/pubmed/28792629 http://dx.doi.org/10.1111/tpj.13660 |
op_doi |
https://doi.org/10.1111/tpj.13660 |
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The Plant Journal |
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92 |
container_issue |
3 |
container_start_page |
386 |
op_container_end_page |
399 |
_version_ |
1766403057363451904 |