High CO2 - and pathogen-driven expression of the carbonic anhydrase ßCA3 confers basal immunity in tomato.
New Phytol
; 229(5): 2827-2843, 2021 03.
Article
em En
| MEDLINE
| ID: mdl-33206385
ABSTRACT
Atmospheric CO2 concentrations exert a strong influence on the susceptibility of plants to pathogens. However, the mechanisms involved in the CO2 -dependent regulation of pathogen resistance are largely unknown. Here we show that the expression of tomato (Solanum lycopersicum) ß-CARBONIC ANHYDRASE 3 (ßCA3) is induced by the virulent pathogen Pseudomonas syringae pv. tomato DC3000. The role of ßCA3 in the high CO2 -mediated response in tomato and two other Solanaceae crops is distinct from that in Arabidopsis thaliana. Using ßCA3 knock-out and over-expression plants, we demonstrate that ßCA3 plays a positive role in the activation of basal immunity, particularly under high CO2 . ßCA3 is transcriptionally activated by the transcription factor NAC43 and is also post-translationally regulated by the receptor-like kinase GRACE1. The ßCA3 pathway of basal immunity is independent on stomatal- and salicylic-acid-dependent regulation. Global transcriptome analysis and cell wall metabolite measurement implicate cell wall metabolism/integrity in ßCA3-mediated basal immunity under both CO2 conditions. These data not only highlight the importance of ßCA3 in plant basal immunity under high CO2 in a well-studied susceptible crop-pathogen system, but they also point to new targets for disease management strategies in a changing climate.
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Base de dados:
MEDLINE
Assunto principal:
Anidrases Carbônicas
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Solanum lycopersicum
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Imunidade Vegetal
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article