Lignin‐based barrier restricts pathogens to the infection site and confers resistance in plants
| Autor: | Daniele Roppolo, Yuki Tobimatsu, Hong Joo Cho, Ohkmae K. Park, John Ralph, Hwi Seong Jeon, Seu Ha Kim, Myoung Hoon Lee, Hye Jung Lee, Joo Hee Chung |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Arabidopsis
Plant Immunity 580 Plants (Botany) medicine.disease_cause Lignin Plant Roots General Biochemistry Genetics and Molecular Biology 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Immune system Cell Wall Gene Expression Regulation Plant medicine Extracellular Molecular Biology Pathogen 030304 developmental biology 0303 health sciences General Immunology and Microbiology biology Arabidopsis Proteins General Neuroscience fungi food and beverages Pathogenic bacteria Articles Bacterial Infections biology.organism_classification Cell biology chemistry Host-Pathogen Interactions Casparian strip 030217 neurology & neurosurgery |
| Zdroj: | EMBO J |
| ISSN: | 1460-2075 0261-4189 |
| Popis: | Pathogenic bacteria invade plant tissues and proliferate in the extracellular space. Plants have evolved the immune system to recognize and limit the growth of pathogens. Despite substantial progress in the study of plant immunity, the mechanism by which plants limit pathogen growth remains unclear. Here, we show that lignin accumulates in Arabidopsis leaves in response to incompatible interactions with bacterial pathogens in a manner dependent on Casparian strip membrane domain protein (CASP)-like proteins (CASPLs). CASPs are known to be the organizers of the lignin-based Casparian strip, which functions as a diffusion barrier in roots. The spread of invading avirulent pathogens is prevented by spatial restriction, which is disturbed by defects in lignin deposition. Moreover, the motility of pathogenic bacteria is negatively affected by lignin accumulation. These results suggest that the lignin-deposited structure functions as a physical barrier similar to the Casparian strip, trapping pathogens and thereby terminating their growth. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text