Sulfated macroalgal polysaccharides λ-carrageenan and ι-carrageenan differentially alter Arabidopsis thaliana resistance to Sclerotinia sclerotiorum
| Autor: | Alan T. Critchley, Sridhar Ravichandran, Balakrishnan Prithiviraj, Kalyani Prithiviraj, Jatinder Singh Sangha |
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| Rok vydání: | 2010 |
| Předmět: |
animal structures
biology animal diseases Jasmonic acid Sclerotinia sclerotiorum Plant Science respiratory system biology.organism_classification Carrageenan carbohydrates (lipids) chemistry.chemical_compound Sulfation chemistry Biochemistry Arabidopsis Genetics Arabidopsis thaliana Sclerotinia Salicylic acid |
| Zdroj: | Physiological and Molecular Plant Pathology. 75:38-45 |
| ISSN: | 0885-5765 |
| DOI: | 10.1016/j.pmpp.2010.08.003 |
| Popis: | We examined the effect of macroalgal polysaccharides ι- and λ-carrageenan, which differ in sulfation, on Arabidopsis resistance to the necrotropic fungal pathogen Sclerotinia scleortiorum . Pretreatment of Arabidopsis with highly sulfated λ-carrageenan induced resistance to S. sclerotiorum resulting in smaller leaf lesions; by contrast, the less sulfated ι-carrageenan enhanced susceptibility. λ-carrageenan induced resistance correlated with increased expression of jasmonic acid related genes AOS , PDF1.2 and PR3. Further, λ-carrageenan increased the oxalase oxidase activity in planta . The λ-carrageenan induced resistance in the salicylic acid deficient mutant ics1 , but did not rescue the susceptibility of jar1 plants suggesting that λ-carrageenan induced resistance is independent of salicylic acid. The difference in the bioactivity of carrageenans is due, at least partly, to differences in the degree of sulfation. |
| Databáze: | OpenAIRE |
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