Journal
CARBOHYDRATE POLYMERS
Volume 133, Issue -, Pages 384-390Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.07.055
Keywords
Arabidopsis thaliana; Alternaria brassicicola; Colletotrichum higginsianum; Ulvans; Induced resistance; Sulfate content
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Funding
- Coordination for the Improvement of Higher Education Personnel - CAPES
- National Council of Technological and Scientific Development - CNPq
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The present work aimed to evaluate the defense responses induced by chemically sulfated ulvans in Arabidopsis thaliana plants against the phytopathogenic fungi Alternaria brassicicola and Colletotrichum higginsianum. Derivatives with growing sulfate content (from 20.9 to 36.6%) were prepared with SO3-pyridine complex in formamide. NMR and FTIR spectroscopic analyses confirmed the increase of sulfate groups after the chemical sulfation process. The native sulfated polysaccharide (18.9% of sulfate) and its chemically sulfated derivatives similarly reduced the severity of both pathogenic fungi infections. Collectively, our results suggest that ulvans induce resistance against both fungal pathogens independently of its sulfation degree. (C) 2015 Elsevier Ltd. All rights reserved.
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