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Hydrophobized laminarans as new biocompatible anti-oomycete compounds for grapevine protection
- Source :
- Carbohydrate Polymers, Carbohydrate Polymers, Elsevier, 2019, 225, pp.115224. ⟨10.1016/j.carbpol.2019.115224⟩, Carbohydrate Polymers, 2019, 225, pp.115224. ⟨10.1016/j.carbpol.2019.115224⟩
- Publication Year :
- 2019
-
Abstract
- International audience; Laminaran, a beta-(1 -> 3)-glucan extracted from Laminaria digitata, is a known elicitor of plant defenses, but provides only low level of disease control in vineyard trials. In this context, laminaran was partly hydrophobized by grafting from 1.6 to 7.6 lauryl chains to the native saccharidic chain and the impact of sulfation of the hydrophobized glucans was studied. The activity of the different synthesized laminaran derivatives as antimicrobial agents against Plasmopara viticola, the causal agent of grape downy mildew, and as elicitors of defense reactions in planta, was evaluated. Our results showed that acylation imparts an antimicrobial activity to laminaran which is related to the degree of acylation, AL3, with 7.6 lauryl chains, being the most effective derivative. Sulfation of the acylated laminarans did not further increase the antimicrobial activity. Our results also demonstrated that the efficacy of AL3 against Plasmopara viticola was most likely due to the direct antimicrobial activity of the lauryl chains rather than to an elicitation of plant defenses.
- Subjects :
- Polymers and Plastics
Acylation
Context (language use)
02 engineering and technology
010402 general chemistry
01 natural sciences
Sulfation
Anti-Infective Agents
Laminaran
Materials Chemistry
Plant defense against herbivory
[CHIM]Chemical Sciences
Vitis
Glucans
Disease Resistance
Plant Diseases
biology
Chemistry
Organic Chemistry
food and beverages
Induced resistance
021001 nanoscience & nanotechnology
biology.organism_classification
Antimicrobial
0104 chemical sciences
Elicitor
Biochemistry
Oomycetes
Plasmopara viticola
beta-(1 -> 3)-Glucans
Downy mildew
Grapevine
Laminaria
0210 nano-technology
β-(1→3)-Glucans
Subjects
Details
- ISSN :
- 18791344 and 01448617
- Volume :
- 225
- Database :
- OpenAIRE
- Journal :
- Carbohydrate polymers
- Accession number :
- edsair.doi.dedup.....6cd3ff0008978de6ab4992e1eb89ce06