MersV1, France, Analysis, bibRecord, 000331

Structural features of fungal β-d-glucans for the efficient inhibition of the initiation of virus infection on Nicotiana tabacum

Identifieur interne : 000331 ( France/Analysis ); précédent : 000330; suivant : 000332

Structural features of fungal β-d-glucans for the efficient inhibition of the initiation of virus infection on Nicotiana tabacum

Auteurs : Philippe Rouhier [France] ; Marguerite Kopp [France] ; Valerie Begot [France] ; Maud Bruneteau [France] ; Bernard Fritig [France]

Source :

Phytochemistry [ 0031-9422 ] ; 1995.

RBID : ISTEX:AB9BD1FC3F72C080C59929A945A1DF96E496D52E

English descriptors

Abstract

Abstract: Glucans of fungal origin have been shown to inhibit the early stages of infection of Nicotiana by numerous viruses of different tzxonomic groups. Several glucans were isolated from the cell walls of Phytophthora parasitica, Phytophthora megasperma f. sp. glycinea (Pmg) and Fusarium oxysporum, and their antiviral activity compared on tobacco leaves inoculated with tobacco mosaic virus. These polysaccharides consist of a mixture of (1 3)(1 6)-β-d-glucans with Mr, varying from 1.1 × 103 to 2 × 106. Requirements for a prominent antiviral activity of the fungal polysaccharides are a β-(1 3)(1 6)-d-glucan structure with mono-, di-, tri- or tetra-glucosidic side branches attached to a linear main chain of β-(1 3)-linked-d-glucose residues. Very high activity is correlated with a high degree of branching at position 6 and with the size and glycosidic nature of the side chains. The molecular masses and the organized structure of fungal β-d-glucans are not essential for their antiviral activity. The structural motif for antiviral activity in Nicotiana is distinct from that required for elicitation of phytoalexins in soybean cotyledons.

Url:

https://api.istex.fr/ark:/67375/6H6-ZBFK2CT7-V/fulltext.pdf

DOI: 10.1016/0031-9422(94)00852-K

Affiliations:

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to stream Istex, to step Corpus: 001078
to stream Istex, to step Curation: 001078
to stream Istex, to step Checkpoint: 001819
to stream Main, to step Merge: 004189
to stream Main, to step Curation: 004128
to stream Main, to step Exploration: 004128
to stream France, to step Extraction: 000331

Links to Exploration step

ISTEX:AB9BD1FC3F72C080C59929A945A1DF96E496D52E

Le document en format XML

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<term>Phytophthora parasitica, P. megasperma</term>
<term>Solancceae</term>
<term>inhibitors of viral infection</term>
<term>laminaran</term>
<term>tobacco-mosaic virus</term>
<term>β-(1 3)-linked d-glucopyranosyl residues with (1 → 6) linked branched saccharides</term>
<term>β-d-glucans</term>
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<keywords scheme="Teeft" xml:lang="en"><term>Antiviral</term>
<term>Antiviral activities</term>
<term>Antiviral activity</term>
<term>Antiviral glucans</term>
<term>Cell wall glucan preparation</term>
<term>Cell walls</term>
<term>Commercial laminaran</term>
<term>Different taxonomic groups</term>
<term>Early stages</term>
<term>Elicitor activity</term>
<term>Fungal</term>
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<term>Fusarium oxysporum</term>
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<term>High degree</term>
<term>High degrees</term>
<term>Host plants</term>
<term>Huguenin</term>
<term>Huguenin medium</term>
<term>Infestans glucan</term>
<term>Inoculation</term>
<term>Laminaran</term>
<term>Lesion</term>
<term>Lesion numbers</term>
<term>Local lesions</term>
<term>Main chain</term>
<term>Mechanical inoculation</term>
<term>Molecular masses</term>
<term>Molecular weight fractions</term>
<term>Molecular weights</term>
<term>Native glucans</term>
<term>Numerous viruses</term>
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<term>Oxysporum</term>
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<term>Periodate oxidation</term>
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<term>Relative amounts</term>
<term>Relative lesion number</term>
<term>Same buffer</term>
<term>Same dose</term>
<term>Several nicotiana species</term>
<term>Side branches</term>
<term>Side chains</term>
<term>Sodium hydroxide</term>
<term>Soluble mycolaminaran</term>
<term>Soybean cotyledons</term>
<term>Structural features</term>
<term>Structural requirements</term>
<term>Tobacco mosaic virus</term>
<term>Various degrees</term>
<term>Viral infection</term>
<term>Virus infection</term>
<term>Virus inoculation</term>
<term>Virus multiplication</term>
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<front><div type="abstract" xml:lang="en">Abstract: Glucans of fungal origin have been shown to inhibit the early stages of infection of Nicotiana by numerous viruses of different tzxonomic groups. Several glucans were isolated from the cell walls of Phytophthora parasitica, Phytophthora megasperma f. sp. glycinea (Pmg) and Fusarium oxysporum, and their antiviral activity compared on tobacco leaves inoculated with tobacco mosaic virus. These polysaccharides consist of a mixture of (1 3)(1 6)-β-d-glucans with Mr, varying from 1.1 × 103 to 2 × 106. Requirements for a prominent antiviral activity of the fungal polysaccharides are a β-(1 3)(1 6)-d-glucan structure with mono-, di-, tri- or tetra-glucosidic side branches attached to a linear main chain of β-(1 3)-linked-d-glucose residues. Very high activity is correlated with a high degree of branching at position 6 and with the size and glycosidic nature of the side chains. The molecular masses and the organized structure of fungal β-d-glucans are not essential for their antiviral activity. The structural motif for antiviral activity in Nicotiana is distinct from that required for elicitation of phytoalexins in soybean cotyledons.</div>
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Structural features of fungal β-d-glucans for the efficient inhibition of the initiation of virus infection on Nicotiana tabacum

Structural features of fungal β-d-glucans for the efficient inhibition of the initiation of virus infection on Nicotiana tabacum

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri