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Defense and Resistance-inducing Activities in Tobacco of the Sulfated β-1,3 glucan PS3 and its Synergistic Activities with the Unsulfated Molecule

Identifieur interne : 002628 ( Main/Exploration ); précédent : 002627; suivant : 002629

Defense and Resistance-inducing Activities in Tobacco of the Sulfated β-1,3 glucan PS3 and its Synergistic Activities with the Unsulfated Molecule

Auteurs : Rozenn Me Nard [France] ; Patrice De Ruffray [France] ; Bernard Fritig [France] ; Jean-Claude Yvin [France] ; Serge Kauffmann [France]

Source :

Plant and Cell Physiology [ 0032-0781 ] ; 2005.

RBID : ISTEX:329D9D823AD1BFB95024BC41872A75365DFF45DC

English descriptors

Teeft :
- Acidic, Anova, Anova test, Biol, Ccoaomt, Cell suspensions, Control plants, Cordelier, Cultured tobacco cells, Defense responses, Different concentrations, Different plants, Different times, Dorey, Eliciting, Eliciting activities, Elicitor, Elicitor activity, Elicitors, Extracellular oxidative burst, Fritig, Glucan, Glucan sulfate, Glucanase, Glucanase activity, Glucose, Glucose branches, Infiltration site, Kauffmann, Laminarin, Leaf tissues, Lesion, Lesion diameter, Lesion number, Lesion size, Localized, Megaspermin, Nicotiana tabacum, Open circles, Oxidative, Oxidative burst, Pathway, Phenylpropanoid pathway, Physiol, Phytophthora, Phytophthora megasperma, Plant cell, Plant physiol, Pr2e, Refractory state, Resistance responses, Salicylic, Salicylic acid, Samsun, Specific radioactivity, Strict localization, Sulfate, Sulfate residues, Synergistic effect, Synergy, Systemic, Systemic induction, Tabacum, Tobacco, Tobacco cell suspensions, Tobacco cells, Tobacco mosaic virus, Tobacco plants, Tobacco tissues, Total immunity, Transgenic, Virus infection, Virus multiplication, Xanthi.

Abstract

Laminarin, a β-1,3 glucan with single β-glucose branches at position 6, was chemically sulfated to produce PS3 with a degree of sulfation of 2.4. PS3 has previously been shown to activate the salicylic acid (SA) signaling pathway in infiltrated tobacco and Arabidopsis thaliana leaf tissues. Here, we investigated whether PS3 induces systemic defense and resistance responses in tobacco. Using a radiolabeled compound, it was first demonstrated that PS3 remains strictly localized to the infiltrated tissues. PS3 is also resistant to β-glucanase degradation. In transgenic PR1–β-glucuronidase (GUS) tobacco plants, PS3 causes a strong increase in GUS activity in treated tissues but none in untreated leaves. PS3-infiltrated tissues challenged with tobacco mosaic virus (TMV) 8 d after elicitor application show a decrease in both the lesion number and the lesion size, whereas treatment with laminarin, the unsulfated native glucan, affected only the lesion number. PS3 does not induce systemic acquired resistance to TMV. PS3 and laminarin show synergistic effects in promoting the oxidative burst in tobacco cell suspensions and in increasing the expression of genes encoding O-methyltransferases of the phenylpropanoid pathway in tobacco plants. No synergistic effect was observed on the expression of either the SA-dependent acidic PR1 gene or the ethylene-dependent basic PR5 gene in tobacco plants.

Url:

https://api.istex.fr/ark:/67375/HXZ-15JNHCHX-W/fulltext.pdf

DOI: 10.1093/pcp/pci212

Affiliations:

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Le document en format XML

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<term>Ccoaomt</term>
<term>Cell suspensions</term>
<term>Control plants</term>
<term>Cordelier</term>
<term>Cultured tobacco cells</term>
<term>Defense responses</term>
<term>Different concentrations</term>
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<term>Different times</term>
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<term>Infiltration site</term>
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<term>Laminarin</term>
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<front><div type="abstract" xml:lang="en">Laminarin, a β-1,3 glucan with single β-glucose branches at position 6, was chemically sulfated to produce PS3 with a degree of sulfation of 2.4. PS3 has previously been shown to activate the salicylic acid (SA) signaling pathway in infiltrated tobacco and Arabidopsis thaliana leaf tissues. Here, we investigated whether PS3 induces systemic defense and resistance responses in tobacco. Using a radiolabeled compound, it was first demonstrated that PS3 remains strictly localized to the infiltrated tissues. PS3 is also resistant to β-glucanase degradation. In transgenic PR1–β-glucuronidase (GUS) tobacco plants, PS3 causes a strong increase in GUS activity in treated tissues but none in untreated leaves. PS3-infiltrated tissues challenged with tobacco mosaic virus (TMV) 8 d after elicitor application show a decrease in both the lesion number and the lesion size, whereas treatment with laminarin, the unsulfated native glucan, affected only the lesion number. PS3 does not induce systemic acquired resistance to TMV. PS3 and laminarin show synergistic effects in promoting the oxidative burst in tobacco cell suspensions and in increasing the expression of genes encoding O-methyltransferases of the phenylpropanoid pathway in tobacco plants. No synergistic effect was observed on the expression of either the SA-dependent acidic PR1 gene or the ethylene-dependent basic PR5 gene in tobacco plants.</div>
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Defense and Resistance-inducing Activities in Tobacco of the Sulfated β-1,3 glucan PS3 and its Synergistic Activities with the Unsulfated Molecule

Defense and Resistance-inducing Activities in Tobacco of the Sulfated β-1,3 glucan PS3 and its Synergistic Activities with the Unsulfated Molecule

Source :

English descriptors

Abstract

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

Le document en format XML

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