Oligosaccharides successfully thwart hijacking of the salicylic acid pathway by Phytophthora infestans in potato leaves

G. van Aubel, S. Serderidis, J. Ivens, A. Clinckemaillie, A. Legrève, B. Hause, P. Van Cutsem

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

Potato growing is severely threatened by the late blight agent Phytophthora infestans, which is usually controlled by massive amounts of fungicides. While variety resistance is often bypassed by the pathogen, the plant innate immunity opens the way to new biological plant protection tools, e.g. the COS-OGA elicitor. This oligosaccharide composition mimics the interaction between plants and fungal pathogens as it combines chitosan oligomers (COS) with pectin-derived oligogalacturonides (OGA). Two different COS-OGA elicitors were evaluated against potato late blight: FytoSave, mainly efficient against powdery mildews, and FytoSol, a new composition still under development. In addition, a comparative study of plant defence induction was performed, focusing on the effect of repeated sprayings as well as on the stimulation of salicylic acid (SA), jasmonic acid and ethylene-related pathways during the biotrophic and necrotrophic growth stages of the pathogen. The FytoSave elicitor strongly increased the SA content but failed to induce sufficient protection against late blight, while FytoSol maintained or even decreased the free SA content in the presence of P. infestans and was completely efficient. Surprisingly, the necrotrophic development of P. infestans occurred along with a strong leaf accumulation of free SA and SA-related transcripts. This may represent an attempt by P. infestans to divert plant defences for its own benefit. Preventive sprayings with FytoSol but not FytoSave completely impeded this hijacking. FytoSol seemed to keep the SA pathway under control, thereby preventing its diversion by P. infestans.

langue originaleAnglais
Pages (de - à)1901-1911
Nombre de pages11
journalPlant Pathology
Volume67
Numéro de publication9
Les DOIs
étatPublié - 1 déc. 2018

Empreinte digitale

Phytophthora infestans
Salicylic Acid
Solanum tuberosum
Oligosaccharides
salicylic acid
oligosaccharides
potatoes
Chitosan
chitosan
leaves
spraying
Plant Immunity
mildews
pathogens
jasmonic acid
plant protection
Innate Immunity
plant pathogens
pectins
ethylene

Citer ceci

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title = "Oligosaccharides successfully thwart hijacking of the salicylic acid pathway by Phytophthora infestans in potato leaves",
abstract = "Potato growing is severely threatened by the late blight agent Phytophthora infestans, which is usually controlled by massive amounts of fungicides. While variety resistance is often bypassed by the pathogen, the plant innate immunity opens the way to new biological plant protection tools, e.g. the COS-OGA elicitor. This oligosaccharide composition mimics the interaction between plants and fungal pathogens as it combines chitosan oligomers (COS) with pectin-derived oligogalacturonides (OGA). Two different COS-OGA elicitors were evaluated against potato late blight: FytoSave, mainly efficient against powdery mildews, and FytoSol, a new composition still under development. In addition, a comparative study of plant defence induction was performed, focusing on the effect of repeated sprayings as well as on the stimulation of salicylic acid (SA), jasmonic acid and ethylene-related pathways during the biotrophic and necrotrophic growth stages of the pathogen. The FytoSave elicitor strongly increased the SA content but failed to induce sufficient protection against late blight, while FytoSol maintained or even decreased the free SA content in the presence of P. infestans and was completely efficient. Surprisingly, the necrotrophic development of P. infestans occurred along with a strong leaf accumulation of free SA and SA-related transcripts. This may represent an attempt by P. infestans to divert plant defences for its own benefit. Preventive sprayings with FytoSol but not FytoSave completely impeded this hijacking. FytoSol seemed to keep the SA pathway under control, thereby preventing its diversion by P. infestans.",
keywords = "COS-OGA, oligosaccharides, plant innate immunity, potato late blight, salicylic acid, Solanum tuberosum",
author = "{van Aubel}, G. and S. Serderidis and J. Ivens and A. Clinckemaillie and A. Legr{\`e}ve and B. Hause and {Van Cutsem}, P.",
year = "2018",
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Oligosaccharides successfully thwart hijacking of the salicylic acid pathway by Phytophthora infestans in potato leaves. / van Aubel, G.; Serderidis, S.; Ivens, J.; Clinckemaillie, A.; Legrève, A.; Hause, B.; Van Cutsem, P.

Dans: Plant Pathology, Vol 67, Numéro 9, 01.12.2018, p. 1901-1911.

Résultats de recherche: Contribution à un journal/une revueArticle

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AU - van Aubel, G.

AU - Serderidis, S.

AU - Ivens, J.

AU - Clinckemaillie, A.

AU - Legrève, A.

AU - Hause, B.

AU - Van Cutsem, P.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Potato growing is severely threatened by the late blight agent Phytophthora infestans, which is usually controlled by massive amounts of fungicides. While variety resistance is often bypassed by the pathogen, the plant innate immunity opens the way to new biological plant protection tools, e.g. the COS-OGA elicitor. This oligosaccharide composition mimics the interaction between plants and fungal pathogens as it combines chitosan oligomers (COS) with pectin-derived oligogalacturonides (OGA). Two different COS-OGA elicitors were evaluated against potato late blight: FytoSave, mainly efficient against powdery mildews, and FytoSol, a new composition still under development. In addition, a comparative study of plant defence induction was performed, focusing on the effect of repeated sprayings as well as on the stimulation of salicylic acid (SA), jasmonic acid and ethylene-related pathways during the biotrophic and necrotrophic growth stages of the pathogen. The FytoSave elicitor strongly increased the SA content but failed to induce sufficient protection against late blight, while FytoSol maintained or even decreased the free SA content in the presence of P. infestans and was completely efficient. Surprisingly, the necrotrophic development of P. infestans occurred along with a strong leaf accumulation of free SA and SA-related transcripts. This may represent an attempt by P. infestans to divert plant defences for its own benefit. Preventive sprayings with FytoSol but not FytoSave completely impeded this hijacking. FytoSol seemed to keep the SA pathway under control, thereby preventing its diversion by P. infestans.

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KW - COS-OGA

KW - oligosaccharides

KW - plant innate immunity

KW - potato late blight

KW - salicylic acid

KW - Solanum tuberosum

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JF - Plant Pathology

SN - 0032-0862

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