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Peer-reviewedCC BY 4.0Environmental Microbiology

Variations in Soil Microbiome Assembly Determine Hatching Induction of the Carrot Cyst Nematode Heterodera carotae

  • Marine Biget1
  • Nathan Vannier1
  • Kévin Gazengel1
  • Bruno Marquer1
  • Juliette Linglin1
  • Christophe Langrume1
  • Catherine Porte1
  • Sylvain Chéreau1
  • Didier Fouville1
  • Sylvain Fournet1
  • Lionel Lebreton1
  • Josselin Montarry1
  1. 1IGEPP, INRAE, Institut Agro, Univ Rennes, Le Rheu, France.
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Abstract

Plants shape their microbiota through root exudation to resist environmental constraints. These plant's exuded metabolites also serve as hatching signals for cyst nematodes, a major crop pest, to trigger their parasitic cycle. The “suicide hatching” strategy takes advantage of these exudates as a decoy, inducing hatching of juveniles in the absence of the host plant. We questioned here the effect of the soil microbiota on the suicide hatching induction. We used the carrot cyst nematode ( Heterodera carotae, Jones) and evaluated the impact of three rotation crops (leek, turnip, and barley) and their associated fungal and bacterial communities on the hatching efficacy of carrot exudates in two types of soil. Our results indicated that hatching induction is lower when leek was previously cultivated. By analysing the covariation between hatching and microbiota composition, we identified fungal ASVs, notably Fusarium equiseti, whose abundances correlate significantly with nematode hatching. We validated that diacetoxyscirpenol, a compound produced by this species, significantly reduces nematode hatching induction. Our results demonstrated that rotation crops modulate the composition of the soil microbiome and can promote the abundance of fungi modulating the suicide hatching success. These results provide insights into plant‐microbiota‐nematode interactions for optimizing pest biocontrol strategies.

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Cite

BibTeXRIS
BibTeX
@article{biget2026variations,
  title = {{Variations in Soil Microbiome Assembly Determine Hatching Induction of the Carrot Cyst Nematode Heterodera carotae}},
  author = {Marine Biget and Nathan Vannier and Kévin Gazengel and Bruno Marquer and Juliette Linglin and Christophe Langrume and Catherine Porte and Sylvain Chéreau and Didier Fouville and Sylvain Fournet and Lionel Lebreton and Josselin Montarry},
  journal = {Environmental Microbiology},
  year = {2026},
  month = oct,
  doi = {10.1111/1462-2920.70457},
  url = {https://hal.inrae.fr/hal-05805690v1},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Variations in Soil Microbiome Assembly Determine Hatching Induction of the Carrot Cyst Nematode Heterodera carotae
AU  - Marine Biget
AU  - Nathan Vannier
AU  - Kévin Gazengel
AU  - Bruno Marquer
AU  - Juliette Linglin
AU  - Christophe Langrume
AU  - Catherine Porte
AU  - Sylvain Chéreau
AU  - Didier Fouville
AU  - Sylvain Fournet
AU  - Lionel Lebreton
AU  - Josselin Montarry
PY  - 2026
DA  - 2026/10/01
JO  - Environmental Microbiology
DO  - 10.1111/1462-2920.70457
UR  - https://hal.inrae.fr/hal-05805690v1
AB  - Plants shape their microbiota through root exudation to resist environmental constraints. These plant's exuded metabolites also serve as hatching signals for cyst nematodes, a major crop pest, to trigger their parasitic cycle. The “suicide hatching” strategy takes advantage of these exudates as a decoy, inducing hatching of juveniles in the absence of the host plant. We questioned here the effect of the soil microbiota on the suicide hatching induction. We used the carrot cyst nematode ( Heterodera carotae, Jones) and evaluated the impact of three rotation crops (leek, turnip, and barley) and their associated fungal and bacterial communities on the hatching efficacy of carrot exudates in two types of soil. Our results indicated that hatching induction is lower when leek was previously cultivated. By analysing the covariation between hatching and microbiota composition, we identified fungal ASVs, notably Fusarium equiseti, whose abundances correlate significantly with nematode hatching. We validated that diacetoxyscirpenol, a compound produced by this species, significantly reduces nematode hatching induction. Our results demonstrated that rotation crops modulate the composition of the soil microbiome and can promote the abundance of fungi modulating the suicide hatching success. These results provide insights into plant‐microbiota‐nematode interactions for optimizing pest biocontrol strategies.
SN  - 1462-2912
SN  - 1462-2920
ER  -