Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

 

Publications des scientifiques de l'IRD

Petitot Anne-Sophie, Kyndt T., Haidar R., Dereeper Alexis, Collin Myriam, Engler J. D., Gheysen G., Fernandez Diana. (2017). Transcriptomic and histological responses of African rice (Oryza glaberrima) to Meloidogyne graminicola provide new insights into root-knot nematode resistance in monocots. Annals of Botany, 119 (5), 885-899. ISSN 0305-7364

Accès réservé (Intranet IRD) Demander le PDF

Lien direct chez l'éditeur doi:10.1093/aob/mcw256

Titre
Transcriptomic and histological responses of African rice (Oryza glaberrima) to Meloidogyne graminicola provide new insights into root-knot nematode resistance in monocots
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000400982600016
AuteursPetitot Anne-Sophie, Kyndt T., Haidar R., Dereeper Alexis, Collin Myriam, Engler J. D., Gheysen G., Fernandez Diana.
SourceAnnals of Botany, 2017, 119 (5), p. 885-899. ISSN 0305-7364
RésuméBackground and Aims The root-knot nematode Meloidogyne graminicola is responsible for production losses in rice (Oryza sativa) in Asia and Latin America. The accession TOG5681 of African rice, O. glaberrima, presents improved resistance to several biotic and abiotic factors, including nematodes. The aim of this study was to assess the cytological and molecular mechanisms underlying nematode resistance in this accession. Methods Penetration and development in M. graminicola in TOG5681 and the susceptible O. sativa genotype 'Nipponbare' were compared by microscopic observation of infected roots and histological analysis of galls. In parallel, host molecular responses to M. graminicola were assessed by root transcriptome profiling at 2, 4 and 8 d postinfection (dpi). Specific treatments with hormone inhibitors were conducted in TOG5681 to assess the impact of the jasmonic acid and salicylic acid pathways on nematode penetration and reproduction. Key Results Penetration and development of M. graminicola juveniles were reduced in the resistant TOG5681 in comparison with the susceptible accession, with degeneration of giant cells observed in the resistant genotype from 15 dpi onwards. Transcriptome changes were observed as early as 2 dpi, with genes predicted to be involved in defence responses, phenylpropanoid and hormone pathways strongly induced in TOG5681, in contrast to 'Nipponbare'. No specific hormonal pathway could be identified as the major determinant of resistance in the ricenematode incompatible interaction. Candidate genes proposed as involved in resistance to M. graminicola in TOG5681 were identified based on their expression pattern and quantitative trait locus (QTL) position, including chalcone synthase, isoflavone reductase, phenylalanine ammonia lyase, WRKY62 transcription factor, thionin, stripe rust resistance protein, thaumatins and ATPase3. Conclusions This study provides a novel set of candidate genes for O. glaberrima resistance to nematodes and highlights the rice-M. graminicola pathosystem as a model to study plant-nematode incompatible interactions.
Plan de classementSciences du monde végétal [076]
Descr. géo.AFRIQUE
LocalisationFonds IRD [F B010070039]
Identifiant IRDfdi:010070039
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010070039

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Cayenne

Nouméa

Papeete

Abidjan

Dakar

Niamey

Ouagadougou

Tunis

La Paz

Quito