Suppression of abscisic acid biosynthesis at the early infection stage of Verticillium longisporum in oilseed rape (Brassica napus).
Brassica napus
Verticillium longisporum
ABA
NCED3
RNA-Seq
Journal
Molecular plant pathology
ISSN: 1364-3703
Titre abrégé: Mol Plant Pathol
Pays: England
ID NLM: 100954969
Informations de publication
Date de publication:
12 2019
12 2019
Historique:
pubmed:
12
10
2019
medline:
27
6
2020
entrez:
12
10
2019
Statut:
ppublish
Résumé
Verticillium longisporum infects oilseed rape (Brassica napus) and Arabidopsis thaliana. To investigate the early response of oilseed rape to the fungal infection, we determined transcriptomic changes in oilseed rape roots at 6 days post-inoculation (dpi) by RNA-Seq analysis, in which non-infected roots served as a control. Strikingly, a subset of genes involved in abscisic acid (ABA) biosynthesis was found to be down-regulated and the ABA level was accordingly attenuated in 6 dpi oilseed rape as compared with the control. Gene expression analysis revealed that this was mainly attributed to the suppression of BnNCED3-mediated ABA biosynthesis, involving, for example, BnWRKY57. However, this down-regulation of ABA biosynthesis could not be observed in infected Arabidopsis roots. Arabidopsis ABA- defective mutants nced3 and aao3 displayed pronounced tolerance to the fungal infection with delayed and impeded symptom development, even though fungal colonization was not affected in both mutants. These data suggest that ABA appears to be required for full susceptibility of Arabidopsis to the fungal infection. Furthermore, we found that in both 6 dpi oilseed rape and the Arabidopsis nced3 mutant, the salicylic acid (SA) signalling pathway was induced while the jasmonic acid (JA)/ethylene (ET) signalling pathway was concomitantly mitigated. Following these data, we conclude that in oilseed rape the V. longisporum infection triggers a host-specific suppression of the NCED3-mediated ABA biosynthesis, consequently increasing plant tolerance to the fungal infection. We believe that this might be part of the virulence strategy of V. longisporum to initiate/establish a long-lasting compatible interaction with oilseed rape (coexistence), which appears to be different from the infection process in Arabidopsis.
Identifiants
pubmed: 31603283
doi: 10.1111/mpp.12867
pmc: PMC6859492
doi:
Substances chimiques
Abscisic Acid
72S9A8J5GW
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1645-1661Informations de copyright
© 2019 The Authors. Molecular Plant Pathology published by British Society for Plant Pathology and John Wiley & Sons Ltd.
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