Global gene expression in two potato cultivars in response to 'Candidatus Liberibacter solanacearum' infection.
BMC Genomics
; 18(1): 960, 2017 Dec 11.
Article
em En
| MEDLINE
| ID: mdl-29228896
ABSTRACT
BACKGROUND:
Transcriptomic analyses were performed to compare the molecular responses of two potato varieties previously shown to differ in the severity of disease symptoms due to infection by "Candidatus Liberibacter solanacearum" (Lso), the causative agent of Zebra Chip in potato. A factorial design utilizing the two varieties and psyllids either harboring Lso or without bacteria was used to discriminate varietal responses to pathogen infection versus psyllid feeding. Plant response was determined from leaf samples 3 weeks after infection.RESULTS:
In response to Lso infection, 397 genes were differentially expressed in the variety Atlantic (most susceptible) as compared to 1027 genes in Waneta. Over 80% of the transcriptionally-changed genes were down-regulated in both varieties, including genes involved in photosynthesis or primary and secondary metabolism. Many of the Lso-responsive genes involved in stress responses or hormonal pathways were regulated differently in the two potato varieties.CONCLUSIONS:
This study focused on the time point just prior to the onset of symptom development and provides valuable insight into the mechanisms of Liberibacter pathogenicity, especially the widespread suppression of plant gene expression, including genes involved in plant defenses.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças das Plantas
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Rhizobiaceae
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Solanum tuberosum
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Transcriptoma
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article