| Full text | |
| Author(s): |
de Pedro-Jove, R.
[1, 2]
;
Puigvert, M.
[1, 2]
;
Sebastia, P.
[2]
;
Macho, A. P.
[3]
;
Monteiro, J. S.
;
Coll, N. S.
[2]
;
Setubal, J. C.
[4]
;
Valls, M.
[1, 2]
Total Authors: 8
|
| Affiliation: | [1] Univ Barcelona, Dept Genet, Barcelona, Catalonia - Spain
[2] Ctr Res Agr Genom CSIC IRTA UAB UB, Bellaterra, Catalonia - Spain
[3] Chinese Acad Sci, Shanghai Ctr Plant Stress Biol, CAS Ctr Excellence Mol Plant Sci, Shanghai 201602 - Peoples R China
[4] Univ Sao Paulo, Dept Bioquim, Sao Paulo - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | BMC Genomics; v. 22, n. 1 MAR 9 2021. |
| Web of Science Citations: | 1 |
| Abstract | |
BackgroundRalstonia solanacearum is the causal agent of bacterial wilt, a devastating plant disease responsible for serious economic losses especially on potato, tomato, and other solanaceous plant species in temperate countries. In R. solanacearum, gene expression analysis has been key to unravel many virulence determinants as well as their regulatory networks. However, most of these assays have been performed using either bacteria grown in minimal medium or in planta, after symptom onset, which occurs at late stages of colonization. Thus, little is known about the genetic program that coordinates virulence gene expression and metabolic adaptation along the different stages of plant infection by R. solanacearum.ResultsWe performed an RNA-sequencing analysis of the transcriptome of bacteria recovered from potato apoplast and from the xylem of asymptomatic or wilted potato plants, which correspond to three different conditions (Apoplast, Early and Late xylem). Our results show dynamic expression of metabolism-controlling genes and virulence factors during parasitic growth inside the plant. Flagellar motility genes were especially up-regulated in the apoplast and twitching motility genes showed a more sustained expression in planta regardless of the condition. Xylem-induced genes included virulence genes, such as the type III secretion system (T3SS) and most of its related effectors and nitrogen utilisation genes. The upstream regulators of the T3SS were exclusively up-regulated in the apoplast, preceding the induction of their downstream targets. Finally, a large subset of genes involved in central metabolism was exclusively down-regulated in the xylem at late infection stages.ConclusionsThis is the first report describing R. solanacearum dynamic transcriptional changes within the plant during infection. Our data define four main genetic programmes that define gene pathogen physiology during plant colonisation. The described expression of virulence genes, which might reflect bacterial states in different infection stages, provides key information on the R. solanacearum potato infection process. (AU) | |
| FAPESP's process: | 19/05287-2 - Determination and analysis of gene regulation network of angiogenesis in a murine model |
| Grantee: | Jhonatas Sirino Monteiro |
| Support Opportunities: | Scholarships in Brazil - Doctorate |