RT Conference Proceedings
T1 De novo analysis of the haustorial transcriptome of the cucurbit powdery mildew fungus Podosphaera xanthii reveals new candidate secreted effector proteins
A1 Polonio Escalona, Alvaro Acisclo
A1 Seoane, Pedro
A1 De-Vicente-Moreno, Antonio
A1 Pérez-García, Alejandro
K1 Podospora
K1 Oídios
AB Backgrounds. Cucurbit crops are affected, among other pathogens, by the obligate biotrophic fungus Podosphaera xanthii, the main causal agent of powdery mildew in cucurbits. This fungus develops a specialized structure of parasitism termed haustorium. Haustoria are developed into epidermal cells and are responsible for nutrients uptake and effectors delivery. Objectives. The aim of this study was to obtain the haustorial transcriptome of P. xanthii to complete the panel of effector candidates of this fungal pathogen.   Methods. To obtain the haustorial transcriptome, we have developed an effective method for isolation of haustoria without contaminants by flow cytometry. The cDNA library was built using a combination of dT primers and random primers followed by a depletion of ribosomal sequences. Sequencing was carried out by Illumina NextSeq550.Conclusions. After bioinformatic analysis, we were able to identify 25 new effector candidates secreted by the classic pathway (with signal peptide) and 269 new candidates secreted by the non-classic pathway (without signal peptide). Most proteins had no functional annotation. By protein modelling and ligand predictions, we are now being able to assign putative functions to some of these candidates to select those with potential roles in pathogenesis for subsequent functional in vivo analysis by HIGS (host-induced gene silencing). By these approaches, we are starting to shed some light into the molecular mechanisms of pathogenesis in this very important pathogen of cucurbits.
YR 2017
FD 2017-07-20
LK http://hdl.handle.net/10630/14279
UL http://hdl.handle.net/10630/14279
LA eng
NO This work was supported by a grant from the Ministerio de Economía y Competitividad (AGL2013-41938-R), co-financed with FEDER funds (EU). A grant form Universidad de Málaga, Campus de Excelencia Internacional Andalucía Tech, is also acknowledged.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 24 ene 2026