Transcriptomics

Dataset Information

41

Gene expression during early sporulation in Phytophthora infestans


ABSTRACT: Transcriptional changes during asexual sporangia formation by the late blight pathogen Phytophthora infestans were identified using microarrays representing 15,650 genes and RNA from sporulation time-courses, purified spores, and sporulation-defective strains. Results were confirmed by reverse transcription-polymerase chain reaction analyses of sporulation on artificial media and infected tomato. During sporulation, about 12% of genes were found to be up-regulated and 5% down-regulated. The most prevalent induced genes had functions in signal transduction, flagella assembly, cellular organization, metabolism, and molecular or vesicular transport. Distinct patterns of expression were discerned based on the kinetics of mRNA induction and their persistence in sporangia. For example, most flagella-associated transcripts were induced very early in sporulation and maintained in sporangia, while many participants in metabolism or small molecule transport were also induced early but had low levels in sporangia. Data from this study are a resource for understanding sporogenesis, which is critical to the pathogenic success of P. infestans and other oomycetes. Two arrays were analyzed for each type of biological material. For each of the replicates, RNA was extracted from 2-3 different cultures and pooled. Therefore, a total of 4-6 biological replicates were analyzed for each type of tissue.

ORGANISM(S): Phytophthora infestans  

SUBMITTER: Audrey Ah-Fong  Reena D Narayan   KyoungSu Kim   Howard S Judelson    

PROVIDER: E-GEOD-13580 | ArrayExpress| 2014-05-01

SECONDARY ACCESSION(S): GSE13580PRJNA110685

REPOSITORIES: GEO, ArrayExpress

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Publications

Gene expression changes during asexual sporulation by the late blight agent Phytophthora infestans occur in discrete temporal stages.

Judelson Howard S HS   Narayan Reena D RD   Ah-Fong Audrey M V AM   Kim Kyoung Su KS  

Molecular genetics and genomics : MGG 20081203 2


Transcriptional changes during asexual sporangia formation by the late blight pathogen Phytophthora infestans were identified using microarrays representing 15,646 genes and RNA from sporulation time-courses, purified spores, and sporulation-defective strains. Results were confirmed by reverse transcription-polymerase chain reaction analyses of sporulation on artificial media and infected tomato. During sporulation, about 12% of genes were up-regulated compared to vegetative hyphae and 5% were d  ...[more]

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