کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2180945 1095250 2012 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transcriptome analysis of enriched Golovinomyces orontii haustoria by deep 454 pyrosequencing
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
Transcriptome analysis of enriched Golovinomyces orontii haustoria by deep 454 pyrosequencing
چکیده انگلیسی

Powdery mildews are phytopathogenic ascomycetes that have an obligate biotrophic lifestyle and establish intimate relationships with their plant hosts. A crucial aspect of this plant–fungus interaction is the formation of specialized fungal infection structures termed haustoria. Although located within the cell boundaries of plant epidermal cells, haustoria remain separated from the plant cytoplasm by a host plasma membrane derivative, the extrahaustorial membrane. Haustoria are thought to represent pivotal sites of nutrient uptake and effector protein delivery. We enriched haustorial complexes from Arabidopsis thaliana plants infected with the powdery mildew fungus Golovinomyces orontii and performed in-depth transcriptome analysis by 454-based pyrosequencing of haustorial cDNAs. We assembled 7077 expressed sequence tag (EST) contigs with greater than 5-fold average coverage and analyzed these with regard to the respective predicted protein functions. We found that transcripts coding for gene products with roles in protein turnover, detoxification of reactive oxygen species and fungal pathogenesis are abundant in the haustorial EST contigs, while surprisingly transcripts encoding presumptive nutrient transporters were not highly represented in the haustorial cDNA library. A substantial proportion (∼38%) of transcripts coding for predicted secreted proteins comprises effector candidates. Our data provide valuable insights into the transcriptome of the key infection structure of a model obligate biotrophic phytopathogen.


► We sequenced a haustorial cDNA library from the powdery mildew Golovinomyces orontii.
► The 7077 expressed transcript contigs were analyzed with respect to gene functions.
► Protein turnover, detoxification and pathogenesis are over-represented functions.
► Transcripts encoding presumptive nutrient transporters were not highly represented.
► Many transcripts coding for secreted proteins comprise effector candidates.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fungal Genetics and Biology - Volume 49, Issue 6, June 2012, Pages 470–482
نویسندگان
, , , , , , , ,