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MicroRNA-like RNAs exploring and expression profile in plant pathogenic fungus Fusarium oxysporum f. sp. niveum

ABSTRACT: To explore the presence of milRNA in Fusarium oxysporum f. sp. niveum (Fon) and evaluate their expression at different propagules, two categories of sRNAs were identified from Fon hyphae and microconidia by using illumina sequencing. A total of 650,960 and 561,114 unique sRNAs were obtained from the hyphae and microconidia samples. With a previously constructed pipeline to search for microRNA, we then identified 74 and 56 miRNA-like small RNAs (milRNAs) candidates in hyphae and microconidia based on the short hairpin structure analysis, respectively. Global expression analysis showed an extensively differential expression of sRNAs between two propagules. Altogether, 78 significantly differently expressed milRNAs were identified in two libraries. Target prediction revealed 2 interesting genes involved in trichothecene and necrosis and ethylene-inducing peptide 1 (NEP1) biosynthesis predicted to be down regulated by Fon-miR7696a-3p and Fon-miR6108a. These two milRNAs were further validated by qRT-PCR and showed a well consistency with sequencing. The negative correlation expression levels between these two milRNAs and their targets genes imply that they might play a role in trichothecene and NEP1 biosynthesis, and this negative regulation for toxin related gene expression are more specific in microconidia. The present study provides the firstly large-scale characterization of milRNAs in Fon and the comparison between hyphae and microconidia propagules gives a clue on how milRNAs involves in toxin biosynthesis.

ORGANISM(S): Fusarium oxysporum f. sp. niveum

PROVIDER: GSE84384 | GEO | 2016/07/15

SECONDARY ACCESSION(S): PRJNA329032

REPOSITORIES: GEO

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microRNA-like RNAs exploring and expression profile in plant pathogenic fungus Fusarium oxysporum f. sp. niveum

Project description:To explore the presence of milRNA in Fusarium oxysporum f. sp. niveum (Fon) and evaluate their expression at different propagules, two categories of sRNAs were identified from Fon hyphae and microconidia by using illumina sequencing. A total of 650,960 and 561,114 unique sRNAs were obtained from the hyphae and microconidia samples. With a previously constructed pipeline to search for microRNA, we then identified 74 and 56 miRNA-like small RNAs (milRNAs) candidates in hyphae and microconidia based on the short hairpin structure analysis, respectively. Global expression analysis showed an extensively differential expression of sRNAs between two propagules. Altogether, 78 significantly differently expressed milRNAs were identified in two libraries. Target prediction revealed 2 interesting genes involved in trichothecene and necrosis and ethylene-inducing peptide 1 (NEP1) biosynthesis predicted to be down regulated by Fon-miR7696a-3p and Fon-miR6108a. These two milRNAs were further validated by qRT-PCR and showed a well consistency with sequencing. The negative correlation expression levels between these two milRNAs and their targets genes imply that they might play a role in trichothecene and NEP1 biosynthesis, and this negative regulation for toxin related gene expression are more specific in microconidia. The present study provides the firstly large-scale characterization of milRNAs in Fon and the comparison between hyphae and microconidia propagules gives a clue on how milRNAs involves in toxin biosynthesis. microRNA-like RNAs in hyphae and microconidia were identified and compared

2016-07-15 | E-GEOD-84384 | biostudies-arrayexpress

micro-like RNAs and their targets engage in DCL2-deleted Valsa mali

Project description:Dicer proteins are mainly responsible for generating small RNAs (sRNAs). In previous study, two DCL proteins in Valsa mali, the pathogenic fungus of apple tree Valsa canker, were found to be associated with the pathogenicity and generation of sRNAs. In this study, we constructed two milRNA libraries using the the wild-type 03-8 (MVm) and Vm-DCL2 deletion mutant (MD2) strains and the differential expression of miRNA-like RNAs (milRNAs) were analyzed based on the deep-sequencing of the wild-type and Vm-DCL2 mutant, respectively. In total, by comparing the expression difference of milRNAs between MVm and MD2, it was found that 33 milRNAs were not detected in MD2, 28 milRNAs were both detected in MVm and MD2. By statistical analysis, one and 17 milRNAs showed up-regulated and down-regulated expression in MD2 compared with MVm, respectively (p<0.05). Importantly, 10 milRNAs were not detected in MD2, and identified to be DCL2 dependent milRNAs. We also identified the target genes of these milRNAs using degradome sequencing technology and found they were associated with protein phosphatase, isocitrate dehydrogenase, phosphoglycerate mutase, etc. The study will lay a foundation for the comprehensive analysis of pathogenic mechanisms of V. mali, and enrich cognition of the generation and function of fungal sRNA.

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Identification of miRNA-like RNAs in a plant pathogen fungus Sclerotinia sclerotiorum by High-throughput sequencing

Project description:This study provides a first large-scale cloning and characterization of Sclerotinia sclerotiorum milRNAs and milRNAs candidates. Two microRNA-like RNAs (milRNAs) and 42 milRNA candidates were identified by sequence analysis. These milRNAs and candidates provide new insights into the functional roles of small RNAs and adds new resources for the study of plant pathogenic fungi.

2012-05-18 | GSE28730 | GEO

Identification of miRNA-like RNAs in a plant pathogen fungus Sclerotinia sclerotiorum by High-throughput sequencing

2012-05-17 | E-GEOD-28730 | biostudies-arrayexpress

Identification of microRNA-like RNAs in the filamentous fungus Trichoderma reesei by Solexa sequencing

Project description:MicroRNAs (miRNAs) are small non-coding RNAs capable of negatively regulating gene expression. Trichoderma reesei is an industrial filamentous fungus that can secrete abundant hydrolases for cellulosic biofuels. Recently, microRNA-like RNAs (milRNAs) were discovered in several filamentous fungi rather than T. reesei. The purpose of this study was to explore the presence of milRNA in T. reesei, to characterize the differential expression of T. reesei milRNA under cellulose induction, and to reveal the target genes of milRNA involved in cellulase production. Two small RNA libraries of cellulose induction (IN) or non-induction (CON) were generated and sequenced using Solexa sequencing technology. A total of 664,463 and 529,545 unique sequences, representing 1,271 and 1,021 unique small RNAs, were obtained from the IN and CON samples, respectively. Thirteen milRNAs were finally identified in T. reesei using the hairpin structure analysis. The milRNAs profiles obtained in deep sequencing were validated by RT-qPCR assay. The miRanda program predicts a number of potential targets for T. reesei milRNAs, including several hydrolases and carbon catabolite repressor Cre1.The presence and differential expression of T. reesei milRNAs, along with their predicted targets indicate that milRNAs might play a regulatory role in cellulase induction. This work lays foundation for further functional study of fungal milRNAs and their industrial application.

2014-12-31 | GSE46679 | GEO

Global transcriptional regulation by small non-coding RNAs is required for the response to injury of a filamentous fungus

Project description:The ability to respond to injury is essential for the survival of an organism and involves analogous mechanisms in animals and plants. Such mechanisms integrate coordinated genetic and metabolic reprogramming events requiring fine tuned regulation by small RNAs for adequate healing of the wounded area. We previously reported that in response to injury, the filamentous fungus Trichoderma atroviride uses molecular mechanisms very similar to those of plants and animals. These processes lead to the formation of new hyphae and the development of asexual reproduction structures (conidiophores). Here we show that regulation by sRNAs of nitrogen metabolic processes and the cellular redox balance is necessary to carry out the correct response to injury. We further discover microRNA-like RNAs (milRNAs) related with the development of conidiophores. Finally, using a loss-of-function and transcriptomic approach, we demonstrate that a milRNA plays a central role in growth and hyphal regeneration in the filamentous fungus T. atroviride, which regulates signaling and cell proliferation at the transcriptional level. Although many classes of small RNAs have been profiled in fungi, and showed to be important for contending with different types of stress, this is the first report showing a physiological function of a milRNA in fungi.

2018-12-05 | GSE123330 | GEO

Exploring pathogenic microRNAs of rice sheath blight pathogen

Project description:We constructed seven small RNA libraries of Rhizoctonia solani AG1 IA and sequenced using Illumina GA II. The seven samples include mycelium cultured on PDA without rice incubated, 6 different stages at 10 hours (10h), 18h, 24h, 32h, 48h and 72h spanning the Rhizoctonia solani AG1 strains infection rice. We identified miRNA-like small RNAs (milRNAs) using MIREAP and mirdeep2. The milRNAs were used for further analysis of interactions between milRNA and mRNA that may involve in plant-infection.

2016-04-23 | GSE68236 | GEO

Adaptive regulation of pathogenic factors by microRNA-like RNA directed mRNA cleavage in plant pathogenic fungus Valsa mali

Project description:MicroRNAs (miRNAs) play important roles by regulating the expression of target genes in plant and animal. However, little known about mechanism of fungal miRNA-like RNAs (milRNAs) regulating target gene restricts their functional exploration. In this study, multiple omics were used to identify the milRNAs and their target genes in a phytopathogenic fungus Valsa mali. Many candidate pathogenic factors were found to be regulated by milRNA-directed cleavage way. Absence or downregulated expression of Vm-milRNAs promote expression of candidate pathogenic factors during V. mali infection. Vm-milR16 is a significantly downregulated milRNA during V. mali infection, resulting in significantly upregulated expression of three target genes: VmSNF1, VmDODA, and VmHy1. Overexpression of Vm-milR16 significantly reduces the pathogenicity of V. mali. And all the three target genes of Vm-milR16 are required for the full pathogenicity of V. mali. Further analysis revealed that VmSNF1 regulates the pathogenicity by affecting the expression of pectinase genes during V. mali infection. And all the three target genes are essential for oxidative stress response during V. mali-host interaction. Vm-milRNAs may help V. mali to intelligently use limited resources and adaptively regulate pathogenicity by enhancing expression of pathogenic factors and fitness during infection.

2019-05-10 | GSE130968 | GEO

Description: Coding region for tri18 and tri17 genes of Trichoderma albolutescens CBS 119286

Project description:Cited by: "A cytochrome P450 monooxygenase gene required for biosynthesis of the trichothecene toxin harzianum A in Trichoderma".

| PRJEB33326 | ENA

Transcription profiling of Arabidopsis seedlings exposed to ANep1 Treatment

Project description:In order to study the Nep1 responsive genes in Arabidopsis, experiments were performed with the Affymetrix GeneChip Arabidopsis ATH1 Genome Array (Santa Clara, CA; Cat # 900385). Experiment Overall Design: Seven-day old Arabidopsis seedlings were exposed to Nep1 (10 ug/mL) treatment or using sterilized, deionized H2O as a control for 30 min. Two independent biological replications were conducted using two independent samples and two microarrays.

2008-06-13 | E-GEOD-4638 | biostudies-arrayexpress

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