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Genome-wide analysis rice transcriptional change during the early stages of false smut formation caused by Ustilaginoidea virens

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Oryza sativa Indica Group

PROVIDER: GSE39049 | GEO | 2013/11/14

SECONDARY ACCESSION(S): PRJNA169660

REPOSITORIES: GEO

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Genome-wide analysis rice transcriptional change during the early stages of false smut formation caused by Ustilaginoidea virens

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2013-11-14 | E-GEOD-39049 | biostudies-arrayexpress

Genome-wide analysis rice transcriptional change during the early stages of false smut formation caused by Ustilaginoidea virens [2011].

Project description:Rice false smut is a common fungal disease caused by Ustilaginoidea virens. As it only scatter occured in panicle at florescence, little information is known about this crop disease. In the previous study, 3 uninterrupted infecting stages were divided and each stage was monitored by Solexa/Illumina’s digital gene expression (DGE) system, and all data were submitted to NCBI (GSE32010). As the disease was greatly affected by environment and to eliminate environment factor, an experimental replication was done in 2011. Samples collection and analysis were described in GSE32010. Our results contribute to the knowledge of understanding rice molecular mechanism in response to U. virens infection.

2013-11-14 | GSE39048 | GEO

Genome-wide analysis rice transcriptional change during the early stages of false smut formation caused by Ustilaginoidea virens [2011].

2013-11-14 | E-GEOD-39048 | biostudies-arrayexpress

Genome-wide analysis rice transcriptional change during the early stages of false smut formation caused by Ustilaginoidea virens [set A]

Project description:Rice false smut is a common fungal disease caused by Ustilaginoidea virens. As it only scatter occured in panicle at florescence, little information is known about this crop disease. Here, we injected suspension spores into a susceptible indica rice cultivar 9311 booting panicle (infected water as mock) and divided the early disease symptom into 3 uninterrupted stages(S) at 6 day post inoculation (dpi): the infected pistil became expand (S1), the hyphae began to infect the bottom of anthers (S2) and the hyphae growth went on and surrounded the floral organ forming a floral-hyphae complex (S3). To gain insight into rice putatively differential responses to U. virens, all 3 infected and mock spikes with same spike length were collected and analyzed by Solexa/Illuminaâs digital gene expression (DGE) system, BGI. Our results contribute to the knowledge of understanding rice molecular mechanism in response to U. virens infection.

2013-11-14 | GSE32010 | GEO

Genome-wide analysis rice transcriptional change during the early stages of false smut formation caused by Ustilaginoidea virens [set A]

Project description:Rice false smut is a common fungal disease caused by Ustilaginoidea virens. As it only scatter occured in panicle at florescence, little information is known about this crop disease. Here, we injected suspension spores into a susceptible indica rice cultivar 9311 booting panicle (infected water as mock) and divided the early disease symptom into 3 uninterrupted stages(S) at 6 day post inoculation (dpi): the infected pistil became expand (S1), the hyphae began to infect the bottom of anthers (S2) and the hyphae growth went on and surrounded the floral organ forming a floral-hyphae complex (S3). To gain insight into rice putatively differential responses to U. virens, all 3 infected and mock spikes with same spike length were collected and analyzed by Solexa/IlluminaM-CM-"M-BM-^@M-BM-^Ys digital gene expression (DGE) system, BGI. Our results contribute to the knowledge of understanding rice molecular mechanism in response to U. virens infection. Four samples including one control (CK) and three infected (S1, S2, S3) were analyzed

2013-11-14 | E-GEOD-32010 | biostudies-arrayexpress

The false smut pathogen Ustilaginoidea virens requires rice stamens for false smut ball formation.

Project description:Rice false smut has emerged as a serious grain disease in rice production worldwide. The disease is characterized by the transformation of individual rice florets into false smut balls, which is caused by the fungal pathogen Ustilaginoidea virens. To date, little is known about the host factors required for false smut ball formation by U. virens. In this study, we identified histological determinants for the formation of false smut balls by inoculating U. virens into rice floral mutants defective with respect to individual floral parts. The results showed that U. virens could form mature false smut balls in rice floral mutants with defective pistils, but failed to develop false smut balls in the superwoman mutant lacking stamens, identifying that U. virens requires rice stamens to complete its infection cycle. Comparative transcriptome analysis indicated a list of candidate host genes that may facilitate nutrient acquisition by U. virens from the rice stamens, such as SWEET11, SWEET14 and SUT5, and genes involved in the biosynthesis of trehalose and raffinose family sugars. These data pinpoint rice stamens as the key target organ of U. virens infection and provide a valuable starting point for dissecting the molecular mechanism of false smut ball formation.

| S-EPMC7028044 | biostudies-literature

Graphene Based Electrochemical DNA Biosensor for Detection of False Smut of Rice (Ustilaginoidea virens).

Project description:False smut caused by Ustilaginoidea virens is an important rice fungal disease that significantly decreases its production. In the recent past, conventional methods have been developed for its detection that is time-consuming and need high-cost equipments. The research and development in nanotechnology have made it possible to assemble efficient recognition interfaces in biosensors. In this study, we present a simple, sensitive, and selective oxidized graphene-based geno-biosensor for the detection of rice false smut. The biosensor has been developed using a probe DNA as a biological recognition element on paper electrodes, and oxidized graphene to enhance the limit of detection and sensitivity of the sensor. Probe single-stranded DNA (ssDNA) and target ssDNA hybridization on the interface surface has been quantitatively measured with the electrochemical analysis tools namely, cyclic voltammetry, and linear sweep voltammetry. To confirm the selectivity of the device, probe hybridization with non-complementary ssDNA target has been studied. In our study, the developed sensor was able to detect up to 10 fM of target ssDNA. The paper electrodes were employed to produce an effective and cost-effective platform for the immobilization of the DNA and can be extended to design low-cost biosensors for the detection of the other plant pathogens.

| S-EPMC8200582 | biostudies-literature

UvHOG1 is important for hyphal growth and stress responses in the rice false smut fungus Ustilaginoidea virens.

Project description:Rice false smut caused by Ustilaginoidea virens is one of the most important diseases of rice worldwide. Although its genome has been sequenced, to date there is no report on targeted gene deletion in U. virens and no molecular studies on genetic mechanisms regulating the infection processes of this destructive pathogen. In this study, we attempted to generate knockout mutants of the ortholog of yeast HOG1 MAP kinase gene in U. virens. One Uvhog1 deletion mutant was identified after screening over 600 hygromycin-resistant transformants generated by Agrobacterium tumefaciens mediated transformation. The Uvhog1 mutant was reduced in growth rate and conidiation but had increased sensitivities to SDS, Congo red, and hyperosmotic stress. Deletion of UvHOG1 resulted in reduced expression of the stress response-related genes UvATF1 and UvSKN7. In the Uvhog1 mutant, NaCl treatment failed to stimulate the accumulation of sorbitol and glycerol. In addition, the Uvhog1 mutant had reduced toxicity on shoot growth in rice seed germination assays. Overall, as the first report of targeted gene deletion mutant in U. virens, our results showed that UvHOG1 likely has conserved roles in regulating stress responses, hyphal growth, and possibly secondary metabolism.

| S-EPMC4837404 | biostudies-literature

Genome-wide analysis rice transcriptional change during the early stages of false smut formation caused by Ustilaginoidea virens

Project description:Genome-wide analysis rice transcriptional change during the early stages of false smut formation caused by Ustilaginoidea virens

| PRJNA169660 | ENA

A novel transcription factor UvCGBP1 regulates development and virulence of rice false smut fungus <i>Ustilaginoidea virens</i>.

Project description:Ustilaginoidea virens, causing rice false smut (RFS) is an economically important ascomycetous fungal pathogen distributed in rice-growing regions worldwide. Here, we identified a novel transcription factor UvCGBP1 (Cutinase G-box binding protein) from this fungus, which is unique to ascomycetes. Deletion of UvCGBP1 affected development and virulence of U. virens. A total of 865 downstream target genes of UvCGBP1 was identified using ChIP-seq and the most significant KEGG enriched functional pathway was the MAPK signaling pathway. Approximately 36% of target genes contain the AGGGG (G-box) motif in their promoter. Among the targets, deletion of UvCGBP1 affected transcriptional and translational levels of UvPmk1 and UvSlt2, both of which were important in virulence. ChIP-qPCR, yeast one-hybrid and EMSA confirmed that UvCGBP1 can bind the promoter of UvPmk1 or UvSlt2. Overexpression of UvPmk1 in the ∆UvCGBP1-33 mutant restored partially its virulence and hyphae growth, indicating that UvCGBP1 could function via the MAPK pathway to regulate fungal virulence. Taken together, this study uncovered a novel regulatory mechanism of fungal virulence linking the MAPK pathway mediated by a G-box binding transcription factor, UvCGBP1.

| S-EPMC8344781 | biostudies-literature

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