Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1128345 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR29548759.fastq.gz | Fastqsanger.gz | |||
| SRR29548760.fastq.gz | Fastqsanger.gz | |||
| SRR29548761.fastq.gz | Fastqsanger.gz | |||
| SRR29548762.fastq.gz | Fastqsanger.gz | |||
| SRR29548763.fastq.gz | Fastqsanger.gz |
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Project description:The Tsw gene conferring Tomato spotted wilt virus (TSWV) resistance in Capsicum chinense breaks down at high temperatures. Here, we performed RNA-Seq analysis under different temperature conditions to uncover the resistance breakdown mechanism using TSWV-resistant C. chinense ‘PI152225’ and susceptible ‘Habanero’. RNA-Seq analysis revealed only a few differentially expressed genes (DEGs) at 1 dpi but 2,096 and 551 DEGs between plants at 25°C and 30°C at 5 dpi. At 5 dpi, there were more upregulated than downregulated DEGs at both temperatures. Gene ontology analysis revealed 30 enriched biological process terms and nine molecular function terms that were enriched among upregulated DEGs at 25°C. We performed KEGG analysis with 805 upregulated DEGs at both temperatures to explore the mechanism underlying resistance breakdown at high temperature. The DEGs were mapped into 10 KEGG pathways. ACC oxidase genes in the ethylene biosynthesis pathway were differentially expressed upon pathogen challenge. Most DEGs from the biological process, molecular function, and cellular components categories involved in resistance responses were downregulated at 30°C. Finally, genes involved in abscisic acid-mediated stress signaling were differentially expressed at high temperature. These results shed light on host–virus interactions and temperature-dependent resistance mechanisms in pepper at the molecular level.
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Project description:First report of Capsicum chlorosis virus in pepper in Greece
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Project description:Hybrid chlorosis, one of the hybrid incompatibilities, has frequently been reported in inter- and intraspecific crosses of allopolyploid wheat. In our previous study, hybrid chlorosis was observed in the wheat triploids between a tetraploid wheat cultivar Langdon and four Ae. tauschii accessions and in their derived synthetic hexaploids. However, the molecular mechanisms underlying hybrid chlorosis are not well understood. Here, we performed cytological and comparative gene expression analyses in leaves to characterize the abnormal growth in wheat synthetics showing mild and severe chlorosis symptom. In addition, disease resistance was comparatively assessed. A number of carbohydrate metabolism- and defense-related genes were markedly up-regulated in the hybrid chlorosis lines, and abnormal chloroplasts were formed in the mesophyll cells before the leaves turned to be yellowish. The mild chlorosis plants showed increased resistance to a wheat blast fungus, although little significant differences of agricultural traits were found between the wild-type and mild chlorosis-showing plants. These observations suggest that the senescence processes might be accelerated in the hybrid chlorosis lines of wheat synthetics. Moreover, the negative effects on biomass can be minimized and the substantial fitness may be obtained under pathogen-polluted conditions in the mild chlorosis-showing wheat synthetics. Expression patterns were compared between a wild-type synthetic wheat line (as a reference) and two hybrid chlorosis-showing hybrid chlorosis lines. Total RNA samples were isolated from the 3-week-old leaf tissues. Two independent experiments were conducted in each line.
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Project description:Hybrid chlorosis, one of the hybrid incompatibilities, has frequently been reported in inter- and intraspecific crosses of allopolyploid wheat. In our previous study, hybrid chlorosis was observed in the wheat triploids between a tetraploid wheat cultivar Langdon and four Ae. tauschii accessions and in their derived synthetic hexaploids. However, the molecular mechanisms underlying hybrid chlorosis are not well understood. Here, we performed cytological and comparative gene expression analyses in leaves to characterize the abnormal growth in wheat synthetics showing mild and severe chlorosis symptom. In addition, disease resistance was comparatively assessed. A number of carbohydrate metabolism- and defense-related genes were markedly up-regulated in the hybrid chlorosis lines, and abnormal chloroplasts were formed in the mesophyll cells before the leaves turned to be yellowish. The mild chlorosis plants showed increased resistance to a wheat blast fungus, although little significant differences of agricultural traits were found between the wild-type and mild chlorosis-showing plants. These observations suggest that the senescence processes might be accelerated in the hybrid chlorosis lines of wheat synthetics. Moreover, the negative effects on biomass can be minimized and the substantial fitness may be obtained under pathogen-polluted conditions in the mild chlorosis-showing wheat synthetics.
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Project description:denitrification and elevated temperature
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