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Malus domestica

ABSTRACT: Malus domestica RNA-sequencing to explore key genes associated with apple fruit harvest date

PROVIDER: PRJNA1045838 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26990534_1.fastq.gz	Fastqsanger.gz
	SRR26990534_2.fastq.gz	Fastqsanger.gz
	SRR26990535_1.fastq.gz	Fastqsanger.gz
	SRR26990535_2.fastq.gz	Fastqsanger.gz
	SRR26990536_1.fastq.gz	Fastqsanger.gz

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Transcriptional profiling of Granny Smith apple peel (Malus x domestica Borkh) at harvest between contrasted years for scald incidence

Project description:Granny Smith apples (Malus x domestica Borkh) were harvested at early physiological mature stage in 2014, 2015 and 2017 and phenotyped for scald incidence after long time cold storage. Differential analyses were set-up for peel samples collected at harvest between fruit batches with low or high scald incidence.

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Interference with ethylene perception at receptor level sheds light on auxin and transcriptional circuits associated with climacteric ripening of apple fruit (Malus x domestica Borkh.)

Project description:Apple (Malus x domestica Borkh.) is a model fruit species to study the metabolic changes occurring at the onset of ripening as well the physiological mechanism governed by the hormone ethylene. In this survey, to dissect the climacteric interplay in apple, a multidisciplinary approach was employed. To this end, a comprehensive analysis of gene expression together with the investigation of several physiological entities (texture, volatilome and polyphenolic compounds) was carried out throughout fruit development and ripening. The transcriptomic profiling was conducted with two microarray platforms, a custom array dedicated to fruit ripening pathways (iRIPE) and a whole genome array specifically enriched of ripening related genes for apple (WGAA). The transcriptomic and phenotypic changes following the application of 1-methylcyclopropene (1-MCP), an ethylene inhibitor, were also highlighted. The suppression of ethylene modified and delayed the ethylene receptors turnover, leading to important modifications in the overall fruit physiology. The integrative comparative network analysis showed both negative and positive correlations between ripening related transcripts and accumulation of specific metabolites or texture components. The ripening distortion caused by the inhibition of the ethylene perception besides affecting the ethylene and texture control, stimulated the de-repression of auxin related genes, transcription factors and photosynthethic genes. In the end, the comprehensive repertoire of results obtained here step forwards in the elucidation of the multi-layered control of ethylene, hypothesizing a possible hormonal cross-talk coupled with a transcriptional regulation. 48 samples analyzed; 8 stages have been identified over the fruit development and ripening (from flower to post harvest ripening) of apple fruit belonging to two apple cultivars (Golden Delicious and Granny Smith), ending with 16 samples (3 replacates for each sample)

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Effect of 1-MCP and ozone post-harvest treatments on the transcriptional profiling of Granny Smith apple peel (Malus x domestica Borkh) after cold storage.

Project description:Granny Smith apples (Malus x domestica Borkh) grown in commercial orchards were harvested at physiological mature stage and maintained 6 months in cold storage with or without 1-MCP post-harvest treatment, and with or without enriched ozone atmosphere.

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Project description:Plant resistance inducers (PRIs) and nitrogen (N) nutrition are both factors known to act on plant defence but their interaction has been little studied and needs further research. The objective of the study was to further characterize this interaction on apple (Malus domestica) plantlets at the molecular level. The produced dataset allows the investigation of the molecular mechanisms underlying: i) the biotic resistance induced by ASM treatments on apple seedlings, ii) their response to different nitrogen (N) status (N limitation or subsequent N resupply), iii) the combination of both N status and ASM treatment.

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Integrative approach combining transcriptomic assay with physical and metabolite analysis reveal novel clues about the regulatory mechanism governing the climacteric ripening physiology in apple (Malus x domestica Borkh.) [WGAA]

Project description:Apple (Malus x domestica Borkh.) is a model fruit species to study the metabolic changes occurring at the onset of ripening as well the physiological mechanism governed by the hormone ethylene. In this survey, to dissect the climacteric interplay in apple, a multidisciplinary approach was employed. To this end, a comprehensive analysis of gene expression together with the investigation of several physiological entities (texture, volatilome and polyphenolic compounds) was carried out throughout fruit development and ripening. The transcriptomic profiling was conducted with two microarray platforms, a custom array dedicated to fruit ripening pathways (iRIPE) and a whole genome array specifically enriched of ripening related genes for apple (WGAA). The transcriptomic and phenotypic changes following the application of 1-methylcyclopropene (1-MCP), an ethylene inhibitor, were also highlighted. The suppression of ethylene modified and delayed the ethylene receptors turnover, leading to important modifications in the overall fruit physiology. The integrative comparative network analysis showed both negative and positive correlations between ripening related transcripts and accumulation of specific metabolites or texture components. The ripening distortion caused by the inhibition of the ethylene perception besides affecting the ethylene and texture control, stimulated the de-repression of auxin related genes, transcription factors and photosynthethic genes. In the end, the comprehensive repertoire of results obtained here step forwards in the elucidation of the multi-layered control of ethylene, hypothesizing a possible hormonal cross-talk coupled with a transcriptional regulation. whole genome array specifically enriched of ripening related genes for apple (WGAA) with two cultivars (Golden Delicious and Granny Smith)

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Project description:Genome-wide DNA methylation analysis between long-term in vitro shoot culture and acclimatized apple plants DNA methylation is a process of epigenetic modification that can alter the functionality of a genome. Using whole-genome bisulfite sequencing, this study quantify the level of DNA methylation in the epigenomes of two diploid apple (Malus x domestica) scion cultivars ('McIntosh' and 'Húsvéti rozmaring') derived from three environmental conditions: in vivo mother plants in an orchard, in vitro culture, and acclimatized in vitro plants. The global DNA methylation levels were not dependent on the source of plant material. Significant differences in DNA methylation were identified in 586 out of 45,116 genes, including promoter and coding sequences, and classified as differentially methylated genes (DMGs). Differential methylation was visualised by an MA plot and functional genomic maps were established for biological processes, molecular functions and cellular components. Considering the DMGs, in vitro tissue culture resulted in the highest level of methylation, which decreased after acclimatization and tended to be similar to that in the mother tree. Methylation patterns of the two scions differed, indicating cultivar-specific epigenetic regulation of gene expression during adaptation to various environments. After selecting genes that displayed differences larger than ±10% in CpG and CHG contexts, or larger than ±1.35% in the CHH context from among the DMGs, they were annotated in Blast2GO v5.1.12 for Gene Ontology. These DNA methylation results suggest that epigenetic changes may contribute to the adaptation of apple to environmental changes by modifying gene expression.

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