Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1224856 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR32375337_1.fastq.gz | Fastqsanger.gz | |||
| SRR32375337_2.fastq.gz | Fastqsanger.gz | |||
| SRR32375338_1.fastq.gz | Fastqsanger.gz | |||
| SRR32375338_2.fastq.gz | Fastqsanger.gz | |||
| SRR32375339_1.fastq.gz | Fastqsanger.gz |
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Project description:Background: Limited data are available on aluminum (Al)-toxicity-induced alterations of gene profiles in woody plants. Seedlings of Al-tolerant Citrus sinensis and Al-intolerant Citrus grandis were fertigated with nutrient solution containing 0 and 1.0 mM AlCl3•6H2O. Thereafter, we investigated the Al-toxicity-induced alterations of transcriptomics in leaves by RNA-Seq. Results: Using RNA-seq, we isolated 1162 (181) up- and 496 (234) downregulated genes from Al-treated C. grandis (C. sinensis) leaves. Clearly, gene expression was less affected by Al-toxicity in C. sinensis leaves than in C. grandis ones. Several Al-toxicity-responsive genes homologous to known Al-tolerance genes: ALUMINUM SENSITIVE 3 (ALS3), multidrug and toxic compound extrusion (MATE), glutathione S-transferase (GST), L-galactose dehydrogenase（L-GalDH) and lipoxygenase (LOX) were identified in citrus leaves. Genes related to signal transduction, and sulfur transport and metabolism might also play a role in the higher Al-tolerance of C. sinensis. Conclusions: This is the first comparative investigation of transcriptomic responses in Al-treated citrus leaves. There were common and unique mechanisms for citrus Al-tolerance. These results provide a platform for further investigating the roles of genes possibly responsible for citrus Al-tolerance.
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Project description:The metabolic response of maize source leaves to low nitrogen supply was analyzed in maize seedlings by parallel measurements of transcriptome and metabolome profiling. Inbred lines A188 and B73 were cultivated under controlled growth chamber conditions and supplied with either sufficient (15mM) or limiting (0.15mM) nitrate supply. Leaf lamina material was harvested at day 20 and day 30 after germination with the fifth and sixth leaf representing the main source leaf respectively. Four replicates were collecetd from individual plants for each combination of genotype, growth stage and nitrogen treatment. The leaf material was frozen, homogenised and aliquoted for transcriptome and metabolome analysis. The molecular data was further supplemented by phenotypic characterisation of the maize seedlings under investigation. Limited availability of nitrogen caused strong shifts in the metabolite profile of leaves. The transcriptome was less affected by the nitrogen stress but showed strong genotype and age dependent patterns. Nitrogen starvation initiated the selective down-regulation of processes involved in nitrate reduction and amino acid assimilation; ammonium assimilation related transcripts on the other hand were not influenced. Carbon assimilation related transcripts were characterized by high transcriptional coordination and general down-regulation under low nitrogen conditions. Nitrogen deprivation caused a slight accumulation of starch, but also directed increased amounts of carbohydrates into the cell wall and secondary metabolites. The decrease in N availability also resulted in accumulation of phosphate and by strong down-regulation of genes usually involved in phosphate starvation response, underlining the great importance of phosphate homeostasis control under stress conditions.
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