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Arabidopsis thaliana

ABSTRACT: Ribosome footprints sequencing from Arabidopsis thaliana roots during Pi starvation

PROVIDER: PRJNA385669 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5514380.fastq.gz	Fastqsanger.gz
	SRR5514390.fastq.gz	Fastqsanger.gz
	SRR5514381.fastq.gz	Fastqsanger.gz
	SRR5514391.fastq.gz	Fastqsanger.gz
	SRR5514382.fastq.gz	Fastqsanger.gz

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Expression data from Arabidopsis thaliana under phosphate starvation stress

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Expression data from Arabidopsis thaliana PHR1 primary targets genes under phosphate starvation stress

Project description:We performed a transcriptomic analysis of Pi starvation responses in Arabidopsis thaliana (Columbia-0) phr1 mutant plants expressing PHR1 in presence of cicloheximide, that inhibit protein translation, thus preventing any effect of PHR1 on the expression of indirect targets. Results show the primary target genes of PHR1 in the responses to Pi starvation.

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Expression data from Arabidopsis thaliana under phosphate starvation stress

Project description:We performed a transcriptomic analysis of Pi starvation responses in Arabidopsis thaliana (Columbia-0) wild type plants under phosphate starvation stress and in plants with altered PHR1(-like) activity, comparing mutants of phr1 and phr1-phl1 grown in phosphate-lacking medium. Results show the central role of PHR1 and functionally redundant members of its family in the control of transcriptional responses to Pi starvation. The analysis was performed in wild-type plants grown for seven days in complete (+Pi) and Pi-lacking (-Pi) Johnson solid media and the single phr1 and double phr1-phl1 mutants grown for 7 days in –Pi medium. Three independent biological samples of total RNA from shoot and root were hybridized separately.

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Project description:Pi availability is a significant limiting factor for plant growth in both natural and agricultural systems. To cope with such limiting conditions, plants have adapted developmental and biochemical strategies to enhance Pi acquisition and to avoid starvation. A myriad of genes that are involved in the regulation and display of these strategies have been identified. However, the possible epigenetic components regulating the phosphate starvation responses have not been thoroughly investigated. DNA methylation is a major epigenetic mark involved in diverse biological processes and it may play a critical role in Pi starvation stress adaptation, also changes in DNA methylation can lead to a unique gene expression pattern in response to specific developmental and environmental conditions. Here in we demonstrate that non-CpG DNA methylation is required for proper expression of a number of Pi-limitation responsive genes in Arabidopsis thaliana and results in altered morphologic and physiologic phosphate starvation responses.Our data suggest that DNA methylation is involved in the modulation of Pi starvation responses via the transcriptional regulation of a set of phosphate-starvation responsive genes.

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Arabidopsis thaliana Raw sequence reads

Project description:Phosphate (Pi) deficiency alters root hair length and frequency as a means of increasing the absorptive surface area of roots. Three partly redundant single R3 MYB proteins, CAPRICE (CPC), ENHANCER OF TRY AND CPC1 (ETC1) and TRIPTYCHON (TRY), positively regulate the root hair cell fate by participating in a lateral inhibition mechanism. To identify putative targets and processes that are controlled by these three transcription factors (TFs), we conducted transcriptional profiling of roots from Arabidopsis thaliana wild-type plants, and cpc, etc1 and try mutants grown under Pi-replete and Pi-deficient conditions using RNA-seq.

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SHORT-ROOT Stabilizes PHOSPHATE1 to Regulate Phosphate Allocation in Arabidopsis

Project description:Coordinated distribution of Pi between roots and shoots is an important process that plants use to maintain Pi homeostasis. SHR (SHORT-ROOT) is well-characterized for its function in root radial patterning1-3. Here, we demonstrate a new role of SHR in controlling phosphate (Pi) allocation from roots to shoots by regulating PHOSPHATE1 (PHO1) in the root differentiation zone. We recovered a weak mutant allele of SHR in Arabidopsis which accumulates much less Pi in the shoot and shows constitutive Pi starvation response (PSR) under Pi-sufficient condition. Besides, Pi starvation suppresses SHR protein accumulation and releases its inhibition on the HD-ZIP Ⅲ transcription factor PHB. PHB accumulates and directly binds the promoter of PHO2 to upregulate its transcription, resulting in PHO1 degradation in the xylem-pole pericycle cells. Our findings reveal a previously unrecognized mechanism of how plants repress Pi translocation from roots to shoots in response to Pi starvation.

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