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Role of cis-zeatin in root responses to phosphate starvation

ABSTRACT: Role of cis-zeatin in root responses to phosphate starvation

PROVIDER: PRJNA542647 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9047782.fastq.gz	Fastqsanger.gz
	SRR9047783.fastq.gz	Fastqsanger.gz
	SRR9047784.fastq.gz	Fastqsanger.gz
	SRR9047785.fastq.gz	Fastqsanger.gz

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Role of cis-zeatin in root responses to phosphate starvation

Project description:In this work we show that root illumination influences Pi starvation response, enhancing the root and shoot growth arrest and limiting the root/shoot ratio as well as root hair elongation. A transcriptomic study in dark-grown roots (DGR) roots identifies several genes that respond to Pi deficiency that were not previously reported. Hormone profiling revealed that Pi starvation reduces the level of trans-Zeatin (tZ) but significantly increases the amount of cis-Zeatin (cZ) and cis-Zeatin Riboside (cZR). We have analyzed the transcriptomic response of Arabidopsis roots to phosphate starvation combined with cis- or trans-zeatin treatments for 8 hours.

2019-11-01 | GSE131056 | GEO

Role of cis-zeatin in root responses to phosphate starvation

Project description:Role of cis-zeatin in root responses to phosphate starvation

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Role of cis-zeatin in root responses to phosphate starvation

Project description:In this work we show that root illumination influences Pi starvation responses, enhancing the root and shoot growth arrest and limiting the root/shoot ratio as well as root hair elongation. A comparative transcriptomic study using dark-grown roots (DGR) roots seedlings taht were grown with or without phosphate identifies several genes that respond to Pi deficiency that were not previously reported, likely by the negative effect of the root illumination.

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The phosphate starvation response regulator PHR2 antagonizes arbuscule maintenance in Medicago

Project description:• Phosphate starvation response (PHR) transcription factors play essential roles in regulating phosphate uptake in plants through binding to the P1BS cis-element in the promoter of phosphate starvation response genes. Recently, PHRs were also shown to positively regulate arbuscular mycorrhizal colonization in rice and lotus by controlling the expression of a large set of symbiotic genes. However, their role in arbuscule development has remained unclear. In Medicago we previously showed that arbuscule degradation is controlled by two SPX proteins that are highly expressed in arbuscule-containing cells. Since SPX proteins bind to PHRs and repress their activity in a phosphate-dependent manner, we investigated whether arbuscule maintenance is also regulated by PHR. • Here, we show that MtPHR2 is a major regulator of the phosphate starvation response in Medicago. Knock-out of mtphr2 showed reduced phosphate starvation response, symbiotic gene expression and AM colonization levels. However, the arbuscules that formed showed less degradation, suggesting a negative role for PHR2 in arbuscule maintenance. This was supported by the observation that overexpression of MtPHR2 led to enhanced degradation of arbuscules. Although many arbuscule-induced genes contain P1BS elements in their promoters, we found that the P1BS cis-elements in the promoter of the symbiotic phosphate transporter MtPT4 are not required for arbuscule-containing cell specific expression. • These results indicate that MtSPX1 and MtSPX3 control arbuscule maintenance independent from PHR2. While MtPHR2 potentiates symbiotic gene expression and colonization, its activity in arbuscule-containing cells needs to be tightly controlled to maintain a successful symbiosis in Medicago.

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Tomato phosphate starvation

Project description:Transcriptomic analysis of the phosphate-starvation response of tomato plants

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Project description:ngs2013_14_rnadapt-rnadapt-Identification of new elements (non-coding-RNA) controlling root growth in response to phosphate.-Plants (Columbia er 105, or Landsberg erecta) were grown one week on media with Phosphate (+P) and then transfered on media with (+P) or without (-P = P starvation) for 1h or 2h. Root apices were harvested and total RNA extracted for RNA sequencing.

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Phosphate Starvation of Maize Inhibits Lateral Root Formation and Alters Gene Expression in the Lateral Root Primordium Zone

Project description:Low phosphate concentrations are frequently a constraint for maize growth and development, and therefore, enormous quantities of phosphate fertilizer are expended in maize cultivation, which increases the cost of planting. Low phosphate stress not only increases root biomass but can also cause significant changes in root morphology. Low phosphate availability has been found to favor lateral root growth over primary root growth by dramatically reducing primary root length and increasing lateral root elongation and lateral root density in Arabdopsis. While in our assay when inbred line Q319 subjected to phosphate starvation, The numbers of lateral roots and lateral root primordia were decreased after 6 days of culture in a low phosphate solution (LP) compared to plants grown under normal conditions (sufficient phosphate, SP), and these differences were increased associated with the stress caused by phosphate starvation. However, the growth of primary roots appeared not to be sensitive to low phosphate levels. This is very different to Arabidopsis. To elucidate how low phosphate levels regulate root modifications, especially lateral root development, a transcriptomic analysis of the 1.0-1.5 cm lateral root primordium zone (LRZ) of maize Q319 treated after 2 and 8 days by low phosphate was completed respectively. The present work utilized an Arizona Maize Oligonucleotide array 46K version slides, which contained 46,000 maize 70-mer oligonucleotides designated by TIGR ID, and the sequence information is available at the website of the Maize Oligonucleotide Array Project as the search item representing the >30,000 identifiable unique maize genes (details at http://www.maizearray.org). Keywords: low phosphate, Lateral Root Primordium Zone, maize

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Functions of four members of PHR1 family in plant responses to phosphate starvation

Project description:We analyzed the RNA expression profiles of the mutants of four memebrs of Arabidopsis PHR1 family to understand their roles in regulating plant responses to phosphate 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.

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