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Expression data of young Arabidopsis root plants experiencing either phosphate deficiency, iron deficiency or both, for 3hours, 6 hours and 9 hours in comparison to plants fully supply with nutrients

ABSTRACT: Plants could sense and respond very rapidly to a change in nutrient availability. At a developmental level, phosphate deficiency leads to a rapid repression of the primary root growth. This response is alleviated when iron is also absent from the medium. We used microarrays to detail the global programme of gene expression during phosphate and/or iron deficiency and to identify gene regulatory network involved in the control of the primary root growth in response to phosphate deficiency.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE171449 | GEO | 2023/03/24

REPOSITORIES: GEO

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Expression data of young Arabidopsis root plants experiencing either phosphate deficiency, iron deficiency or both, for 3hours, 6 hours and 9 hours in comparison to plants fully supply with nutrients

Project description:Expression data of young Arabidopsis root plants experiencing either phosphate deficiency, iron deficiency or both, for 3hours, 6 hours and 9 hours in comparison to plants fully supply with nutrients

| PRJNA719662 | ENA

Transcription profiling of Arabidopsis roots after Iron deficiency

Project description:This SuperSeries is composed of the following subset Series:; GSE10496: Expression analysis of the effect of protoplasting and FACS sorting in roots exposed to iron deficiency (-Fe); GSE10497: Expression analysis of root developmental zones after iron deficiency (-Fe) treatment; GSE10501: Expression analysis of root cell-types after iron deficiency (-Fe) treatment; GSE10502: Time course expression analysis of the iron deficiency (-Fe) response in Arabidopsis roots Experiment Overall Design: Refer to individual Series

2008-06-11 | E-GEOD-10576 | biostudies-arrayexpress

Transcription profiling of Arabidopsis roots to investigate early phosphate-deficiency induced signal changes

Project description:A mutant previously isolated from a screen of EMS-mutagenized Arabidopsis lines, per1, showed normal root hair development under control conditions but displayed an inhibited root hair elongation phenotype upon Pi deficiency. Additionally, the per1 mutant exhibited a pleiotropic phenotype under control conditions, resembling Pi-deficient plants in several aspects. Under Pi deficiency, the accumulation of Pi and iron was increased in the mutant when compared to the wild-type. Inhibition of root hair elongation upon growth on low Pi media was reverted by treatment with the Pi analog phosphite, suggesting that the mutant phenotype is not the result of a defect in Pi sensing. Reciprocal grafting experiments revealed that the mutant rootstock is sufficient to cause the phenotype. Transcriptional profiling of per1 and wild-type plants subjected to short-term Pi starvation revealed genes that may be important for the signaling of Pi deficiency. We conclude that UBP14 function is crucial for adapting root development to the prevailing local availability of phosphate. Experiment Overall Design: Col-0 and per1 mutant plants were grown under control conditions or subjected to phosphate starvation for 10 h

2009-04-18 | E-GEOD-15649 | biostudies-arrayexpress

Early phosphate-deficiency induced signal changes in Arabidopsis roots

2009-04-14 | GSE15649 | GEO

A CYBDOM protein impacts iron homeostasis and primary root growth under phosphate deficiency in Arabidopsis

Project description:Phosphate is an essential macronutrient required for plant growth and development. However, it is present at suboptimal levels in many terrestrial ecosystems. To ameliorate this limitation, plants have evolved developmental and physiological mechanisms known as phosphate starvation responses (PSR). One of the main PSR in Arabidopsis thaliana is a deep restructuration of the root system architecture, which includes a reduction in primary root growth resulting in a shallower root system better adapted to explore the nutrient-rich topsoil. Intense research over the last years has shown that this developmental change is dependent on the accumulation and redistribution of iron (Fe) at the root tip, which in turn, participates in Fenton reactions and generates reactive oxygen species that affect meristem function and cell elongation. We have recently identified and characterized a cytochrome-containing protein in A. thaliana, named CRR, which is involved in the primary root growth response to phosphate starvation. Our results showed that CRR is an ascorbate-dependent ferric-reductase whose expression levels modulates iron distribution pattern in the root, affecting meristem function and cell elongation. Moreover, this activity also has shown to be critical for iron toxicity tolerance since CRR determines the transport rate of iron from root to shoot.

2023-10-01 | GSE215755 | GEO

A CYBDOM protein impacts iron homeostasis and primary root growth under phosphate deficiency in Arabidopsis

2023-10-25 | GSE235511 | GEO

Iron-deficiency-induced changes in wild type, ubc13A and cucumber CsUBC13 overexpressed Arabidopsis thaliana roots

Project description:CsUBC13 was identified via proteomics from iron starvation treated Cucumber root. ubc13A is an ABRC seed stock (CS51269). CS851269 was purchased from ABRC and confirmed as homozygous Atubc13A knock-out T-DNA mutant. We generated transgenic arabidopsis with ectopic expression of CsUBC13 gene under control of the cauliflower 35S promotor. Both genotypes and Col-0 were used to investigate the transcriptional response to Iron (Fe) deficiency. Wild type Col-0, ubc13A and transgenic overexpressor OE were grown under normal and iron-deficiency conditions. Roots were collected with 3 biological replicates.

2009-07-07 | E-GEOD-16964 | biostudies-arrayexpress

Blue light regulates phosphate deficiency-dependent primary root growth inhibition in Arabidopsis

Project description:Plants have evolved mechanisms to improve utilization efficiency or acquisition of inorganic phosphate (Pi) in response to Pi deficiency, such as altering root architecture, secreting acid phosphatases, and activating the expression of genes related to Pi uptake and recycling. Although many genes responsive to Pi starvation have been identified, transcription factors that affect tolerance to Pi deficiency have not been well characterized. We show here that the ectopic expression of B-BOX32 (BBX32) and the mutation of ELONGATED HYPOCOTYL 5 (HY5), whose transcriptional activity is negatively regulated by BBX32, resulted in the tolerance to Pi deficiency in Arabidopsis. The primary root lengths of 35S:BBX32 and hy5 plants were only slightly inhibited under Pi deficient condition and the fresh weights were significantly higher than those of wild type. The Pi deficiency-tolerant root phenotype of hy5 was similarly observed when grown on the medium without Pi. In addition, a double mutant, hy5 slr1, without lateral roots also showed a long primary root phenotype under phosphate deficiency, indicating that the root phenotype of hy5 does not result from increase of external Pi uptake. Moreover, we found that blue light may regulate Pi deficiency-dependent primary root growth inhibition through activating peroxidase gene expression, suggesting the Pi-deficiency tolerant root phenotype of hy5 may be due to blockage of blue-light responses. Altogether, this study points out light quality may play an important role in the regulation of Pi deficiency responses. It may contribute to regulate plant growth under Pi deficiency through a proper illumination.

2019-11-27 | GSE139100 | GEO

The Arabidopsis copper transport protein COPT2 and the responses under copper and iron deficiency.

Project description:Copper and iron are essential micronutrients for most living organisms because they participate as cofactors in biological processes including respiration, photosynthesis and oxidative stress protection. In many eukaryotic organisms, including yeast and mammals, copper and iron homeostases are highly interconnected; however such interdependence is not well established in higher plants. Here we propose that COPT2, a high-affinity copper transport protein, functions under copper and iron deficiencies in Arabidopsis thaliana. COPT2 is a plasma membrane protein that functions in copper acquisition and distribution. Characterization of the COPT2 expression pattern indicates a synergic response to copper and iron limitation in roots. We have characterized a knockout of COPT2, copt2-1, that leads to increased resistance to simultaneous copper and iron deficiencies, measured as reduced leaf chlorosis and improved maintenance of the photosynthetic apparatus. We propose that COPT2 expression could play a dual role under Fe deficiency. First, COPT2 participates in the attenuation of copper deficiency responses driven by iron limitation maybe aimed to minimize further iron consume. On the other hand, global expression analyses of copt2-1 mutants versus wild type Arabidopsis plants indicate that low phosphate responses are increased in copt2-1 plants. In this sense, COPT2 function under Fe deficiency counteracts low phosphate responses. These results open up new biotechnological approaches to fight iron deficiency in crops.

2013-06-05 | GSE42642 | GEO

Interdependent nutrient availability and steroid hormone signals facilitate root growth plasticity

Project description:Plants acquire essential elements from inherently heterogeneous soils, in which phosphate and iron availabilities vary. Consequently, plants developed adaptive strategies to cope with low iron and low phosphate levels, including alternation between root growth enhancement and attenuation. How this adaptive response is achieved remains unclear. Here, we found that low iron accelerates the root growth of Arabidopsis thaliana by activating brassinosteroid signaling, whereas low-phosphate-induced high iron accumulation inhibited it. Altered hormone signaling intensity also modulated iron accumulation in the root elongation and differentiation zones, constituting a feedback response between brassinosteroid and iron. Surprisingly, the early effect of low iron levels on root growth required the brassinosteroid receptor but the hormone ligand was negligible. The brassinosteroid receptor inhibitor BKI1, the transcription factors BES1/BZR1 and the ferroxidase LPR1, stood at the base of this feedback loop. Hence, shared brassinosteroid and iron regulatory components link nutrient status to root morphology, thereby driving the adaptive response.

2018-08-01 | GSE114250 | GEO

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