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Transcriptional characterization of tomato roots response to iron deficiency

ABSTRACT: Iron (Fe) deficiency is a yield-limiting factor for a variety of field crops across the world and generally results from the interaction of limited soil Fe bioavailability and susceptible genotype cultivation. Tomato, a Strategy I, model plant for Fe deficiency, is an important economical crop. Tomato responses in order to improve Fe uptake are based on acidification of rhizosphere, reduction of Fe3+ to Fe2+ and transport of Fe2+ into the cells.

ORGANISM(S): Solanum lycopersicum

PROVIDER: GSE31112 | GEO | 2012/03/22

SECONDARY ACCESSION(S): PRJNA144681

REPOSITORIES: GEO

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Transcriptional characterization of tomato roots response to iron deficiency

Project description:Iron (Fe) deficiency is a yield-limiting factor for a variety of field crops across the world and generally results from the interaction of limited soil Fe bioavailability and susceptible genotype cultivation. Tomato, a Strategy I, model plant for Fe deficiency, is an important economical crop. Tomato responses in order to improve Fe uptake are based on acidification of rhizosphere, reduction of Fe3+ to Fe2+ and transport of Fe2+ into the cells. Transcriptional profile obtained by roots (27-d) of 21-d-old tomato plants starved of iron for an additional week was compared with the transcriptional profile obtained for roots (27-d) of 21-d-old tomato plants grown for an additional week at 100 M-NM-<M Fe. Tomato plants were hydroponically grown in both cases. Three different biological replicates were used for each sample repeating the experiment three times. All samples were obtained pooling roots of six plants (27-d-old).

2012-03-22 | E-GEOD-31112 | biostudies-arrayexpress

Root transcriptional profile of tomato Fe-deficient plants in response to supply with natural chelating agents.

2016-01-11 | GSE69419 | GEO

Transcriptome analysis reveals new insight into iron homeostasis in Populus tomentosa

Project description:Iron (Fe) is an essential micronutrient for the survival and proliferation of plants. Plants have evolved complex mechanisms to maintain Fe homeostasis in response of Fe deficiency conditions. To explore the mechanisms of Populus tomentosa response to Fe deficiency, we evaluated the physiological, biochemical and transcriptome differences of P. tomentosa between Fe-sufficient and Fe-deficient conditions. The results showed that, under Fe-free conditions, the chlorophyll synthesis and photosynthesis pathways in shoots were extremely depressed. The inhibition of these pathways caused chlorosis and reduced shoot growth. Meanwhile, although both two photosynthetic systems (PSI and PSII) were inhibited under Fe limited conditions, PSI is affected more serious and earlier than PSII. In order to maintain Fe homeostasis, several genes involved in Fe regulation network were differentially expressed. At the late period of Fe deficiency response, some genes (BTS, bHLH38/39 and PYE) in PYE regulatory network were up-regulated in roots, while some root-specific ethylene-dependent FIT regulatory genes (EIN3, ERF and FIT) were down-regulated. Moreover, FRO2 was induced in P. tomentosa roots to reduce more Fe3+, which is similar with other strategy I plants. It is interest that we found another Fe2+ transporter gene (NRAMP1) was induced, instead of the well-known Fe2+ transporter gene (IRT1) for strategy I plants, to promote Fe2+ absorption at the Fe deficiency late stage.

2020-01-01 | GSE116838 | GEO

Root transcriptional profile of tomato Fe-deficient plants in response to supply with natural chelating agents.

Project description:Tomato, a Strategy I model plant for Fe deficiency, is an important economical crop. The transcriptional responses induced by Fe deficiency in tomato roots were previously described (Zamboni et al., 2012). The changes in trascriptome caused by the supply of Fe to plants starved fro 1 week were described in relation to the different nature of chelating agents (Fe-WEHS, Fe-CITRATE and Fe-PS). Transcriptional profile obtained by roots (27-d) of 21-d-old tomato plants starved of iron (0 Î¼M Fe-EDTA) for 1 week and supplied for 1 h with 1 Î¼M of Fe as Fe-WEHS (supply_Fe_WEHS), Fe citrate (supply_Fe_CITRATE) and Fe-PS (supply_Fe_PS). Tomato plants were hydroponically grown in all three case of Fe supply. Three different biological replicates were used for each sample repeating the experiment three times. All samples were obtained pooling roots of six plants (27-d-old).

2016-01-11 | E-GEOD-69419 | biostudies-arrayexpress

Transcriptomic changes in maize roots in response to Fe deficiency

Project description:Iron deficiency is a yield-limiting factor and a worldwide problem for crop production in many agricultural regions, particularly in aerobic and calcareous soils. Graminaceous species, like maize, improve Fe acquisition through the release of phytosiderophores (PS) into the rhizosphere and the following uptake of Fe(III)-PS complexes through specific transporters. Transcriptional profile obtained by roots 12-d-old maize plants under Fe starvation for 1 week (Fe-deficient; 19-d-old plants) were compared with the transcriptional profile obtained by roots of 12-d-old maize plants grown in a nutrient solution containing 100 μM Fe-EDTA for 1 week (Fe-sufficient; 19-d-old plants).

2017-06-12 | GSE76829 | GEO

Iron-deficiency-induced changes in wild type and IRP1overexpressed transgenic Arabidopsis plants

Project description:a novel orphan peptide, IRON-REGULATED PROTEIN1 (IRP1) that is rapidly induced by Fe deficiency and improves growth on Fe-deplete media. In Arabidopsis, ectopic expression of IRP1 affected the activity of several genes involved in Fe acquisition and homeostasis, causing a dramatic increase of Fe in leaves and enhanced seed Fe loading. Heterologous expression of IRP1 in tomato plants resulted in increased Fe levels in fruits. Integration of AtIRP1 into the genome of crop plants may represent a novel strategy for Fe biofortification.

2014-10-10 | GSE51692 | GEO

Project description:Phytoplasma infection and Fe deficiency in tomato.

| PRJNA548138 | ENA

Genome wide expression responses of Fusarium oxysporum wt and M-NM-^ThapX mutant to iron depleted and iron replete conditions.

Project description:Soilborne fungal pathogens cause devastating yield losses, are highly persistent and difficult to control. To culminate infection, these organisms must cope with limited availability of iron. Here we show that the bZIP protein HapX functions as a key regulator of iron homeostasis and virulence in the vascular wilt fungus Fusarium oxysporum. Deletion of hapX does not affect iron uptake, but causes derepression of genes involved in iron-consuming pathways, leading to impaired growth under iron-depleted conditions. F. oxysporum strains lacking HapX are reduced in their capacity to invade and kill tomato plants and immunodepressed mice. The virulence defect of M-NM-^ThapX on tomato plants is exacerbated by coinoculation of roots with a biocontrol strain of Pseudomonas putida, but not with a siderophore-deficient mutant, indicating that HapX contributes to iron competition of F. oxysporum in the tomato rhizosphere. These results establish a conserved role for HapX-mediated iron homeostasis in fungal infection of plants and mammals. Iron dependent gene expression in Fusarium oxysporum wt and M-NM-^ThapX mutant was measured 1 hour after shifting the mycelia to minimal medium with or without 50 M-NM-<M Fe2(SO4)3. Three independent experiments were performed.

2012-07-13 | E-GEOD-39325 | biostudies-arrayexpress

Niche differentiation of arsenic-transforming microbial groups in rice rhizosphere compartments as impacted by water management and soil-As concentrations

Project description:Arsenic (As) bioavailability in the rice rhizosphere is influenced by many microbial interactions, particularly by metal-transforming functional groups at the root-soil interface. This study was conducted to examine As-transforming microbes and As-speciation in the rice rhizosphere compartments, in response to two different water management practices (continuous and intermittently flooded), established on fields with high to low soil-As concentration. Microbial functional gene composition in the rhizosphere and root-plaque compartments were characterized using the GeoChip 4.0 microarray. Arsenic speciation and concentrations were analyzed in the rhizosphere soil, root-plaque, porewater and grain samples. Results indicated that intermittent flooding significantly altered As-speciation in the rhizosphere, and reduced methyl-As and AsIII concentrations in the pore water, root-plaque and rice grain. Ordination and taxonomic analysis of detected gene-probes indicated that root-plaque and rhizosphere assembled significantly different metal-transforming functional groups. Taxonomic non-redundancy was evident, suggesting that As-reduction, -oxidation and -methylation processes were performed by different microbial groups. As-transformation was coupled to different biogeochemical cycling processes establishing functional non-redundancy of rice-rhizosphere microbiome in response to both rhizosphere compartmentalization and experimental treatments. This study confirmed diverse As-biotransformation at root-soil interface and provided novel insights on their responses to water management, which can be applied for mitigating As-bioavailability and accumulation in rice grains.

2021-07-12 | GSE179671 | GEO

Iron-deficiency-induced changes in wild type and IRP1overexpressed transgenic Arabidopsis plants

2014-10-10 | E-GEOD-51692 | biostudies-arrayexpress

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