— Plants undergo morphological changes in root architecture such as inhibition in root growth along with an increase in the number of lateral roots and root hairs in response to Fe deficiency in order to increase the root surface area for enhanced Fe uptake (Hindt and Guerinot, 2012, Schmidt, 1999).Iron is present in the form of Fe 3+ in the …
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— Transcriptional regulators of iron uptake in plant pathogens. Although iron is necessary for pathogens to infect their host plants and proliferate within them, excessive …
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— Iron uptake strategies in plants (a) Strategy I is a reduction based strategy found in most plants except grasses, this includes acidification of the rhizosphere by the plasma membrane H +-ATPase (P-ATPase) which increases the solubility of Fe 3+. The soluble Fe 3+ is then chelated by the phenolics and exported by the ABCG37 transporter.
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— Non-gramineous plants utilize reduction-based strategy/strategy I to uptake iron from the soil. Reduction strategy has been exemplified in several non-gramineous plants such as Solanum lycopersicum and Arabidopsis thaliana, but it is well illustrated in Arabidopsis.During iron deficient condition, the plasma membrane localized H + …
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Higher plants have developed two distinct strategies to acquire iron, which is only slightly soluble, from the rhizosphere: the reduction strategy of nongraminaceous plants and the chelation strategy of graminaceous plants. ... Iron uptake, translocation, and regulation in higher plants Annu Rev Plant Biol. 2012:63:131-52. doi: 10.1146/annurev ...
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— The iron uptake strategies of plant pathogens have classically been divided into low-affinity and high-affinity uptake pathways (Haas 2014). Low-affinity uptake pathways encompass iron-containing protein uptake pathways and ferrous iron absorption pathways, mainly employed when iron is sufficient.
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— Fe acquisition systems. Plants use two different strategies for Fe uptake to adapt to Fe-deficient environments, "strategy I" and "strategy II" (Römheld and Marschner, 1986).Strategy I is a reduction-based mechanism that involves acidification of the rhizosphere by root-released protons, reduction of Fe 3+ to Fe 2+ by a membrane …
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— In this regard, plants have evolved a series of mechanisms for efficient iron uptake, allowing plants to better adapt to iron deficient conditions. These mechanisms include iron acquisition from soil, iron …
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Plants have two major problems with iron as a free ion: its insolubility and its toxicity. ... Uptake and trafficking of iron throughout the plant is therefore a highly integrated process of membrane transport and reduction, trafficking between chelator species, whole-plant allocation and genetic regulation. The improvement of crop plants with ...
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— Abstract Mobilization of iron (Fe) chelated by humic acids (HA) of low (HA10,000) and high molecular weight (HA100,000) fractions and its uptake by plants were investigated in growth experiments with sunflower seedlings. The iron chelates (labeled with 59Fe) contained in dialysis bags (mw. cutoff=3500) were placed in minus iron Hoagland …
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Carnivorous plants use animals as fertiliser substitutes which allow them to survive on nutrient deficient soils. Most research concentrated on the uptake of the prey's nitrogen and phosphorus; only little is known on the utilisation of other elements. ... We demonstrated the uptake of trace elements like iron and manganese. In addition, we ...
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— On the other hand, graminaceous plants, such as rice, use the so-called strategy II to acquire iron, which relies on the uptake of Fe 3+ chelated by phytosiderophores that are secreted by the plant into the rhizosphere. However, apart these main strategies, accessory mechanisms contribute to robust iron uptake in both …
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Thus, elucidating the mechanisms of Fe uptake and transport is essential for the breeding of crops that are more nutrient rich and more tolerant of Fe-limited soils. This review covers …
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— A plant peptide binds to haem, thereby reducing the availability of haem and inducing an iron-starvation response in rhizobia that results in iron import for nitrogenase activity.
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— Strategy II plants uptake iron in iron deficiency through the excretion of phytosiderophores (PSs), which are low molecular weight Fe chelating substances such as mugineic acids (MA) and nicotianamine (NA) having high affinity for ferric and produce an iron–phytosiderophore soluble complex. The iron–phytosiderophore complex is then ...
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— This review discusses how plants integrate different components into the Fe deficiency response, with a focus on research in Arabidopsis and rice, and highlights the most recently characterized …
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— Iron is a metal micronutrient that is essential for plant growth and development. Graminaceous and nongraminaceous plants have evolved different mechanisms to mediate Fe uptake. Generally, strategy I is used by nongraminaceous plants like Arabidopsis, while graminaceous plants, such as rice, barley, …
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— This article reviews the present knowledge on iron (Fe) uptake, transport, subcellular translocation, and its regulation at the molecular level mainly on Oryza sativa and Arabidopsis thaliana, which …
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VonWiren N, Mori S, Marschner H and Römheld V 1994 Iron inefficiency in maize mutant ysl (Zea mays L. cv Yellow-Stripe) is caused by a defect in uptake of iron phytosiderophores. Plant Physiol. 106, 71–77. PubMed Google Scholar Welch R M 1995 Micronutrient nutrition of plants. Crit. Rev. Plant Sci. 14, 49–82.
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— Iron uptake strategies in plants and the Fe 3+ –siderophore complex uptake system in phytopathogens. (A) Plant iron uptake strategies. In strategy I, the H +-ATPase AHA2 located on the plasma membrane (PM) pumps protons into the rhizosphere, which increases the solubility of Fe 3+.FRO2 reduces Fe 3+ to Fe 2+, which is then …
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— The latter role of coumarins again depends on the plant iron uptake machinery. Citation 42 In addition to IRT1, other metal transporters likely contribute to iron acquisition from the soil. The Natural Resistance-Associated Macrophage Protein 1 (NRAMP1) metal transporter is upregulated under Fe deficiency and behaves as a low …
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— Iron (Fe) is an essential micronutrient for plant growth and development. Fe availability affects crops' productivity and the quality of their derived products and thus human nutrition. Fe is poorly available for plant use since it is mostly present in soils in the form of insoluble oxides/hydroxides, especially at neutral to alkaline pH. How plants …
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— This review discusses how plants integrate different components into the Fe deficiency response, with a focus on research in Arabidopsis and rice, and highlights the …
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— 2. Iron uptake. Iron uptake in plants has classically been divided into Strategy I and Strategy II, also known as reducing and chelating strategies, respectively.7 The main difference between both strategies is the oxidation state of iron when taken up by the plant: ferrous Fe 2+ for Strategy I and ferric Fe 3+ for Strategy II. Iron in the rhizosphere is …
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— Aeration and plant can jointly promote P removal by converting Fe 2+ into Fe 3+.. Canna generalis absorbed more P in the plant tissue than Zizania caduciflora.. Zizania caduciflora adsorbed more P on the root surface than Canna generalis.. Canna generalis dissolves P for plant uptake by releasing more organic acids.. Zizania caduciflora …
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— 5.2.1 Transport of Iron through Plant Roots. After uptake via roots, Fe 2+ is transported across the root epidermal layer by particular carriers or channels known as ZIP family transporters or carriers (ZRT IRT-like Protein) (Kim and Guerinot 2007).Various types of endodermal as well as epidermal efflux carriers or transporters chiefly transport Fe …
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— However, it is unclear how N affects Cd uptake by plants. Wild-type and iron uptake-inefficient tomato (Solanum lycopersicum) mutant (T3238fer) plants were grown in pH-buffered hydroponic culture to investigate the direct effect of N-form on Cd uptake. Wild-type plants fed NO 3 − accumulated more Cd than plants fed NH 4 +.
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— This work reveals that the transcription factors SOD7 and DPA4 interact with the transcriptional coactivator GIF1 to coordinate plant organ size control and iron uptake by competing with growth ...
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Plants are the principal source of dietary iron (Fe) for most of Earth's population and Fe deficiency can lead to major health problems. Developing strategies to improve plant Fe content is a challenge because Fe is essential and toxic and therefore regulating Fe uptake is crucial for plant survival.
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— 1. Introduction. Genetic haemochromatosis is characterized by an increased intestinal dietary iron uptake, of both nonheme and heme iron [1–3], which in the long term may lead to the gradual accumulation of excess iron in the body and clinical symptoms of iron overload.The various forms of genetic haemochromatosis are caused by mutations …
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— This review gives an overview of Need for biofortication, Plant growth promoting rhizobacte-ria, Plant growth promoting consortia, importance of iron for human health, uptake of iron in plants ...
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— Main iron-acquisition strategies of land plants: Arabidopsis thaliana and Oryza Sativa as model organisms Although iron is generally abundant in aerobic soils, it tends to form oxyhydrates of ferric iron (Fe 3+) of low solubility at neutral or alkaline pH. 9 Plants evolved two major strategies to increase the solubility of immobile iron pools. All …
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— The iron content of foods does not indicate its bioavailability because iron absorption depends on some factors, mainly the form of iron. Because plants mainly contain nonheme iron, even if its iron content is high, absorption of iron is low due to plant-based molecule–iron interactions. 40 Red meat is the most significant source of iron ...
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The NBD-DFO is fluorescent only when unferrated and can thus be used as a probe to follow iron removal from the siderophore. Monitoring of the fluorescence increase in a nutrient solution containing Fe(3+)-NBD-DFO showed that iron uptake by plants occurs at the cell membrane. The rate of iron uptake was significantly lower in both plant species ...
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— To adapt to Fe-deficient environments, plants evolved two different iron uptake mechanisms, known as reducing (Strategy I) and chelating strategies (Strategy …
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Recent research has uncovered central transcription factors, cis-acting elements, and molecular mechanisms regulating these genes. Manipulation of these molecular …
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