Trace metal metabolism in plants

Andresen, Elisa; Peiter, Edgar; Küpper, Hendrik

doi:10.1093/jxb/erx465

Cited by 337 publications

(253 citation statements)

References 576 publications

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“…Manganese (Mn) is an essential element in virtually all living organisms where it can fulfill two different functions: acting as an enzyme cofactor or as a metal with catalytic activity in biological clusters (Andresen et al, 2018). In humans, Mn functions as a cofactor for a variety of enzymes, including arginase, glutamine synthetase, pyruvate carboxylase, and Mn superoxide dismutase (MnSOD).…”

Section: Introductionmentioning

confidence: 99%

Manganese in Plants: From Acquisition to Subcellular Allocation

et al. 2020

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Manganese (Mn) is an important micronutrient for plant growth and development and sustains metabolic roles within different plant cell compartments. The metal is an essential cofactor for the oxygen-evolving complex (OEC) of the photosynthetic machinery, catalyzing the water-splitting reaction in photosystem II (PSII). Despite the importance of Mn for photosynthesis and other processes, the physiological relevance of Mn uptake and compartmentation in plants has been underrated. The subcellular Mn homeostasis to maintain compartmented Mn-dependent metabolic processes like glycosylation, ROS scavenging, and photosynthesis is mediated by a multitude of transport proteins from diverse gene families. However, Mn homeostasis may be disturbed under suboptimal or excessive Mn availability. Mn deficiency is a serious, widespread plant nutritional disorder in dry, well-aerated and calcareous soils, as well as in soils containing high amounts of organic matter, where bio-availability of Mn can decrease far below the level that is required for normal plant growth. By contrast, Mn toxicity occurs on poorly drained and acidic soils in which high amounts of Mn are rendered available. Consequently, plants have evolved mechanisms to tightly regulate Mn uptake, trafficking, and storage. This review provides a comprehensive overview, with a focus on recent advances, on the multiple functions of transporters involved in Mn homeostasis, as well as their regulatory mechanisms in the plant's response to different conditions of Mn availability.

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Section: Introductionmentioning

confidence: 99%

Manganese in Plants: From Acquisition to Subcellular Allocation

et al. 2020

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“…Zinc is an indispensable element for the development of higher plants and is classified as a soil microelement [13]. At the same time, it is toxic to plants when present in high concentration [14].…”

Section: Resultsmentioning

confidence: 99%

Effect of Zinc Ammonium Acetate on Characteristics of Timothy Canopy and Seed Yield

Radkowski

Radkowska

Lemek

et al. 2019

Ecological Chemistry and Engineering S

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The purpose of the experiment was to assess the effect of application of zinc ammonium acetate (ZAA) on yielding, morphological features and on selected vegetation indices of timothy cv. ‘Owacja’ cultivated for seeds. Zinc ammonium acetate that has a biostimulatory effect was used foliar in the carried out experiment. The experiment was conducted in the years 2015-2017 at the experimental station in Prusy near Krakow, a part of the Experimental Station of the Institute of Crop Production of the University of Agriculture in Krakow. The field experiment was set up in a randomized block design, in four replications, and the area of experimental plots was 10 m2. Degraded Chernozem formed from loess (classified to the first class quality soil) was present on the experimental area. The experiment consisted in applying ZAA as spray at three doses: 0.214, 0.267 and 0.400 kg(ZnNH4(CH3CO2)3)/ha. Based on the obtained preliminary results, it was found that application of foliar activator in a higher dose (0.400 kg/ha) caused a significant (p ≤ 0.05) increase in seed yield, 1000-seed weight and in germination capacity in relation to the control. Improvement in morphological properties was also observed. Leaf greenness index (SPAD) was also determined. Its highest value was found in plants from the treatment where the highest dose of the zinc ammonium acetate was applied. Seeds obtained from plants treated with ZAA were riper (ripeness was measured with 1000-seed weight) and had higher germination capacity in relation to control treatments.

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“…intercellular transport to specialized cells [7,[9][10][11], or by excretion [12,13]. Homeostasis depends on metal ion transport from the apoplast to the symplasm, mediated by membrane proteins with transport functions, known as transporters, as the ions cannot move freely across the lipophilic cellular membranes [8,[13][14][15].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

A new conceptual framework for plant responses to soil metals based on metal transporter kinetic parameters

Guterres

Rossato

Doley

et al. 2019

Journal of Hazardous Materials

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Based on a review of the literature, we have developed a functional conceptual framework of plant metal uptake in relation to plant available metal concentration in the soil. This framework applies to all plant parts and plant available metal levels in soils, and was validated using independent datasets from field surveys and the literature. This is the first framework based on metal transporter kinetic parameters and combining Michaelis-Menten (hyperbolic) kinetics facilitated by the High Affinity Transport System (HATS) for soil concentrations below the transition concentration between transport systems, and linear metal uptake facilitated by the Low Affinity Transport System (LATS) for higher soil available metal concentrations. We propose a new terminology for metal tolerant plants, i.e. metal tolerators, based on this framework. Depending on the plant available metal levels in the soil, tolerator responses to metals can be described best by either Vmax and Km for soil concentrations below the transition concentration between metal transport systems (HATS), or by the slope for greater soil concentrations (LATS). This conceptual framework may be a useful tool for selecting suitable metal tolerators for specific phytoremediation purposes, and may be also applied to non-metal elements or ions.

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Trace metal metabolism in plants

Cited by 337 publications

References 576 publications

Manganese in Plants: From Acquisition to Subcellular Allocation

Manganese in Plants: From Acquisition to Subcellular Allocation

Effect of Zinc Ammonium Acetate on Characteristics of Timothy Canopy and Seed Yield

A new conceptual framework for plant responses to soil metals based on metal transporter kinetic parameters

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