Copper: uptake, toxicity and tolerance in plants and management of Cu-contaminated soil

Mir, Anayat Rasool; Pichtel, John; Hayat, Shamsul

doi:10.1007/s10534-021-00306-z

Cited by 206 publications

(74 citation statements)

References 160 publications

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“…While elements are transported to their physiological destination they are exposed to a variety of non-transport related reactions. For instance, B readily forms ester bonds in many metabolites of primary and secondary metabolism while Cu can be retained in prosthetic bonds or as a cofactor in enzymes ( Brdar-Jokanović, 2020 ; Li et al, 2020 ; Mir et al, 2021 ). Sorption, chelation, and complexation of elements to and with various organic and inorganic molecules is ubiquitous in plants.…”

Section: Introductionmentioning

confidence: 99%

Stable Isotope Fractionation of Metals and Metalloids in Plants: A Review

et al. 2022

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This work critically reviews stable isotope fractionation of essential (B, Mg, K, Ca, Fe, Ni, Cu, Zn, Mo), beneficial (Si), and non-essential (Cd, Tl) metals and metalloids in plants. The review (i) provides basic principles and methodologies for non-traditional isotope analyses, (ii) compiles isotope fractionation for uptake and translocation for each element and connects them to physiological processes, and (iii) interlinks knowledge from different elements to identify common and contrasting drivers of isotope fractionation. Different biological and physico-chemical processes drive isotope fractionation in plants. During uptake, Ca and Mg fractionate through root apoplast adsorption, Si through diffusion during membrane passage, Fe and Cu through reduction prior to membrane transport in strategy I plants, and Zn, Cu, and Cd through membrane transport. During translocation and utilization, isotopes fractionate through precipitation into insoluble forms, such as phytoliths (Si) or oxalate (Ca), structural binding to cell walls (Ca), and membrane transport and binding to soluble organic ligands (Zn, Cd). These processes can lead to similar (Cu, Fe) and opposing (Ca vs. Mg, Zn vs. Cd) isotope fractionation patterns of chemically similar elements in plants. Isotope fractionation in plants is influenced by biotic factors, such as phenological stages and plant genetics, as well as abiotic factors. Different nutrient supply induced shifts in isotope fractionation patterns for Mg, Cu, and Zn, suggesting that isotope process tracing can be used as a tool to detect and quantify different uptake pathways in response to abiotic stresses. However, the interpretation of isotope fractionation in plants is challenging because many isotope fractionation factors associated with specific processes are unknown and experiments are often exploratory. To overcome these limitations, fundamental geochemical research should expand the database of isotope fractionation factors and disentangle kinetic and equilibrium fractionation. In addition, plant growth studies should further shift toward hypothesis-driven experiments, for example, by integrating contrasting nutrient supplies, using established model plants, genetic approaches, and by combining isotope analyses with complementary speciation techniques. To fully exploit the potential of isotope process tracing in plants, the interdisciplinary expertise of plant and isotope geochemical scientists is required.

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Section: Introductionmentioning

confidence: 99%

Stable Isotope Fractionation of Metals and Metalloids in Plants: A Review

et al. 2022

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“…Excess of metals, such as Cu and Pb exhibits toxic effects and leads to severe disturbances in plants homeostasis (reviewed in Prasad, 2018, Zulfiqar et al, 2019;Mir et al, 2021). To activate defense mechanisms and survive unfavorable conditions, plants need to transduce stress signals and modulate gene expression.…”

Section: Discussionmentioning

confidence: 99%

“…Through the action of these proteins, Cu is engaged in the processes of photosynthesis, respiration, cell wall metabolism, stress signaling, and defense mechanisms (MacPherson and Murphy, 2007;Pérez-Henarejos et al, 2015, Mir et al, 2021. Thus, Cu deficiency alerts normal plant functioning.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, excess of this metal also negatively affects plants. High Cu concentrations lead to hampered germination, reduced growth, alerted plant morphology and mineral homeostasis, chlorosis, decreased photosynthesis efficiency, and oxidative stress reflected by accumulation of reactive oxygen species (ROS) and intensified lipid peroxidation (reviewed in Mir et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Oxidative RNA Modifications as an Early Response of Soybean (Glycine max L.) Exposed to Copper and Lead

et al. 2022

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Plant exposure to metals is associated with the accumulation of reactive oxygen species, which mediate the oxidation of various molecules including lipids, proteins, and nucleic acids. The aim of the present study is the evaluation of the impact of short-term Cu and Pb treatment on oxidative events in the roots of soybean seedlings, with special emphasis on RNA oxidation. The results show that an increase in total RNA oxidative modification, 8-hydroxyguanosine (8-OHG), constitutes a very early response to both applied metals, observed already within the first hour of treatment. Exposure to Cu and Pb resulted also in the increase in superoxide anion and hydrogen peroxide levels and intensified lipid peroxidation. However, these responses were most prominent after longer treatment times. On the other hand, no changes were observed in the level of protein carbonylation. It can be concluded that 8-OHG enrichment in total RNA constitutes one of the earliest reactions to metals, which precedes the symptoms of oxidative stress.

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“…Indeed, Cu acts as a cofactor in various enzymes and performs essential roles in plant growth and development. Excess Cu, however, imparts negative effects on plant growth and productivity (Mir et al, 2021). Following Cu uptake by roots, Cu may be sequestered into the vacuoles or translocated to the shoots and then distributed/redistributed to different organs and tissues (Zhang et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

OsAT1, an anion transporter, negatively regulates grain size and yield in rice

Liu

Wang

Liu

et al. 2022

Physiologia Plantarum

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Improving the grain yield of rice is a central goal of basic and applied scientific research. Here, we identified an anion transporter, OsAT1, localized in the endoplasmic reticulum and Golgi. OsAT1 is highly expressed in flag, stem, and sheath as monitored using qRT‐PCR and pOsAT1::GUS. Thousand‐grain weight, grain weight per plant, and content of starch were significantly increased in OsAT1 knock‐down mutants (OsAT1‐Ri) but significantly decreased in OsAT1 overexpressed lines (OsAT1‐OE). In addition, the grain weight per plant increased by 6.17% to 6.78% in OsAT1‐RNAi lines, whereas it decreased by 45.93% to 46.76% in OsAT1‐OE lines, compared to wild‐type. Moreover, the copper content was noticeably reduced in flag leaf of OsAT1‐Ri lines and increased in OsAT1‐OE lines. RNA‐sequencing analysis of OsAT1‐OE lines revealed that the genes related to starch biosynthesis and metabolism pathway were enriched in the down‐regulated category. Thus, our results suggest that knock‐down of OsAT1 in rice possibly reduces copper accumulation and improves the accumulation of storage starch, hence, increasing the grain size and weight. OsAT1 may be a useful gene to consider for cereal breeding programs.

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Copper: uptake, toxicity and tolerance in plants and management of Cu-contaminated soil

Cited by 206 publications

References 160 publications

Stable Isotope Fractionation of Metals and Metalloids in Plants: A Review

Stable Isotope Fractionation of Metals and Metalloids in Plants: A Review

Oxidative RNA Modifications as an Early Response of Soybean (Glycine max L.) Exposed to Copper and Lead

OsAT1, an anion transporter, negatively regulates grain size and yield in rice

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