Liming as a means of reducing copper toxicity in black oats

Comin, Jucinei José; Ambrosini, Vítor Gabriel; Rosa, Daniel José; Basso, Alex; Loss, Arcângelo; Melo, G. W. B. de; Lovato, Paulo Emílio; Lourenzi, Cledimar Rogério; Ricachenevsky, Felipe Klein; Brunetto, Gustavo

doi:10.1590/0103-8478cr20170278

Cited by 11 publications

(7 citation statements)

References 19 publications

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“…In all investigated plants metals migration from roots to shoots was to a much lesser extent affected by the pH modifications with copper being the most prone. Zinc and manganese are usually transported by the symplastic pathways, while copper partially follows the apoplastic avenues [ 44 ]. We speculate that the latter mechanism is more affected by soil pH changes, which propagate within plant tissues through free spaces of the apoplast.…”

Section: Discussionmentioning

confidence: 99%

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The Impact of Soil pH on Heavy Metals Uptake and Photosynthesis Efficiency in Melissa officinalis, Taraxacum officinalis, Ocimum basilicum

Adamczyk-Szabela

Wolf

2022

Molecules

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Herbs used in medicine should be grown under controlled and standardized conditions. Agricultural practices often induce changes to soil pH, which may affect migration of heavy metals in the environment, their accumulation in plant tissues and the concentration of medicinal ingredients. The aim of this work was to assess the influence of various soil pH on the biological parameters and uptake of manganese, copper and zinc by basil, dandelion and lemon balm. The soil analysis covered pH, organic matter content, bioavailable and total forms of investigated metals in soil. In plants cultivated in soil at pH covering the range 4.7–8.5 the concentrations of Mn, Cu and Zn were analyzed. Their mobility and availability were assessed by bioaccumulation factors, translocation factors and transfer coefficients. The seed germination and subsequent herbs growth were strongly dependent on soil pH for all investigated plant species. Photosynthetic efficiency at different pHs was positively correlated with uptake of Cu and Mn while Zn behaved in a more random way.

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Section: Discussionmentioning

confidence: 99%

“…In a charged form those entities bind copper cations and decrease their transport to the upper parts of the plant. On the other hand, accumulation of copper chelates in the symplast may be facilitated by their substantial affinity to amino acids, peptides and proteins [ 44 , 45 ].…”

Section: Discussionmentioning

confidence: 99%

The Impact of Soil pH on Heavy Metals Uptake and Photosynthesis Efficiency in Melissa officinalis, Taraxacum officinalis, Ocimum basilicum

Adamczyk-Szabela

Wolf

2022

Molecules

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“…The increased Cu retention in the root system of both plant species evidenced high Cu a nity for carboxylic groups found in cell wall. Some Cu may have been retained in the root apoplast, and it reduced Cu concentration in the symplast (Ambrosini et al, 2018(Ambrosini et al, , 2015Comin et al, 2018). The increased Cu concentration in plant roots also results from intracellular production of organic acids such as citrate (Keller et al, 2015;Murphy et al, 1999), as well as of phytochelatins acting in cytosol.…”

Section: Discussionmentioning

confidence: 99%

Physiological responses of beet and cabbage plants exposed to copper and their potential insertion in human food chain

Schmitt

Andriolo

Silva

et al. 2022

Environ Sci Pollut Res

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Copper (Cu) can be toxic to vegetables when it is absorbed and accumulated at large concentrations, a fact that increases the risk of excessive addition of this metal to the human food chain. The aims of the current study are (1) to determine the Cu concentrations that have critical toxic effects on beet and cabbage plants, and the potential of these plants to enter the human food chain; as well as (2) to assess the physiological and biochemical responses of representatives of these vegetables grown in nutrient solution presenting increasing Cu concentrations. Beet and cabbage plants were grown for 75 days in pots lled with sand added with nutrient solution presenting six Cu concentrations: 0.00, 0.52, 1.02, 1.52, 2.02 and 2.52 mg Cu L -1 . Dry matter yield and Cu accumulation in different plant organs were evaluated. Photosynthetic pigment contents, lipid peroxidation levels (TBARs), superoxide dismutase (SOD, EC 1.15.1.1) and peroxidase (POD, EC 1.11.1.7) activity, and hydrogen peroxide (H 2 O 2 ) concentrations in leaves were evaluated. Critical Cu concentrations that led to toxicity in plant organs such as beetroot and cabbage head, which are often found in human diets, corresponded to 1.43 mg Cu L -1 and 1.59 mg Cu L -1 , respectively. High Cu concentrations in the nutrient solution have increased Cu concentrations and accumulation in plant tissues. This outcome justi ed the increased POD and SOD enzyme activity in the leaves of beet and cabbage plants, respectively, as well as was the cause of reduced plant growth in both crops. Cabbage plants presented higher tolerance to increased Cu levels in the growing environment than beet plants. However, it is necessary being careful at the time to consume both vegetables, when they are grown in Cu-enriched environments.

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“…Under toxicity situations, copper accumulation in the root system is the most common behavior pattern observed in several species of different functional groups and botanical families (Marques et al 2018;Torasa et al 2019;Tiecher et al 2017;Li et al 2019). This behavior is one of the tolerance mechanisms in higher plants, acting as a strategy to preserve normal metabolic activities and mitigate the potential harmful effects to the photosynthetic mechanism in leaf tissues (Comin et al 2018). Some strategies, such as chelation, sequestration and storage of copper ions in the vacuole, are used by higher plants to retain Cu in roots (Klaumann et al 2011;Kumar et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Physiological and biochemical changes in tree seedlings in an urban forest soil contaminated with copper

Siqueira

Kanashiro

Domingos

et al. 2021

Preprint

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Context Soil pollution by heavy metals is a worldwide environmental concern. Owing to their proximity to anthropogenic emission sources, urban forest fragments are highly affected by the excessive input of heavy metals into the soil.Objectives This study aimed to assess the physiological and biochemical responses of two native Brazilian Atlantic Forest Schinus terebinthifolia Raddi (pioneer species) and Eugenia uniflora L. (non-pioneer species), when cultivated in soils contaminated with Cu. Methods Plants were cultivated in soils of an urban forest fragment contaminated with 0 (control), 60, 120, 180 or 240 mg Cu kg-1 soil. Growth variables, Cu content in plant tissues, translocation index, bioaccumulation factor, pigment contents, leaf gas exchange and chlorophyll fluorescence were all measured to assess physiological alterations resulting from copper stress, while the enzymatic (superoxide dismutase) and nonenzymatic (ascorbic acid and glutathione) antioxidants were quantified to assess the biochemical responses of the species. Results Both species presented high uptake and accumulation of Cu in roots with low translocation rates to shoots; however, S. terebinthifolia showed higher Cu restriction in roots than E. uniflora. S. terebinthifolia and E. uniflora showed distinct responses in growth and leaf gas exchange. The species showed neither difference in enzymatic contents nor oxidative reduction. Conclusion The restriction of copper in roots appears to be the principal protective mechanism against copper phytotoxicity, preventing negative effects on the physiological and biochemical status of the species. S. terebinthifolia shows potential as a Cu phytostabilizer, while the E. uniflora has potential as a Cu phytoextractor.

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Liming as a means of reducing copper toxicity in black oats

Cited by 11 publications

References 19 publications

The Impact of Soil pH on Heavy Metals Uptake and Photosynthesis Efficiency in Melissa officinalis, Taraxacum officinalis, Ocimum basilicum

The Impact of Soil pH on Heavy Metals Uptake and Photosynthesis Efficiency in Melissa officinalis, Taraxacum officinalis, Ocimum basilicum

Physiological responses of beet and cabbage plants exposed to copper and their potential insertion in human food chain

Physiological and biochemical changes in tree seedlings in an urban forest soil contaminated with copper

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