The response of a model C3/CAM intermediate semi-halophyte Mesembryanthemum crystallinum L. to elevated cadmium concentrations

Nosek, Michał; Kaczmarczyk, Adriana; Śliwa, Marta; Jędrzejczyk, Roman J.; Kornaś, Andrzej; Supel, Paulina; Kaszycki, Paweł; Miszalski, Zbigniew

doi:10.1016/j.jplph.2019.153005

Cited by 15 publications

(31 citation statements)

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“…Mesembryanthemum crystallinum tolerance to the presence of the two tested heavy metals was first evaluated based on the morphological visible symptoms. For the case of Cd, the results were consistent with our earlier observations on high plant resistance to this metal [ 48 , 49 ]. Accordingly, no visible toxicity effects were developed up to the administered dose of 80 μmol Cd 2+ per pot, that is 82 mg kg −1 soil d.w. (plants indistinguishable from the control ones, Figure 1 a).…”

Section: Resultssupporting

confidence: 92%

“…For cadmium treatment, our observations support the recently published data proving high tolerance towards this metal [ 48 , 49 ], for plants performing both the C 3 and CAM photosynthesis. It should be noted, however, that possibly a significant fraction of Cd supplemented to the soil substrate was biologically unavailable for the plant since it is well known that Cd can get involved in various interactions with the soil leading to its gradual fixation and immobilization [ 52 ].…”

Section: Discussionsupporting

confidence: 90%

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The Common Ice Plant (Mesembryanthemum crystallinum L.)–Phytoremediation Potential for Cadmium and Chromate-Contaminated Soils

Śliwa-Cebula

Kaszycki

Kaczmarczyk

et al. 2020

Plants

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The common ice plant (Mesembryanthemum crystallinum L.) is a widely studied model due to its tolerance to numerous biotic and abiotic stresses. In this study, carried out in model pots, the plants were treated with variant doses of Cd(II) and Cr(VI) and proved resistant to extreme levels of these heavy metals. Initial toxicity symptoms were observed upon final concentrations of 818 mg Cd kg−1 soil d.w., and 1699 mg Cr kg−1 applied as potassium chromate. Biometric analyses revealed that none of the Cr(VI) doses affected dry weight of the plant organs thus maintaining the shoot-to-root ratio. The Cd and Cr hypertolerance strategies were divergent and resulted in different accumulation patterns. For the case of Cd(II), an excluder-like mechanism was developed to prevent the plant from toxicity. For chromate, high accumulation potential together with Cr(VI) root-to-shoot translocation at sublethal concentrations was revealed (up to 6152 mg Cr kg−1 shoot at 4248 mg Cr kg−1 soil). It is concluded that M. crystallinum reveals considerable phytoremediation capabilities due to unique growth potential in contaminated substrates and is suitable for bioreclamation of degraded soils. The plant is especially applicable for efficient phytoextraction of chromate-contamination, whereas for Cd-affected areas it may have a phytostabilizing effect.

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Section: Resultssupporting

confidence: 92%

Section: Discussionsupporting

confidence: 90%

The Common Ice Plant (Mesembryanthemum crystallinum L.)–Phytoremediation Potential for Cadmium and Chromate-Contaminated Soils

Śliwa-Cebula

Kaszycki

Kaczmarczyk

et al. 2020

Plants

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“…It was also confirmed that high doses of Ni did not induce any growth or developmental disturbances [9,21,22]. In our studies, we described high tolerance of soil-grown ice plants towards elevated Cd levels, regardless of the photosynthetic metabolism [23]. The obtained data strongly suggest the potential use of M. crystallinum in the phytoremediation of HM-polluted areas.…”

Section: Introductionsupporting

confidence: 86%

“…In our previous paper, we showed that Cd concentrations up to 1 mM had no detrimental effects on soil-grown ice plants [23]. In this study, with the treatment extended to a Cd concentration of 10 mM, no visible morphological symptoms of heavy metal stress in either NaCl-untreated (−NaCl) or salt-stressed (+NaCl) plants were observed.…”

Section: Cadmium Treatment Up To 10 MM Does Not Affect the Growth Andsupporting

confidence: 41%

“…It is worth mentioning that, upon administration of the highest Cd treatment (10 mM), the salt-stressed (+NaCl) plants, beginning on the first day of the experiment, were exposed to a significantly higher concentration of bioavailable Cd in comparison to the NaCl-untreated plants. According to our preceding study concerning the M. crystallinum-Cd interaction [23], we focused on the results of the eighth day of treatment. In this study, we confirmed our previous observations by showing that with up to 0.1 mM treatment, the amount of bioavailable Cd was very low ( Figure 1A).…”

Section: Nacl-stressed Plants Accumulated More CD Than Nacl-untreatedmentioning

confidence: 99%

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Expression of Genes Involved in Heavy Metal Trafficking in Plants Exposed to Salinity Stress and Elevated Cd Concentrations

Nosek

Kaczmarczyk

Jędrzejczyk

et al. 2020

Plants

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Many areas intended for crop production suffer from the concomitant occurrence of heavy metal pollution and elevated salinity; therefore, halophytes seem to represent a promising perspective for the bioremediation of contaminated soils. In this study, the influence of Cd treatment (0.01-10.0 mM) and salinity stress (0.4 M NaCl) on the expression of genes involved in heavy metal uptake (irt2-iron-regulated protein 2, zip4-zinc-induced protein 4), vacuolar sequestration (abcc2-ATP-binding cassette 2, cax4-cation exchanger 2 pcs1-phytochelatin synthase 1) and translocation into aerial organs (hma4-heavy metal ATPase 4) were analyzed in a soil-grown semi-halophyte Mesembryanthemum crystallinum. The upregulation of irt2 expression induced by salinity was additionally enhanced by Cd treatment. Such changes were not observed for zip4. Stressor-induced alterations in abcc2, cax4, hma4 and pcs1 expression were most pronounced in the root tissue, and the expression of cax4, hma4 and pcs1 was upregulated in response to salinity and Cd. However, the cumulative effect of both stressors, similar to the one described for irt2, was observed only in the case of pcs1. The importance of salt stress in the irt2 expression regulation mechanism is proposed. To the best of our knowledge, this study is the first to report the combined effect of salinity and heavy metal stress on genes involved in heavy metal trafficking.Plants 2020, 9, 475 2 of 15 by the occurrence of three symptoms: first, increased osmotic pressure, which results in water deficit conditions; second, accumulation of toxic ions in plant organs [4]; and third, nutritional imbalance, which influences the growth and development of challenged plants [5]. These symptoms are primarily responsible for adverse alterations in morphological, physiological and biochemical processes that disrupt the agricultural production and ecological balance of the area [3].Many areas, including arable lands, suffer from concomitant contamination with heavy metals (HMs) and salts. Recently, the accumulation of HMs in the environment has increased as a consequence of intensified human activities, such as mining, smelting and agricultural practices, including the long-term application of fertilizers, fungicides or pesticides [6]. Since HMs are non-degradable, they may persist in a contaminated substrate for decades [7]. The threat posed by heavy metals to humans has an origin in plants, which are the first link in the food chain. Plants can take up HMs from various sources, such as air, water or soil; the latter process predominates and is dependent on many factors, such as temperature, soil pH, aeration and, clearly, on the particular species involved in the accumulation process.Cadmium is one of the HMs that is particularly widely spread in the environment and has gained prominence as an important issue not only in urbanized lands, but also in less explored, rural, agricultural or wildlife areas. Cd toxicity results from altered uptake and transport of nutrient elements (Ca, Mg, P), disruption ...

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Optimum growth and quality of the edible ice plant under saline conditions

Rodríguez‐Hernández

Garmendia

2021

J Sci Food Agric

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BACKGROUND: Ice plant is a halophyte, known for its antioxidant activity and for being a highly functional food. It is capable of increasing its contents of health-promoting compounds when subjected to certain stresses such as salinity. The objective of this work was to determine the plant's best growing conditions to achieve both an optimal production of bioactive metabolites and high crop yield. Mesembryanthemum crystallinum were grown under semi-controlled conditions and four saline treatments were applied at: 0, 100, 200 and 300 mmol L -1 sodium chloride (NaCl), respectively. RESULTS: The 100 mmol L -1 NaCl treatment induced a slight increase in shoot dry weight (DW) and enhanced the leaf area. At higher salinity levels, however, the shoot biomass decreased. The concentration of starch and total proteins declined as the concentration of salt increased, while the total soluble sugars (TSS) content was lower in 100 and 300 mmol L -1 NaCl treatments. Proline increased in conditions over 100 mmol L -1 NaCl. Furthermore, plants grown with 300 mmol L -1 of NaCl presented the highest values of glutathione, ascorbic acid and vitamin C. Antioxidant enzymes activity and total phenolics increased with the severity of the salinity. CONCLUSION: Ice plant accumulates high levels of health-promoting compounds when grown with 300 mmol L -1 NaCl. A high concentration of beneficial compounds, however, is detrimental to the plant's growth. Moreover, 100 mmol L -1 NaCl treatment not only improved the concentration of bioactive and antioxidant compounds but also preserved the crop yield. It could thus be interesting to promote the cultivation of this high nutritional value plant in environments of moderate salinity.

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The response of a model C3/CAM intermediate semi-halophyte Mesembryanthemum crystallinum L. to elevated cadmium concentrations

Cited by 15 publications

References 50 publications

The Common Ice Plant (Mesembryanthemum crystallinum L.)–Phytoremediation Potential for Cadmium and Chromate-Contaminated Soils

The Common Ice Plant (Mesembryanthemum crystallinum L.)–Phytoremediation Potential for Cadmium and Chromate-Contaminated Soils

Expression of Genes Involved in Heavy Metal Trafficking in Plants Exposed to Salinity Stress and Elevated Cd Concentrations

Optimum growth and quality of the edible ice plant under saline conditions

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