Alleviating effects of calcium on cobalt toxicity in two barley genotypes differing in cobalt tolerance

Lwalaba, Jonas Lwalaba Wa; Zvobgo, Gerald; Fu, Liangbo; Zhang, Xuelei; Mwamba, Theodore M.; Muhammad, Noor; Mundende, Robert Prince Mukobo; Zhang, Guoping

doi:10.1016/j.ecoenv.2017.02.019

Cited by 39 publications

(13 citation statements)

References 42 publications

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“…In this study, cobalt alone increased the osmotic potential and TBARS content while at the same time causing a reduction in H2O2 content in the S. officinalis leaves. Contrary to these findings, cobalt induced a significant reduction in growth and a dramatic increase in lipid peroxidation in barley plants [34]. Although salt and cobalt alone caused a significant reduction in the growth of S. officinalis, the combination of salt and cobalt increased RGR as compared to the salt-treated plants.…”

Section: Discussioncontrasting

confidence: 60%

Cobalt+Salt-Stressed Salvia officinalis: ROS Scavenging Capacity and Antioxidant Potency

Torun

2019

International Journal of Secondary Metabolite

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Salvia officinalis L. (Lamiaceae) is one of the most widespread herbal species used in the food processing industry and for culinary and medicinal purposes. This work aimed to investigate changes in plant growth, water content, lipid peroxidation, H2O2, proline, and enzymes related to reactive oxygen species (ROS) detoxification including superoxide dismutase (SOD), peroxidase (POX), catalase (CAT), ascorbate peroxidase (APX) and glutathione reductase (GR). Phenolic contents and antioxidant capacity values such as ferric ion reducing antioxidant power (FRAP), cupric ion reducing antioxidant capacity (CUPRAC) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging were studied under stress conditions of salt, cobalt and a combination of the two. No significant differences were found in relative water content and chlorophyll fluorescence under salt, cobalt and their combination. However, the osmotic potential and relative growth rate were enhanced with salt+cobalt compared to salt-treated plants. Salt and cobalt individually stimulated high antioxidant activity. High APX and GR activities were associated with the high proline accumulation in the sage plants under the combined effect of salt+cobalt. The combination decreased lipid peroxidation (TBARS), while H2O2 content was increased. This increase with the combined salt+cobalt effect may be associated with the decrease in CAT activity. Moreover, a strong correlation was found between TPC and TF content and antioxidant capacity measured via FRAP, CUPRAC and DPPH. The TPC, TF and antioxidant capacity values also increased under the salt+cobalt combination, suggesting an increase in antioxidant content in the sage leaves. Therefore, the combination of salt and cobalt improved the stress tolerance of S. officinalis.

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Section: Discussioncontrasting

confidence: 60%

Cobalt+Salt-Stressed Salvia officinalis: ROS Scavenging Capacity and Antioxidant Potency

Torun

2019

International Journal of Secondary Metabolite

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“…Values are the means of 6 replications ± SD. The data followed by different letters are significantly different at p≤ 0.05. tolerance to heavy metals (Farzadfar et al 2013, Lwalaba et al 2017) and other stresses (Jiang et al 2001, Xu et al 2013, Methenni et al 2018. Ca 2+ -mediated biomass enhancement might occur due to an increase in the uptake of nutrients by plants under stressful conditions (Khan et al 2012.…”

Section: Discussionmentioning

confidence: 99%

Seed priming with calcium chloride improves the photosynthesis performance of faba bean plants subjected to cadmium stress

Nouairi¹,

Jalali²,

Zribi³

et al. 2019

Photosynt.

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Faba bean (Vicia faba L.) seeds were treated with H2O [nonprimed (NP)] or 2% CaCl2 [primed (P)] before germination for 6 h. After seven days, seedlings were exposed to 0 or 50 µM CdCl2 concentrations for three weeks. Under Cd treatment, P plants showed an improvement of gas-exchange characteristics, chlorophyll (Chl) and carotenoids contents as compared to NP plants subjected to Cd stress. Additionally, the values of Chl fluorescence were relatively similar to those of control, implying that no photodamage occurred. Moreover, under 50 µM Cd, the P plants exhibited lesser accumulation of hydrogen peroxide and superoxide radicals in leaves as compared to NP plants. Likewise, results showed that CaCl2seed pretreatment alleviated adverse effects of Cd on electrolyte leakage. In conclusion, CaCl2 improved photosynthesis attributes of faba bean plants subjected to Cd stress by mitigating the adverse effects of Cd toxicity through a reduced generation of reactive oxygen species.Additional key words: nonphotochemical quenching; photosynthetic apparatus; seed priming; water-use efficiency. electron transport rate; F0 -minimal chlorophyll fluorescence; FM -fresh mass; Fm -maximal chlorophyll fluorescence; Fm' -maximal fluorescence yield of the light-adapted state; Fs -steady-state fluorescence yield; Fv -variable chlorophyll fluorescence; Fv/Fm -maximum photochemical quantum efficiency of PSII; gs − stomatal conductance; NPQ -nonphotochemical quenching; PN -net CO2 assimilation rate; ROS -reactive oxygen species; SE -standard error; WUE -intrinsic water-use efficiency (PN/gs); ФPSII -actual PSII efficiency. Acknowledgements: The authors are grateful for the financial support provided by the Tunisian Ministry of Higher Education and Scientific Research.

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“…Although cobalt is a metal of great value from a biological point of view, as it is an essential enzyme cofactor in most living organisms (Lwalaba et al, 2017), when present in excess, this metal can cause serious health hazards to living being and ecosystems due to its toxicity. Excessive exposure to cobalt was shown to induce numerous diseases such as contact dermatitis, asthma, pneumonia, and lung cancer (Pimentel et al, 2014).…”

Section: Cobaltmentioning

confidence: 99%

Challenges of Microbial Fuel Cell Architecture on Heavy Metal Recovery and Removal From Wastewater

et al. 2019

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Alleviating effects of calcium on cobalt toxicity in two barley genotypes differing in cobalt tolerance

Cited by 39 publications

References 42 publications

Cobalt+Salt-Stressed Salvia officinalis: ROS Scavenging Capacity and Antioxidant Potency

Cobalt+Salt-Stressed Salvia officinalis: ROS Scavenging Capacity and Antioxidant Potency

Seed priming with calcium chloride improves the photosynthesis performance of faba bean plants subjected to cadmium stress

Challenges of Microbial Fuel Cell Architecture on Heavy Metal Recovery and Removal From Wastewater

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