Exogenously applied calcium regulates antioxidative system and reduces cadmium-uptake in Fagopyrum esculentum

Hakeem, Khalid Rehman; Alharby, Hesham F.; Pirzadah, Tanveer Bilal

doi:10.1016/j.plaphy.2022.03.011

Cited by 19 publications

(11 citation statements)

References 60 publications

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“…Li et al, (2017b) found that the presence of 10 mM Ca 2+ and Mg 2+ significantly inhibited Cd 2+ uptake by Sedum plumbizincicola , and the higher Ca 2+ and Mg 2+ concentrations induced lower Cd accumulation, for instance, the Cd contents in the plants reduced from 1121.8 μg/g to 562.5 μg/g when the concentration of Ca 2+ shifted from 0.1 mM to 10 mM in solutions [ 29 ]. Hakeem et al, (2022) suggested that the root and shoot biomass of Fagopyrum esculentum was enhanced by 7.57% and 11.11%, respectively, under 200 mgL −1 Cd 2+ treatments with 300 mgL −1 Ca 2+ when compared to the controls, and the exogenous Ca 2+ significantly promoted Cd retention in roots and alleviated the Cd-induced oxidative damage [ 36 ]. Liu et al (2020) discovered that 25 μM Cd treatment with 0.5 mM Ca significantly increased the Cd contents in the roots of Sedum alfredii , but the Cd contents in shoots decreased under Cd treatment with 8 mM Ca [ 37 ].…”

Section: Discussionmentioning

confidence: 99%

Influencing Factors of Bidens pilosa L. Hyperaccumulating Cadmium Explored by the Real-Time Uptake of Cd2+ Influx around Root Apexes under Different Exogenous Nutrient Ion Levels

Wang

Dai

et al. 2023

Toxics

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Though Bidens pilosa L. has been confirmed to be a potential Cd hyperaccumulator, the accumulation mechanism is not yet clear. The dynamic and real-time uptake of Cd2+ influx by B. pilosa root apexes was determined using non-invasive micro-test technology (NMT), which partly explored the influencing factors of the Cd hyperaccumulation mechanism under the conditions of different exogenous nutrient ions. The results indicated that Cd2+ influxes at 300 μm around the root tips decreased under Cd treatments with 16 mM Ca2+, 8 mM Mg2+, 0.5 mM Fe2+, 8 mM SO42− or 18 mM K+ compared to single Cd treatments. The Cd treatments with a high concentration of nutrient ions showed an antagonistic effect on Cd2+ uptake. However, Cd treatments with 1 mM Ca2+, 0.5 mM Mg2+, 0.5 mM SO42− or 2 mM K+ had no effect on the Cd2+ influxes as compared with single Cd treatments. It is worth noting that the Cd treatment with 0.05 mM Fe2+ markedly increased Cd2+ influxes. The addition of 0.05 mM Fe2+ exhibited a synergistic effect on Cd uptake, which could be low concentration Fe2+ rarely involved in blocking Cd2+ influx and often forming an oxide membrane on the root surface to help the Cd uptake by B. pilosa. The results also showed that Cd treatments with high concentration of nutrient ions significantly increased the concentrations of chlorophyll and carotenoid in leaves and the root vigor of B. pilosa relative to single Cd treatments. Our research provides novel perspectives with respect to Cd uptake dynamic characteristics by B. pilosa roots under different exogenous nutrient ion levels, and shows that the addition of 0.05 mM Fe2+ could promote the phytoremediation efficiency for B. pilosa.

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Section: Discussionmentioning

confidence: 99%

Influencing Factors of Bidens pilosa L. Hyperaccumulating Cadmium Explored by the Real-Time Uptake of Cd2+ Influx around Root Apexes under Different Exogenous Nutrient Ion Levels

Wang

Dai

et al. 2023

Toxics

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“…•and H 2 O 2 ) and MDA content was observed in wheat seedlings under drought stress (Figure 4), an indication that the cell membranes were severely damaged by stress. It has been demonstrated that improved antioxidant enzymes (SOD, POD, CAT, and APX) activities and protective solute (Pro and soluble protein) accumulation (Figure 5) play an important role in ROS detoxification under environmental stress conditions, can safeguard cell membrane structure stability to maintain normal function [46,47], and are tightly associated with stress resistance, especially drought stress [26,48,49]. The application of exogenous uniconazole enhanced cell membrane stability and reduced membrane damage to improve drought resistance by inhibiting the increase in ROS (O 2…”

Section: Discussionmentioning

confidence: 99%

Exogenous Uniconazole Application Positively Regulates Carbon Metabolism under Drought Stress in Wheat Seedlings

Jiang,

Rong,

Wang

et al. 2023

Agronomy

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Drought is one of the most detrimental environmental factors restricting the growth of wheat (Triticum aestivum L.). The investigation of the impact of uniconazole on carbon metabolism in wheat seedlings under drought stress could provide new insights into wheat stress physiology and tolerance. The effects of uniconazole (30 mg L−1) on wheat drought tolerance were investigated via a physiological analysis of the wheat genotypes ‘Wansu 1510’ (WS1510) and ‘Huacheng wheat 1688’ (HC1688) under a 15% polyethylene glycol (PEG) and 30% PEG treatment and a transcriptome analysis of ‘Wansu 1510’ (WS1510) under a 30% PEG treatment. The results revealed that uniconazole significantly increased the leaf relative water content (RWC), reduced plant height, and counteracted the reduction in fresh weight and root length under drought stress. It inhibited the excessive accumulation of reactive oxygen species (ROS) and protected against membrane lipid peroxidation caused by drought stress by regulating superoxide dismutase (SOD) gene expression, enhancing antioxidant enzymes activities, and adjusting the content of osmoregulatory compounds in drought-stressed plants. Furthermore, uniconazole treatment increased chlorophyll (Chl) and carotenoid (Car) contents, inhibited the increase in sucrose concentration, and alleviated the reduction in starch content due to increased sucrose synthase (SS) activity under drought stress. Transcriptome sequencing revealed that uniconazole regulated the expression of genes associated with starch and sucrose metabolism, porphyrin and chlorophyll metabolism, the photosynthetic antenna proteins, carotenoid biosynthesis, and carbon fixation in photosynthetic organisms, which are involved in carbon metabolism processes and photosynthetic pigment production and which regulate the conversion of sucrose and starch under drought stress. Our findings emphasize the importance of exogenous uniconazole in regulating carbon metabolism in wheat.

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“…Ca is essential for plant growth and development [ 233 ]. When used as an exogenous substance, Ca can reduce Cd-induced physiological and biochemical disorders [ 234 ], and also down-regulate Cd accumulation by decreasing the negative charge of the cell membrane surface [ 235 ] in Salix matsudana [ 236 ] and Fagopyrum esculentum [ 237 ]. As one of the beneficial elements, Se plays an important role in improving plant stress tolerance.…”

Section: Effect Of Exogenous Substances On Phytoremediation Of Soil C...mentioning

confidence: 99%

The Uptake, Transfer, and Detoxification of Cadmium in Plants and Its Exogenous Effects

Zhang,

Yang,

Yang

et al. 2024

Cells

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Cadmium (Cd) exerts a toxic influence on numerous crucial growth and development processes in plants, notably affecting seed germination rate, transpiration rate, chlorophyll content, and biomass. While considerable advances in Cd uptake and detoxification of plants have been made, the mechanisms by which plants adapt to and tolerate Cd toxicity remain elusive. This review focuses on the relationship between Cd and plants and the prospects for phytoremediation of Cd pollution. We highlight the following issues: (1) the present state of Cd pollution and its associated hazards, encompassing the sources and distribution of Cd and the risks posed to human health; (2) the mechanisms underlying the uptake and transport of Cd, including the physiological processes associated with the uptake, translocation, and detoxification of Cd, as well as the pertinent gene families implicated in these processes; (3) the detrimental effects of Cd on plants and the mechanisms of detoxification, such as the activation of resistance genes, root chelation, vacuolar compartmentalization, the activation of antioxidant systems and the generation of non-enzymatic antioxidants; (4) the practical application of phytoremediation and the impact of incorporating exogenous substances on the Cd tolerance of plants.

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Exogenously applied calcium regulates antioxidative system and reduces cadmium-uptake in Fagopyrum esculentum

Cited by 19 publications

References 60 publications

Influencing Factors of Bidens pilosa L. Hyperaccumulating Cadmium Explored by the Real-Time Uptake of Cd2+ Influx around Root Apexes under Different Exogenous Nutrient Ion Levels

Influencing Factors of Bidens pilosa L. Hyperaccumulating Cadmium Explored by the Real-Time Uptake of Cd2+ Influx around Root Apexes under Different Exogenous Nutrient Ion Levels

Exogenous Uniconazole Application Positively Regulates Carbon Metabolism under Drought Stress in Wheat Seedlings

The Uptake, Transfer, and Detoxification of Cadmium in Plants and Its Exogenous Effects

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