Antioxidant Defense Response in Plants to Cadmium Stress

Marques, Deyvid Novaes; Carvalho, Marcia Eugenia Amaral; Piotto, Fernando Ângelo; Batagin-Piotto, Katherine Derlene; Nogueira, Marina de Lima; Gaziola, Salete Aparecida

doi:10.1016/b978-0-12-815794-7.00016-3

Cited by 16 publications

(8 citation statements)

References 243 publications

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“…Plants have an established mechanism to eradicate oxidative impairment through the protective antioxidant defense system that includes enzymatic antioxidants (SOD, CAT, APX, glutathione reductase (GR), glutathione peroxidase (GPX), glutathione S-transferase (GST)) and non-enzymatic antioxidants (GSH, carotenoids, ascorbic acids (AsA), and tocopherol) [179,180]. Antioxidants' response against Cd toxicity varies amongst different plant species and experimental conditions [180]. The modulation of antioxidant machinery during the phytoremediation process is important because it prevents the plant from Cd toxicity.…”

Section: Antioxidant Defense: a Key Mechanism Of Cadmium Tolerance Anmentioning

confidence: 99%

“…Cadmium inhibits the activity of various metabolic cycles and a non-redox active metal that induces many ROS, including H 2 O 2 , superoxide radicals (O 2 •− ), and hydroxyl radical (OH • ). Plants have an established mechanism to eradicate oxidative impairment through the protective antioxidant defense system that includes enzymatic antioxidants (SOD, CAT, APX, glutathione reductase (GR), glutathione peroxidase (GPX), glutathione S -transferase (GST)) and non-enzymatic antioxidants (GSH, carotenoids, ascorbic acids (AsA), and tocopherol) [ 179 , 180 ]. Antioxidants’ response against Cd toxicity varies amongst different plant species and experimental conditions [ 180 ].…”

Section: Antioxidant Defense: a Key Mechanism Of Cadmium Tolerancementioning

confidence: 99%

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Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Raza

Habib

Najafi-Kakavand

et al. 2020

Biology

155

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Cadmium (Cd) is one of the most toxic metals in the environment, and has noxious effects on plant growth and production. Cd-accumulating plants showed reduced growth and productivity. Therefore, remediation of this non-essential and toxic pollutant is a prerequisite. Plant-based phytoremediation methodology is considered as one a secure, environmentally friendly, and cost-effective approach for toxic metal remediation. Phytoremediating plants transport and accumulate Cd inside their roots, shoots, leaves, and vacuoles. Phytoremediation of Cd-contaminated sites through hyperaccumulator plants proves a ground-breaking and profitable choice to combat the contaminants. Moreover, the efficiency of Cd phytoremediation and Cd bioavailability can be improved by using plant growth-promoting bacteria (PGPB). Emerging modern molecular technologies have augmented our insight into the metabolic processes involved in Cd tolerance in regular cultivated crops and hyperaccumulator plants. Plants’ development via genetic engineering tools, like enhanced metal uptake, metal transport, Cd accumulation, and the overall Cd tolerance, unlocks new directions for phytoremediation. In this review, we outline the physiological, biochemical, and molecular mechanisms involved in Cd phytoremediation. Further, a focus on the potential of omics and genetic engineering strategies has been documented for the efficient remediation of a Cd-contaminated environment.

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Section: Antioxidant Defense: a Key Mechanism Of Cadmium Tolerance Anmentioning

confidence: 99%

Section: Antioxidant Defense: a Key Mechanism Of Cadmium Tolerancementioning

confidence: 99%

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Raza

Habib

Najafi-Kakavand

et al. 2020

Biology

155

View full text Add to dashboard Cite

show abstract

“…At the cellular level, Cd also has numerous negative effects, including membrane distortion, production of toxic metabolites, and reactive oxygen species (ROS) (Genchi et al 2020). Excess ROS could be cleared by enzymatic antioxidants, such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), glutathione peroxidase (GPX), and nonenzymatic antioxidants, such as glutathione, proline, and phenolic compounds (Hussain et al 2019;Marques et al 2019) Since nitric oxide (NO) is a diffusible gaseous compound, different sources can provide NO for plants and can be used as exogenous treatments such as sodium nitroprusside (SNP). NO can act as a cellular signaling agent in living organisms (Munawar et al 2019), interact with phytohormones, and perform some biological functions containing plant growth and development, and lead to altered responses under stress conditions (Sharma et al 2020).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Nitric Oxide on Amaranthus Tricolor L. Under Cadmium Stress

Baniasadi¹,

Arghavani²,

Saffari³

et al. 2021

Preprint

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This study aimed to appraise the crosstalk between sodium nitroprusside (SNP), as a source of nitric oxide (NO), and cadmium (Cd) toxicity on growth and physiological traits in Amaranth tricolor L. by using different multivariate statistical methods. The results showed that growth-related traits of A. tricolor were significantly reduced (p<0.05) under Cd stress. Contrarily, Cd treatments increased lipid peroxidation and reduced total protein content. Delving on the results of SNP application showed the suitability of its medium level (100 µM) on increasing the growth-related traits and also plant tolerance to Cd stress via lowering the lipid peroxidation and radical molecules production due to the higher activities of superoxide dismutase and catalase. Increasing the amount of Cd in roots and shoots, as the results of Cd treatment, reduced the growth and production of A. tricolor plants by high rates (over 50% in 60 mg kg-1 Cd level) indicating its susceptibility to high Cd toxicity. Contrarily, treating plants with NO showed no effect on shoot Cd content, while it significantly increased Cd allocation in the root, which might be attributable to the protective effect of NO on Cd toxicity by trapping Cd in the root. Subsequently, the application of a medium level of SNP (around 100 µM) is recommendable for A. tricolor plant to overcome the negative impacts of Cd toxicity.

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“…The comparison of plants with contrasting or differential degrees of tolerance/sensitivity to a given stress is a strategy to effectively determine the contribution of different mechanisms in plant tolerance to abiotic stresses, including Cd toxicity (Marques et al 2019a). The results of some investigations have indicated that modulation of Cd tolerance and sensitivity in tomato plants are not totally explained in terms of Cd accumulation.…”

Section: Introductionmentioning

confidence: 99%

“…The context presented above justifies scientific efforts to study biochemical, physiological, and molecular mechanisms of responses and tolerance coupled with the modulation of Cd accumulation and uptake in crops to cope with Cd toxicity. Cd uptake and accumulation by plants leads to oxidative burst signaling, which is usually considered an early biochemical response to Cd exposure (Marques et al 2019a), together with other tolerance mechanisms that are activated even at early stages of Cd exposure. Thus, it is important to develop management strategies focusing on reducing the Cd uptake and Cd contamination of edible parts of tomato and crop plants in general, in line with the understanding about the role of root and shoot for the observed tolerance pattern, as well as on related endogenous tolerance mechanisms under short-term Cd exposure.…”

Section: Introductionmentioning

confidence: 99%

Tomato genotypes with contrasting cadmium (Cd) tolerance and their reciprocal grafts: Cd uptake, accumulation, and evaluation of biochemical, molecular, and physiological parameters

Marques¹

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Tomato genotypes with contrasting cadmium (Cd) tolerance and their reciprocal grafts: Cd uptake, accumulation, and evaluation of biochemical, molecular, and physiological parameters Cadmium (Cd) is a heavy metal whose concentration has increased considerably over the last few decades in several countries (due to anthropogenic activities). This metal is potentially harmful to human health and plants, and is one of the most threatening contaminants to the environment. However, there are few studies that deal with the development of management strategies to reduce the Cd contamination of edible parts of plants, in line with the understanding of the roles played by root and shoot in the tolerance pattern, as well as focusing on related endogenous mechanisms. Even though studying genotypes with contrasting Cd tolerance is able to reveal important contrasts related to Cd tolerance, accumulation and uptake, there is a lack of studies focused on reciprocally grafted tomato plants regarding Cd tolerance (that is, Cd-tolerant and Cd-sensitive genotypes grafted with each other as rootstock or scion).Here, we performed a study on grafted tomato plants using tomato genotypes with contrasting Cd tolerance. For the present work, reciprocal grafting between tolerant and sensitive tomato genotypes was used as a unprecedented tool, in order to provide a first insight into the organtissue-specific contribution of the tomato genotypes to Cd tolerance mechanisms, uptake and accumulation at early stages of exposure to Cd. We studied the Cd uptake kinetics of the tomato genotypes. Further, we studied enzymatic antioxidant responses in tomato plants. Evaluations of six antioxidant enzymes were performed in addition to the study of Cd accumulation, oxidative stress, bioconcentration factor, phytochelatin synthesis, expression of genes encoding phytochelatin synthases and root transporters, nutrient status and plant growth evaluations. The results showed that, compared with seedlings grafted onto the sensitive root, seedlings grafted onto the tolerant one showed lower Cd uptake, accumulation, and higher efficiency of the enzymatic antioxidant system in response to Cd exposure, in addition to higher concentrations of PCs in roots. Finally, we evaluated the chlorophyll content, proteome and phosphoproteome in leaves of grafted tomato plants. The results provide early evidence for the positive influence of the root system of a tolerant cultivar on the Cd-exposed tomato proteome coupled to Cdinduced phosphoproteomic responses in grafted tomato at an early stage of plant exposure.

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Antioxidant Defense Response in Plants to Cadmium Stress

Cited by 16 publications

References 243 publications

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

The Effect of Nitric Oxide on Amaranthus Tricolor L. Under Cadmium Stress

Tomato genotypes with contrasting cadmium (Cd) tolerance and their reciprocal grafts: Cd uptake, accumulation, and evaluation of biochemical, molecular, and physiological parameters

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