Physiological and Biochemical Mechanisms Preventing Cd Toxicity in the New Hyperaccumulator Abelmoschus manihot

Wu, Manxia; Luo, Qiao; Zhao, Yin; Lei, Yang; Liu, Shiliang; Pan, Yuanzhi

doi:10.1007/s00344-017-9765-8

Cited by 55 publications

(35 citation statements)

References 46 publications

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“…Wu et al [52] described an increase in the net photosynthesis rate by Cd application, which translated to an increase in the net biomass. On the contrary, Cd toxicity has been reported to inhibit plant growth by decreasing the water-use efficiency (WUE) and the net rate of photosynthesis [53].…”

Section: Plant Responses To Cadmium Toxicitymentioning

confidence: 99%

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Raza

Habib

Najafi-Kakavand

et al. 2020

Biology

168

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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: Plant Responses To Cadmium Toxicitymentioning

confidence: 99%

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Raza

Habib

Najafi-Kakavand

et al. 2020

Biology

168

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“…In C. didymus, TF reported to be higher than BCF [ 127 ]. In A. manihot, BCF values exceeded the reference value and TF values were also found to be greater than 1 on Cd treatment at 15–60 mg kg −1 [ 128 ]. It has been also reported in both the studies that superoxide anion amount, H 2 O 2 content and antioxidative activities in roots and shoots get enhanced on exposure of a high dose of Cd which helps in the detoxification process [ 127 , 128 ].…”

Section: Phytoremediation Of CD In Contaminated Soilmentioning

confidence: 99%

“…PCs were also found as Cd-binding peptides through carboxyl and the sulfhydryl residues in presence of enzyme phytochelatin synthase (PCS) and Cd thought to be acting as cofactor for glutathione to PCs conversions [ 163 ]. Also, various types of reactive oxygen species (ROS) such as superoxide anion O 2- and H 2 O 2 and antioxidative enzymes induced detoxification process of Cd at high Cd concentrations [ 127 , 128 ]. A schematic representation of Cd detoxification in plant cell is given in Figure 6 .…”

Section: Uptake Mechanism and Detoxification Of CD In Plantsmentioning

confidence: 99%

Role of Phytoremediation in Reducing Cadmium Toxicity in Soil and Water

Mahajan

Kaushal

2018

Journal of Toxicology

138

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Heavy metals are a noxious form of pollutants present in soil and water. A new plant-based solar energy driven technology, phytoremediation, emerges as eco-friendly and cost-effective approach to remove heavy metal from various media with the help of hyperaccumulating plant species. This review paper aims to provide information on phytoremediation and its mechanisms for heavy metal removal especially to focus on Cadmium (Cd) metal and highlights the role of various hyperaccumulating plants for Cd metal remediation in soil and water. It complies various field case studies which play the important role in understanding the Cd removal through various plants. Additionally, it pinpoints several sources and the effects of Cd and other technologies used for Cd remediation. This paper provides the recent development in mechanisms of Cd hyperaccumulation by different plants, in order to motivate further research in this field.

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“…In nonhyperaccumulator plants, heavy metals at high concentration like Zn in wheat (Li et al 2013) and Cu in Solanum nigrum (Fidalgo et al 2013) led to an inhibition of the antioxidant enzyme. Halophytes are expected to be more capable to cope with heavy metal stress than common plants (Wu et al 2017) due to a more efficient antioxidant system (Perez-Romero et al 2016). For example, halophyte Salicornia brachiata can upregulate the activity of CAT and SOD and have lower damage to lipid membrane from ROS in response to heavy metals such as Cd, Ni, and arsenic (As) (Sharma et al 2010;Wang et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Long-Term Effect of Heavy Metal–Polluted Wastewater Irrigation on Physiological and Ecological Parameters of Salicornia europaea L.

Khalilzadeh

Пирзад

Sepehr

et al. 2020

J Soil Sci Plant Nutr

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Irrigation of Salicornia europaea with heavy metal-polluted wastewater is a promising alternative method for risk mitigation of the Urmia Lake ecosystem from uncontrolled sewage. The objective of the study was to evaluate morphological and physicochemical responses of Salicornia europaea under wastewater irrigation at different growth stages. A field experiment was conducted in a split-plot experiment based on randomized complete block design with four replications. Treatments included control and wastewater irrigation (containing zinc (Zn), iron (Fe), copper (Cu), cadmium (Cd), lead (Pb), and nickel (Ni)) at three stages (vegetative, flowering, and reproductive) of plant growth and two times (two and 4 days in each stage). The result showed that the wastewater application at reproductive stage resulted in higher biomass production than that of the control plants. Wastewater irrigation at the flowering stage caused a significant increase in the amount of total chlorophyll and chlorophyll-a, while chlorophyll-b content was decreased at both flowering and reproductive stages. The amount of the total soluble protein was also affected, with wastewater irrigation showing the most significant increase at the reproductive stage. There was significant enhancement of osmolytes in leaves of plant under heavy metal stress, and the increased rate of proline was higher than soluble sugar at the flowering stage. Relative water content in Salicornia was not duration-and time-dependent. A 154% increase in catalase activity, 32% increase in peroxidase activity, and 57% increase in polyphenol oxidase activity were observed in the plant exposed to long-term wastewater duration. Based on the observed positive effect of wastewater on shoot length and weight, total soluble protein, proline, soluble sugar, enzyme activities, and plant biomass of Salicornia europaea, long-term effect of heavy metal-polluted wastewater irrigation can be approved for Salicornia crops in coastal areas.

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Physiological and Biochemical Mechanisms Preventing Cd Toxicity in the New Hyperaccumulator Abelmoschus manihot

Cited by 55 publications

References 46 publications

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Role of Phytoremediation in Reducing Cadmium Toxicity in Soil and Water

Long-Term Effect of Heavy Metal–Polluted Wastewater Irrigation on Physiological and Ecological Parameters of Salicornia europaea L.

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