Synergistic Effects of Zinc Oxide Nanoparticles and Bacteria Reduce Heavy Metals Toxicity in Rice (Oryza sativa L.) Plant

Akhtar, Nazneen; Khan, Sehresh; Rehman, Shafiq Ur; Rehman, Zia Ur; Khatoon, Amana; Rha, Eui Shik; Jamil, Muhammad

doi:10.3390/toxics9050113

Cited by 53 publications

(17 citation statements)

References 43 publications

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“…Parallel responses were observed in G. hirsutum when it was treated with ZnO NPs for tolerating Cd and Pb stresses [138]. The potential of ZnO NPs in the clearing of HM-contaminated media was established in a study performed in rice [109].…”

Section: Metal/metalloid Toxicitymentioning

confidence: 99%

Metal/Metalloid-Based Nanomaterials for Plant Abiotic Stress Tolerance: An Overview of the Mechanisms

Sarraf

Vishwakarma

Kumar³

et al. 2022

Plants

131

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In agriculture, abiotic stress is one of the critical issues impacting the crop productivity and yield. Such stress factors lead to the generation of reactive oxygen species, membrane damage, and other plant metabolic activities. To neutralize the harmful effects of abiotic stress, several strategies have been employed that include the utilization of nanomaterials. Nanomaterials are now gaining attention worldwide to protect plant growth against abiotic stresses such as drought, salinity, heavy metals, extreme temperatures, flooding, etc. However, their behavior is significantly impacted by the dose in which they are being used in agriculture. Furthermore, the action of nanomaterials in plants under various stresses still require understanding. Hence, with this background, the present review envisages to highlight beneficial role of nanomaterials in plants, their mode of action, and their mechanism in overcoming various abiotic stresses. It also emphasizes upon antioxidant activities of different nanomaterials and their dose-dependent variability in plants’ growth under stress. Nevertheless, limitations of using nanomaterials in agriculture are also presented in this review.

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Section: Metal/metalloid Toxicitymentioning

confidence: 99%

Metal/Metalloid-Based Nanomaterials for Plant Abiotic Stress Tolerance: An Overview of the Mechanisms

Sarraf

Vishwakarma

Kumar³

et al. 2022

Plants

131

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“…ZnO-NPs can remove HMs from the surface with the exchange of HM ions in water solutions to improve plant growth ( Venkatachalam et al, 2017a ). It has been shown that excess HMs in plants lead to the generation of ROS compounds and oxidative stress in the plant ( Gechev and Petrov, 2020 ; Wani et al, 2021 ), which cause damage that includes wall thickness, osmotic shock or stress, decreased water potential and transpiration, lipid membrane, protein, cell nuclear and DNA injury and, finally, the disturbance of plant photosynthesis, and plant growth and development ( Akhtar et al, 2021 ). Therefore, plants adopt a different strategy in the form of antioxidant defense to scavenge ROS compounds ( Emamverdian et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Zinc Oxide Nanoparticles Improve Pleioblastus pygmaeus Plant Tolerance to Arsenic and Mercury by Stimulating Antioxidant Defense and Reducing the Metal Accumulation and Translocation

et al. 2022

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The utilization of nanoparticles to potentially reduce toxicity from metals/metalloids in plants has increased in recent years, which can help them to achieve tolerance under the stressful conditions. An in vitro experiment was conducted to investigate five different levels of zinc oxide nanoparticles (ZnO-NPs; 0, 50, 100, 150, and 200 μM) both alone and in combination with 150 μM arsenic (As) and 150 μM mercury (Hg) in one-year-old Pleioblastus pygmaeus (Miq.) Nakai plants through four replications. The results demonstrated that As and Hg alone had damaging effects on the plant growth and development. However, the addition of various concentrations of ZnO-NPs led to increased antioxidant activity, proline (79%) content, glycine betaine (71%) content, tyrosine ammonia-lyase (43%) activity, phenylalanine ammonia-lyase (69%) activity, chlorophyll indices, and eventually plant biomass, while the lipoxygenase activity, electrolyte leakage, soluble protein, hydrogen peroxide content, and thiobarbituric acid reactive substances were reduced. We concluded that ZnO-NPs detoxified As and Hg toxicity in the plants through increasing antioxidant activity, reducing As and Hg accumulation, As and Hg translocation from roots to shoots, and adjusting stomatal closure. This detoxification was further confirmed by the reduction of the translocation factor of As and Hg and the enhancement of the tolerance index in combination with ZnO-NPs. However, there is a need for further investigation with different metals/metalloids.

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“…For Lycopersicon esculentum , supplementing Pseudomonas aeruginosa in the soil resulted in less Cd uptake due to the complexation of Cd and its immobilization (Khanna et al, 2019). In the past few years, research has demonstrated that enhanced results can be achieved by combining microbial plant priming methods with other priming molecules, such as the combination of putrescine and Bacillus thuringiensis IAGS 199 for alleviation of cadmium stress in Capsicum annum (Shah et al, 2020), or combination of zinc oxide nanoparticles and bacteria for reduction of metal toxicity in rice (Akhtar et al, 2021).…”

Section: Enhanced Phytoextraction Of CD By Primingmentioning

confidence: 99%

Thinking for the future: Phytoextraction of cadmium using primed plants for sustainable soil clean‐up

Karalija

Selović

Bešta-Gajević

et al. 2022

Physiologia Plantarum

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Cadmium (Cd) soil contamination is a global problem for food security due to its ubiquity, toxicity at low levels, persistence, and bioaccumulation in living organisms. Humans' intake of heavy metals is usually due to direct contact with contaminated soil, through the food chain (Cd accumulation in crops and edible plants) or through drinking water in cases of coupled groundwater‐surface water systems. Phytoextraction is one of the eco‐friendly, sustainable solutions that can be used as a method for soil clean‐up with the possibility of re‐use of extracted metals through phytomining. Phytoextraction is often limited by the tolerance level of hyperaccumulating plants and the restriction of their growth. Mechanisms of hyperaccumulation of heavy metals in tolerant species have been studied, but there are almost no data on mechanisms of further improvement of the accumulation capacity of such plants. Priming can influence plant stress tolerance by the initiation of mild stress cues resulting in acclimation of the plant. The potential of plant priming in abiotic stress tolerance has been extensively investigated using different types of molecules that are supplemented exogenously to plant organs (roots, leaves, etc.), resulting in enhanced tolerance of abiotic stress. This review focuses on mechanisms of enhancement of plant stress tolerance in hyperaccumulating plants for their exploitation in phytoextraction processes.

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Synergistic Effects of Zinc Oxide Nanoparticles and Bacteria Reduce Heavy Metals Toxicity in Rice (Oryza sativa L.) Plant

Cited by 53 publications

References 43 publications

Metal/Metalloid-Based Nanomaterials for Plant Abiotic Stress Tolerance: An Overview of the Mechanisms

Metal/Metalloid-Based Nanomaterials for Plant Abiotic Stress Tolerance: An Overview of the Mechanisms

Zinc Oxide Nanoparticles Improve Pleioblastus pygmaeus Plant Tolerance to Arsenic and Mercury by Stimulating Antioxidant Defense and Reducing the Metal Accumulation and Translocation

Thinking for the future: Phytoextraction of cadmium using primed plants for sustainable soil clean‐up

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