Foliar spray of TiO2 nanoparticles prevails over root application in reducing Cd accumulation and mitigating Cd-induced phytotoxicity in maize (Zea mays L.)

Lian, Jia; Zhao, Longfei; Wu, Jiani; Xiong, Hongxia; Bao, Yongbo; Zeb, Aurang; Tang, Jingchun; Liu, Weitao

doi:10.1016/j.chemosphere.2019.124794

Cited by 172 publications

(47 citation statements)

References 49 publications

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“…As 'PH4CV' underwent a significant change in the citrate cycle and metabolism of glyoxylic acid and dicarboxylic acid, 'PH6WC' changed mainly galactose metabolism, mineral absorption, biosynthesis and metabolism of fatty acids, and glyceryl phosphatide metabolism. By studying the response maize to Cd stress, Lian (2019) found that galactose metabolism, the citrate cycle, and the metabolism of related amino acids could relieve Cd poisoning of maize, which is similar to the findings of this paper. Changes in the content of saccharides, fatty acids, unsaturated fatty acids, and Mg 2+ are all closely related to the salt tolerance of maize.…”

Section: Discussionsupporting

confidence: 88%

Comparative metabolomic profiling in the roots of salt-tolerant and salt-intolerant maize cultivars treated with NaCl stress

Yue¹,

Wang²,

Dou³

et al. 2020

Biol. plant.

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Maize crops are sensitive to NaCl stress, which is one of the most harmful abiotic stresses affecting agricultural productivity. To gain further insights into the differential metabolic responses to NaCl stress, we employed metabolomics and physiological approaches to understand the response of salt-tolerant (PH6WC) and sensitive (PH4CV) cultivars of maize. Salt stress caused a significant reduction in root growth, lower root numbers, softened roots, leaf etiolation, inhibition of leaf formation, and decreased shoot height and stem width in both the tolerant and sensitive genotypes compared with the control. These morphological characteristics increased with the progression of the NaCl concentration, however, they were less prominent in the salt-tolerant genotype. Evans blue staining demonstrated that NaCl-induced root cell death, and the root cells of 'PH4CV' were almost completely dead following 9 d of exposure to 100 mM NaCl. Under treatment with 100 mM NaCl, 79 compounds in the roots of 'PH4CV' were identified as being significant metabolites, and 85 compounds were identified as being significant metabolites in the roots of 'PH6WC'. The NaCl-induced changes in the metabolomes of these two maize cultivars indicate that 80 root-based compounds were different between NaCl-treated plants and controls. Among these metabolites, 30 were found in both maize cultivars when responding to NaCl stress. These compounds were associated with the metabolism of some basic compounds such as cis-9-palmitoleic acid, L-pyroglutamic acid, galactinol, deoxyadenosine, and adenine. The changing abundance of the 30 metabolites was not completely consistent in 'PH4CV' and 'PH6WC'. Glucose metabolism was exclusively induced by NaCl in the 'PH4CV' maize seedlings whereas nucleic acid metabolism was more significant in the 'PH6WC' maize seedlings in response to NaCl stress. Overall, 'PH6WC' and 'PH4CV' responded differently to NaCl stress, and this information is helpful in understanding how maize seedlings respond to this type of abiotic stress.

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Section: Discussionsupporting

confidence: 88%

Comparative metabolomic profiling in the roots of salt-tolerant and salt-intolerant maize cultivars treated with NaCl stress

Yue¹,

Wang²,

Dou³

et al. 2020

Biol. plant.

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“…The literature suggests that Cd stress decreased the root-shoot length in wheat [45], peas [46], Corchorus capsularis [47], and Suaeda glauca [48]. Further, it has been documented to reduce the dry weight in wheat [49], maize [50], and tomatoes [51].…”

Section: Plant Responses To Cadmium Toxicitymentioning

confidence: 99%

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Raza

Habib

Najafi-Kakavand

et al. 2020

Biology

158

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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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“…The positive impact of TiO2 NP on root length, hormone concentration, antioxidant enzyme activity of Cd stressed rice indicated the healing capacity of this NP though seedling biomass remains unaltered (116). Successful inhibition of Cd absorption by foliar spray of TiO2 NP in maize grown in moderate to higher soil Cd concentration (100-250 mg/l) was also documented (117). Moreover SOD and GST activity was elicited which corresponds to increase in various metabolic routes to mitigate Cd toxicity of maize.…”

Section: Titanium Oxide Npsmentioning

confidence: 82%

Nanoparticles mediated cadmium toxicity amelioration in plants

Chakraborty¹,

Pal²,

Paul

2021

Plant Sci. Today

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Application of nanoparticles to address various environmental issues; especially heavy metal contaminated soil restoration is of global interest. Indiscriminate usage of phosphate fertilizer and other anthropogenic activities contribute to Cd contamination of soil, resulting in degradation of soil quality and low crop yield. By the virtue of unique physiochemical characteristics, nanoparticles (NPs) are effective enough for heavy metal stress mitigation. This review has focused on Cd uptake, accumulation and toxicity in plants followed by the successful application of different metallic and non metallic NPs for soil Cd decontamination. Positive impact of NPs as plant growth elicitor under Cd stress has been explored here. Various ways of NP application (soil, foliar, hydroponics), uptake, mode of action and effective treatment concentration have been highlighted. We have collected handful information regarding the use of NPs as nanofertilizer and nanopesticides. The negative effects of NPs have not been considered here. More in depth study to be conducted for better illumination on plant - NPs interaction, mobilization mechanism and biological activities. Though this review summarizes few facts among various aspect of NP but can be counted as a supportive documentation for the better use of NPs in environmental protection in future.

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Foliar spray of TiO2 nanoparticles prevails over root application in reducing Cd accumulation and mitigating Cd-induced phytotoxicity in maize (Zea mays L.)

Cited by 172 publications

References 49 publications

Comparative metabolomic profiling in the roots of salt-tolerant and salt-intolerant maize cultivars treated with NaCl stress

Comparative metabolomic profiling in the roots of salt-tolerant and salt-intolerant maize cultivars treated with NaCl stress

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Nanoparticles mediated cadmium toxicity amelioration in plants

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