The accumulation of cadmium in wheat (Triticum aestivum) as influenced by zinc oxide nanoparticles and soil moisture conditions

Khan, Zahra Saeed; Rizwan, Muhammad; Hafeez, Muhammad Bilal; Ali, Shafaqat; Javed, Muhammad Rizwan; Adrees, Muhammad

doi:10.1007/s11356-019-05333-5

Cited by 134 publications

(35 citation statements)

References 50 publications

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“…In agreement with this, the relative transcript abundance of Fe/Mn SOD, Cu/Zn SOD, APX, and CAT were significantly up-regulated in nano-ZnO plants under drought, as compared with the N plants. Similarly, nano-ZnO minimizes the oxidative effect of drought in wheat [44]. Thus, the nanoparticles were likely involved in scavenging ROS by activating antioxidant enzyme systems [45].…”

Section: Discussionmentioning

confidence: 99%

Nano-ZnO-Induced Drought Tolerance Is Associated with Melatonin Synthesis and Metabolism in Maize

Sun

Song

Guo

et al. 2020

IJMS

104

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The applications of ZnO nanoparticles in agriculture have largely contributed to crop growth regulation, quality enhancement, and induction of stress tolerance, while the underlying mechanisms remain elusive. Herein, the involvement of melatonin synthesis and metabolism in the process of nano-ZnO induced drought tolerance was investigated in maize. Drought stress resulted in the changes of subcellular ultrastructure, the accumulation of malondialdehyde and osmolytes in leaf. The nano-ZnO (100 mg L−1) application promoted the melatonin synthesis and activated the antioxidant enzyme system, which alleviated drought-induced damage to mitochondria and chloroplast. These changes were associated with upregulation of the relative transcript abundance of Fe/Mn SOD, Cu/Zn SOD, APX, CAT, TDC, SNAT, COMT, and ASMT induced by nano-ZnO application. It was suggested that modifications in endogenous melatonin synthesis were involved in the nano-ZnO induced drought tolerance in maize.

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Section: Discussionmentioning

confidence: 99%

Nano-ZnO-Induced Drought Tolerance Is Associated with Melatonin Synthesis and Metabolism in Maize

Sun

Song

Guo

et al. 2020

IJMS

104

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“…Growth and physio- and biochemical traits such as proline, chlorophyll, carbohydrates, carotenoids and relative water contents were significantly improved in different plant species when NPs were applied such as silica and ZnO nanoparticles [ 235 ]. Si-NPs also enhanced the drought resistance in wheat plants [ 240 , 241 ]. Similarly, the salinity and drought stress in plants were also mitigated by ZnO nanoparticles application (235).…”

Section: Drought-resistance Inductionmentioning

confidence: 99%

“…The increase of SOD and POD activity in wheat crop as drought resistance mechanism was observed through ZnO NPs. The drought resistance in wheat was also enhanced under Zn and Cu NPs [ 241 , 245 ].…”

Section: Drought-resistance Inductionmentioning

confidence: 99%

Drought Stress Impacts on Plants and Different Approaches to Alleviate Its Adverse Effects

Seleiman

Al-Suhaibani

Ali

et al. 2021

Plants

669

296

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Drought stress, being the inevitable factor that exists in various environments without recognizing borders and no clear warning thereby hampering plant biomass production, quality, and energy. It is the key important environmental stress that occurs due to temperature dynamics, light intensity, and low rainfall. Despite this, its cumulative, not obvious impact and multidimensional nature severely affects the plant morphological, physiological, biochemical and molecular attributes with adverse impact on photosynthetic capacity. Coping with water scarcity, plants evolve various complex resistance and adaptation mechanisms including physiological and biochemical responses, which differ with species level. The sophisticated adaptation mechanisms and regularity network that improves the water stress tolerance and adaptation in plants are briefly discussed. Growth pattern and structural dynamics, reduction in transpiration loss through altering stomatal conductance and distribution, leaf rolling, root to shoot ratio dynamics, root length increment, accumulation of compatible solutes, enhancement in transpiration efficiency, osmotic and hormonal regulation, and delayed senescence are the strategies that are adopted by plants under water deficit. Approaches for drought stress alleviations are breeding strategies, molecular and genomics perspectives with special emphasis on the omics technology alteration i.e., metabolomics, proteomics, genomics, transcriptomics, glyomics and phenomics that improve the stress tolerance in plants. For drought stress induction, seed priming, growth hormones, osmoprotectants, silicon (Si), selenium (Se) and potassium application are worth using under drought stress conditions in plants. In addition, drought adaptation through microbes, hydrogel, nanoparticles applications and metabolic engineering techniques that regulate the antioxidant enzymes activity for adaptation to drought stress in plants, enhancing plant tolerance through maintenance in cell homeostasis and ameliorates the adverse effects of water stress are of great potential in agriculture.

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“…Some studies have highlighted the potential functions of ZnO-NPs to decontaminate seeds [13], increase biomass [12][13][14][15], enhance nutrition, especially Zn bioaccumulation [12,13,15], up-regulate primary metabolism [3,12,13], stimulate secondary metabolism [12,13], and improve yield [16]. ZnO-NPs at optimal concentration, additionally, conferred tolerance to stress conditions, like a drought in sorghum [17], Cd in wheat [18], Cd in tomato [6], and Cd in maize [19]. However, there is inadequate knowledge of the molecular mechanisms involved in plant interaction with ZnO-NPs [20].…”

Section: Introductionmentioning

confidence: 99%

Zinc oxide nanoparticles mediated substantial physiological and molecular changes in tomato

et al. 2021

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There has long been debate about how nanoproducts meet agricultural requirements. This study aimed to investigate tomato responses to the long-time foliar application of zinc oxide nanoparticles (ZnO-NP; 0 and 3 mgl-1) or bulk type (BZnO). Both ZnO-NP and BZnO treatments, especially the nanoform, were significantly capable of improving growth, biomass, and yield. The ZnO-NP treatment upregulated the expression of the R2R3MYB transcription factor by 2.6 folds. The BZnO and ZnO-NP treatments transcriptionally up-regulated WRKY1 gene by 2.5 and 6.4 folds, respectively. The bHLH gene was also upregulated in response to BZnO (2.3-fold) or ZnO-NP (4.7-fold). Moreover, the ZnO-NP application made a contribution to upregulation in the EREB gene whereas the bulk compound did not make a significant change. Upregulation in the HsfA1a gene also resulted from the ZnO-NP (2.8-fold) or BZnO (1.6-fold) supplementation. The MKK2 and CAT genes displayed a similar upregulation trend in response to the supplements by an average of 3-folds. While the application of ZnO-NP slightly down-regulated the histone deacetylases (HDA3) gene by 1.9-fold, indicating epigenetic modification. The supplements, especially the nano-product, enhanced concentrations of K, Fe, and Zn in both leaves and fruits. The concentrations of Chla, Chlb, and carotenoids were increased in response to the BZnO or ZnO-NP treatments. Likewise, BZnO or ZnO-NP mediated an increase in activity of nitrate reductase and proline content in leaves. These treatments increased soluble phenols and phenylalanine ammonia-lyase activity. With a similar trend, the BZnO or ZnO-NP application improved the activities of catalase and peroxidase enzymes. The reinforcement in metaxylem and secondary tissues resulted from the applied supplements. This study provides comprehensive comparative evidence on how ZnO-NPs may remodel the chromatin ultrastructure and transcription program, and confer stress tolerance in crops. This study also underlines the necessity of providing integrated transcriptome and proteome data in future studies.

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The accumulation of cadmium in wheat (Triticum aestivum) as influenced by zinc oxide nanoparticles and soil moisture conditions

Cited by 134 publications

References 50 publications

Nano-ZnO-Induced Drought Tolerance Is Associated with Melatonin Synthesis and Metabolism in Maize

Nano-ZnO-Induced Drought Tolerance Is Associated with Melatonin Synthesis and Metabolism in Maize

Drought Stress Impacts on Plants and Different Approaches to Alleviate Its Adverse Effects

Zinc oxide nanoparticles mediated substantial physiological and molecular changes in tomato

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