Coactive role of zinc oxide nanoparticles and plant growth promoting rhizobacteria for mitigation of synchronized effects of heat and drought stress in wheat plants

Azmat, Ammar; Tanveer, Yashfa; Yasmin, Humaira; Hassan, Muhammad Nadeem; Shahzad, Asim; Reddy, M. S.; Ahmad, Ajaz

doi:10.1016/j.chemosphere.2022.133982

Cited by 73 publications

(35 citation statements)

References 72 publications

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“…The current field study revealed that PGPR ( Azospirillum brasilense ) and ZnO NPs improved the biological adaptations in wheat undergoing drought. Most recently, Azmat et al [ 49 ] confirmed the restoration of wheat plants’ growth and physiology from drought stress through the synergistic actions of another PGPR ( Pseudomonas sp.) and ZnO NPs under greenhouse conditions.…”

Section: Discussionmentioning

confidence: 99%

“…Improved wheat growth and drought stress resilience through better biomass, photosynthetic pigments, nutrients, soluble sugars, protein, and plant hormones (auxins, abscisic acid) have also been reported under the alone or combined application of PGPR ( Pseudomonas sp.) and ZnO NPs by Azmat et al [ 49 ]. The highest results under combined treatment (PGPR and ZnO NPs) (T 4 ) in the present study may be due to the synergism of PGPR and ZnO NPs.…”

Section: Discussionmentioning

confidence: 99%

“…245) delivered higher N, P, K, Fe, Zn, and S content in wheat (leaf, grain, and straw). Improved nutrient uptake in drought-stressed wheat was also observed under the combined application of PGPR and ZnO NPs [ 49 ]. Similarly, improved micronutrient bioavailability under the application of Fe NPs and PGPR ( Staphylococcus aureus ) on rice plants under metal stress had been reported by Alharby and Ali [ 58 ]…”

Section: Discussionmentioning

confidence: 99%

“…The combination of PGPR with Zn-Fe oxides NPs proved to be a promoter of CAT, POD, and PPO in wheat under salt stress [ 37 ]. Protection of wheat and rice plants from drought and heavy metal stress, respectively, is also evident through the co-application of PGPR and ZnO NPs, and, PGPR and Fe NPs, respectively, by producing more antioxidant enzymes (APX, CAT, SOD, and POD) and proline [ 49 , 58 ].…”

Section: Discussionmentioning

confidence: 99%

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Ameliorating Drought Effects in Wheat Using an Exclusive or Co-Applied Rhizobacteria and ZnO Nanoparticles

Muhammad

Raza

Iqbal

et al. 2022

Biology

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Drought is a major abiotic factor and affects cereal-based staple food production and reliability in developing countries such as Pakistan. To ensure a sustainable and consistent food supply, holistic production plans involving the integration of several drought mitigation approaches are required. Using a randomized complete block design strategy, we examined the drought-ameliorating characteristics of plant growth-promoting rhizobacteria (PGPR) and nanoparticles (NPs) exclusively or as a combined application (T4) through three stages (D1, D2, and D3) of wheat growth (T1, control). Our field research revealed that Azospirillum brasilense alone (T2) and zinc oxide NPs (T3) improved wheat plant water relations, chlorophyll, proline, phenolics and grain quality, yield, and their allied traits over the stressed treatments. Specifically, the best outcome was observed in the combined treatment of PGPR and ZnO NPs (T4). Interestingly, the combined treatment delivered effective drought mitigation through enhanced levels of antioxidants (15% APX, 27% POD, 35% CAT, 38% PPO and 44% SOD) over controls at the grain-filling stage (GFS, D3 × T1). The 40% improvements were recorded under the combined treatment at GFS over their respective controls. Their combined usage (PGPR and ZnO NPs) was concluded as an effective strategy for building wheat resilience under drought, especially in arid and semi-arid localities.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Ameliorating Drought Effects in Wheat Using an Exclusive or Co-Applied Rhizobacteria and ZnO Nanoparticles

Muhammad

Raza

Iqbal

et al. 2022

Biology

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“…In the present study, the activity of GR was significantly lower under drought stress, whereas the application of PGPR and biochar increased the GR activity. Likewise, another report documented the efficient use of PGPR with zinc oxide nanoparticle in increasing GR and DHAR activities in wheat plants under heat and drought stress conditions (Azmat et al, 2022). Additionally, biochar amendment with chitosan significantly enhanced GR and DHAR activities under salinity stress in jute (Corchorus olitorius L.), indicating the crucial role of biochar to enhance crop defense system under stress conditions (Hasanuzzaman et al, 2021).…”

Section: Discussionmentioning

confidence: 94%

The alleviation of drought-induced damage to growth and physio-biochemical parameters of Brassica napus L. genotypes using an integrated approach of biochar amendment and PGPR application

Lalay

Ullah

Iqbal

et al. 2022

Environ Dev Sustain

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Drought is a major abiotic stress, affecting the metabolism, growth, and productivity of plants worldwide. Therefore, this study aimed/hypothesized to investigate the ameliorative effects of biochar and rhizobacteria in drought-damaged Brassica napus L. genotypes. The plants were divided into two groups based on the drought stress employment (15 days and 30 days). Both groups were then treated with PGPR, biochar, and their co-application, and the samples were taken from shoots and roots of both genotypes. Our results revealed that the drought resulted in a substantial decline in total flavonoids, phenolics, proteins, peroxidase (POD), superoxide dismutase (SOD), glutathione reductase (GR) as well as nutrient uptake in shoots and roots of both the studied genotypes. Contrarily, sugar and glycine betaine (GB) contents increased in both shoots and roots under drought stress conditions. However, the plants with co-application of biochar and PGPR showed better improvement of nutrient uptake, leaf relative water content (RWC), and growth parameters compared to drought-stressed, control, and the plants with sole biochar and PGPR application. In addition, the co-application of PGPR and biochar produced higher levels of sugar, proteins, flavonoids, phenolic compounds, and enzymatic activities (POD, SOD, GR, and dehydroascorbate reductase (DHAR)) than those that were not treated with biochar and PGPR or treated solely. Relative to Westar genotype, the Punjab sarson showed higher drought tolerance. In conclusion, we suggest that the co-application of biochar and PGPR can be an effective strategy for overcoming the drought-induced damage in plants. Graphical Abstract

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Rosemary‐Mediated Green Synthesis of ZnO Nanoparticles and their Integration into Hydrogel Matrices: Evaluating Effects on Wheat Growth and Antibacterial Properties

Uysal,

Görkem Doğaroğlu,

Çaylali

et al. 2024

Global Challenges

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In this study, the impact of zinc oxide nanoparticles (ZnO‐NPs) generated using rosemary extract, synthesized using environmentally friendly processes and integrated into a cross‐linked polymer matrix, on growth performance of wheat is evaluated. Rosemary extract used as coating, stabilizing, and reducing agents in this green synthesis method. Fourier transform infrared spectroscopy analyses demonstrated the presence of phytochemical constituents of the plant extract that served as capping agents during the synthesis process. The nanoparticles are sprayed to the plant leaves. The effects of nanoparticles within the hydrogel on plant development are compared with the effects of nanoparticles in suspension. The percentage of seed germination is unaffected by either rosemary‐ or raw‐ZnO‐NPs; however, the root and shoot elongation are considerably impacted by the nanoparticle treatments. The threshold concentrations are determined as 3000 mg L−1 for rosemary‐ZnO‐NPs and 2000 mg L−1 for raw‐ZnO‐NPs. Additionally, antibacterial test results showed that the activity level on Escherichia coli is higher for rosemary‐ZnO‐NPs compared to raw‐ZnO‐NPs. The results of this research may provide guidance on how green synthesis methods and the use of nanoparticle‐hydrogel composites in plant breeding can be used in future agricultural applications. This can be considered an important step in terms of agricultural innovations and sustainability.

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Coactive role of zinc oxide nanoparticles and plant growth promoting rhizobacteria for mitigation of synchronized effects of heat and drought stress in wheat plants

Cited by 73 publications

References 72 publications

Ameliorating Drought Effects in Wheat Using an Exclusive or Co-Applied Rhizobacteria and ZnO Nanoparticles

Ameliorating Drought Effects in Wheat Using an Exclusive or Co-Applied Rhizobacteria and ZnO Nanoparticles

The alleviation of drought-induced damage to growth and physio-biochemical parameters of Brassica napus L. genotypes using an integrated approach of biochar amendment and PGPR application

Rosemary‐Mediated Green Synthesis of ZnO Nanoparticles and their Integration into Hydrogel Matrices: Evaluating Effects on Wheat Growth and Antibacterial Properties

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