Biofabricated zinc oxide nanoparticles as an eco-friendly alternative for growth promotion and management of downy mildew of pearl millet

Nandhini, M.; Rajini, Sollepura B; Udayashankar, A. C.; Niranjana, S. R.; Lund, Ole; Shetty, H. Shekar; Prakash, H. S.

doi:10.1016/j.cropro.2019.03.015

Cited by 84 publications

(27 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Optical properties of nanosized particles is being commonly assessed by UV–visible absorption spectroscopy [ 35 ]. The absorption peak (380 nm) found in the present study obviously demonstrates the presence of ZnO NPs in the reaction mixture and it is in agreement with the earlier results of [ 33 , 36 ]. The FTIR results demonstrated a band around 3400 cm −1 , potentially resulting from OH stretching vibrations; meanwhile, the peak at 2078 cm −1 for C=H suggests a strong stretch assigned to the alkyl methylene group.…”

Section: Discussionsupporting

confidence: 93%

Biosynthesis and Characterization of ZnO Nanoparticles Using Ochradenus arabicus and Their Effect on Growth and Antioxidant Systems of Maerua oblongifolia

Shaikhaldein

Al‐Qurainy

Khan

et al. 2021

Plants

View full text Add to dashboard Cite

Zincoxide nanoparticles (ZnO NPs) are among the most produced and used nanomaterials worldwide, and in recent times these nanoparticles have also been incorporate in plant science and agricultural research. The present study was planned to synthesize ZnO NPs biologically using Ochradenus arabicus leaves and examine their effect on the morphology and physiology properties of Maerua oblongifolia cultured in vitro. ZnO NPs were characterized by UV–visible spectroscopy (UV–vis), X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy, which demonstrated hexagonal shape nanoparticles of size ranging from 10 to 50 nm. Thus, the study uncovered an efficient, eco-friendly and simple technique for biosynthesis of multifunctional ZnO NPs using Ochradenus arabicus following growth of Maerua oblongifolia shoots in different concentrations of ZnO NPs (0, 1.25, 2.5, 5, 10, or 20 mg L−1) in Murashige and Skoog medium. Remarkable increases in plant biomass, photosynthetic pigments, and total protein were recorded up to a concentration of 5 mg L−1; at the same time, the results demonstrated a significant reduction in lipid peroxidation levels with respect to control. Interestingly, the levels of proline and the antioxidant enzyme catalase (CAT), superoxide dismutase (SOD), and glutathione reductase (GR) activities were increased significantly in response to all ZnO NP treatments. These findings indicate that bioengineered ZnO NPs play a major role in accumulation of biomass and stimulating the activities of antioxidant enzymes in plant tissues. Thus, green-synthesized ZnO NPs might be of agricultural and medicinal benefit owing to their impacts on plants in vitro.

show abstract

Section: Discussionsupporting

confidence: 93%

Biosynthesis and Characterization of ZnO Nanoparticles Using Ochradenus arabicus and Their Effect on Growth and Antioxidant Systems of Maerua oblongifolia

Shaikhaldein

Al‐Qurainy

Khan

et al. 2021

Plants

View full text Add to dashboard Cite

show abstract

“…Variation in growth, metabolism, transcriptome, and proteome are, therefore, expected following Zn supplementation. In line with our results, several reports provide a clear illustration of ZnO-NP benefits in improving photosynthesis [ 15 ], nutrition [ 13 ], growth [ 14 ], secondary metabolism [ 12 , 13 , 35 ], antioxidant defense system [ 18 ], Zn bioaccumulation [ 36 ], fertility [ 16 ], and immunity [ 6 , 19 , 35 ]. However, researchers firmly believe that ZnO-NP at high doses is hazardous to crops [ 12 , 13 ].…”

Section: Discussionsupporting

confidence: 90%

Zinc oxide nanoparticles mediated substantial physiological and molecular changes in tomato

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

“…The higher registered oil production values may be related to ZnO NPs’ ability to stimulate enzymatic activity, as this has also been recorded for pearl millet in greenhouse conditions [20]. Further, Rizwan et al (2019a; 2019b) suggested that ZnO NP-treated maize and wheat had higher chlorophyll concentrations, and they indicated that the resultant greater photosynthetic effectiveness can be directly linked to the total protein, starch, oil, and dry mass contents [11,18,19].…”

Section: Resultsmentioning

confidence: 90%

“…These also included the contents of starch, oil, and total proteins [11,18,19]. The ZnO NPs further enhanced the activity of pearl millet’s defense enzymes, such as phenylalanine ammonia-lyase, lipoxygenase, polyphenol oxidase, and peroxidase in resistance to plant fungal attack [20] and exerted a positive effect on chlorophyll synthesis in both corn and wheat plants [21,22].…”

Section: Introductionmentioning

confidence: 99%

Effect of Foliar Spray Application of Zinc Oxide Nanoparticles on Quantitative, Nutritional, and Physiological Parameters of Foxtail Millet (Setaria italica L.) under Field Conditions

et al. 2019

View full text Add to dashboard Cite

It has been shown that the foliar application of inorganic nano-materials on cereal plants during their growth cycle enhances the rate of plant productivity by providing a micro-nutrient source. We therefore studied the effects of foliarly applied ZnO nanoparticles (ZnO NPs) on Setaria italica L. foxtail millet’s quantitative, nutritional, and physiological parameters. Scanning electron microscopy showed that the ZnO NPs have an average particle size under 20 nm and dominant spherically shaped morphology. Energy dispersive X-ray spectrometry then confirmed ZnO NP homogeneity, and X-ray diffraction verified their high crystalline and wurtzite-structure symmetry. Although plant height, thousand grain weight, and grain yield quantitative parameters did not differ statistically between ZnO NP-treated and untreated plants, the ZnO NP-treated plant grains had significantly higher oil and total nitrogen contents and significantly lower crop water stress index (CWSI). This highlights that the slow-releasing nano-fertilizer improves plant physiological properties and various grain nutritional parameters, and its application is therefore especially beneficial for progressive nanomaterial-based industries.

show abstract

Biofabricated zinc oxide nanoparticles as an eco-friendly alternative for growth promotion and management of downy mildew of pearl millet

Cited by 84 publications

References 46 publications

Biosynthesis and Characterization of ZnO Nanoparticles Using Ochradenus arabicus and Their Effect on Growth and Antioxidant Systems of Maerua oblongifolia

Biosynthesis and Characterization of ZnO Nanoparticles Using Ochradenus arabicus and Their Effect on Growth and Antioxidant Systems of Maerua oblongifolia

Zinc oxide nanoparticles mediated substantial physiological and molecular changes in tomato

Effect of Foliar Spray Application of Zinc Oxide Nanoparticles on Quantitative, Nutritional, and Physiological Parameters of Foxtail Millet (Setaria italica L.) under Field Conditions

Contact Info

Product

Resources

About