Phytotoxicity and bioaccumulation of zinc oxide nanoparticles in rice (Oryza sativa L.)

Jing, Chen; Dou, Runzhi; Yang, Zhongzhou; You, Tingting; Gao, Xiang; Wang, Li

doi:10.1016/j.plaphy.2018.08.019

Cited by 103 publications

(66 citation statements)

References 56 publications

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“…To remedy this deficiency inorganic zinc fertilizers sources are increasingly used, with a focus on evaluating the efficiency of different application forms of the insoluble ZnO source in nanometer scale for diverse cultures. Some research shows positive effects of the ZnO NP application for plants [1,10,14,29,30], although other authors report negative effects [31,32]. This duality of reported responses is mainly related to the amounts of ZnO NP applied, since there is a narrow line between the concentration that will promote beneficial effects and the concentration leading to a toxic effect for the plants.…”

Section: Discussionmentioning

confidence: 99%

Initial Development of Corn Seedlings after Seed Priming with Nanoscale Synthetic Zinc Oxide

et al. 2020

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Nanofertilizers are increasingly explored for sustainable micronutrient delivery in agriculture. Pre-treating seeds with nanofertilizers prior to planting (i.e., seed priming) reduces concerns about nanoparticle (NP) fertilizer non-target dispersion; however, priming formulations and concentrations must be carefully selected to avoid germination inhibition and toxicity. Here we investigate changes in corn seed germination and seedling development after seed priming with ZnO NPs, ZnO bulk and ZnCl2. To evaluate the effects sterile seeds were immersed in priming solutions of 0, 20, 40, 80, 160 mg L−1 Zn for the three Zn sources. Following an 8 h priming the seeds were evaluated for germination and vigor for 5 days on germination paper. Root and shoot lengths were measured as well as fresh and dry biomass. Compared to the control, the ZnO NP and ZnCl2 seed priming promoted beneficial effects. ZnO NP seed-priming exhibited a concentration dependent profile in improving seedling growth, with greatest benefit around 80 mg L−1, providing 17%, 25% and 12% higher values than control for germination, root length, and dry biomass production, respectively. In contrast, seeds primed with bulk ZnO did not differ from the control. These findings support NP-seed priming as an alternative to delivery of essential micronutrients, such as zinc, to corn seedlings.

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Section: Discussionmentioning

confidence: 99%

Initial Development of Corn Seedlings after Seed Priming with Nanoscale Synthetic Zinc Oxide

et al. 2020

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“…The ACT2 (actin-2, LOC4349087) [3] of rice plants was used as an internal reference. The primer pairs used in qRT-PCR analysis of CHLD, CHLG, CHLM, and CAO have been detailed in a previous study [33]. The qRT-PCR experiment was carried out with an Applied Biosystems 7500 Real-Time PCR System (Thermo Fisher Scientific, Waltham, MA, USA).…”

Section: Quantitative Real-time Pcr (Qrt-pcr) Of the Chlorophyll Syntmentioning

confidence: 99%

“…The carotenoid content decreased significantly by 24.1%, 52.5%, and 59.7% in rice leaves exposed to 62.5, 125, and 250 mg/L CuO NPs, respectively (p < 0.05) ( Figure 4E). The photosynthetic yield and the content of Chl-a and Chl-b are considered important indicators in assessing the phytotoxicity of NPs, e.g., Ag NPs [52] and ZnO NPs [1,33]. Shaw et al also reported that Hordeum vulgare L. with exposure to 0.5, 1.0, and 1.5 mm CuO NPs for 20 days had significantly decreased chlorophyll content [28].…”

Section: Chlorophyll and Carotenoid Content Of Rice Leavesmentioning

confidence: 99%

“…Res. Public Health 2020, 17, x 7 of 11 phytotoxicity of NPs, e.g., Ag NPs [52] and ZnO NPs [1,33]. Shaw et al also reported that Hordeum vulgare L. with exposure to 0.5, 1.0, and 1.5 mM CuO NPs for 20 days had significantly decreased chlorophyll content [28].…”

Section: Chlorophyll and Carotenoid Content Of Rice Leavesmentioning

confidence: 99%

“…CuO NPs were also found to inhibit root elongation of freshly germinated maize and rice seedlings, even at a low concentration of 25 mg/L [32]. The phytotoxicity of CuO NPs is usually assessed by measuring the phenotypic indexes of plant growth and development, e.g., germination rates, root elongation, and biomass accumulation [9,33,34]. However, compared to other nanoparticles, published papers focusing on the physiological and molecular changes caused by CuO NPs are still limited.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Copper Oxide Nanoparticles on the Growth of Rice (Oryza Sativa L.) Seedlings and the Relevant Physiological Responses

Yang

Xiao

Jiao

et al. 2020

IJERPH

Self Cite

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Rice (Oryza sativa L.), a major staple food for billions of people, was assessed for its phytotoxicity of copper oxide nanoparticle (CuO NPs, size < 50 nm). Under hydroponic condition, seven days of exposure to 62.5, 125, and 250 mg/L CuO NPs significantly suppressed the growth rate of rice seedlings compared to both the control and the treatment of supernatant from 250 mg/L CuO NP suspensions. In addition, physiological indexes associated with antioxidants, including membrane damage and antioxidant enzyme activity, were also detected. Treatment with 250 mg/L CuO NPs significantly increased malondialdehyde (MDA) content and electrical conductivity of rice shoots by 83.4% and 67.0%, respectively. The activity of both catalase and superoxide dismutase decreased in rice leaves treated with CuO NPs at the concentration of 250 mg/L, while the activity of the superoxide dismutase significantly increased by 1.66 times in rice roots exposed to 125 mg/L CuO NPs. The chlorophyll, including chlorophyll a and chlorophyll b, and carotenoid content in rice leaves decreased with CuO NP exposure. Finally, to explain potential molecular mechanisms of chlorophyll variations, the expression of four related genes, namely, Magnesium chelatase D subunit, Chlorophyll synthase, Magnesium-protoporphyrin IX methyltransferase, and Chlorophyllide a oxygenase, were quantified by qRT-PCR. Overall, CuO NPs, especially at 250 mg/L concentration, could affect the growth and development of rice seedlings, probably through oxidative damage and disturbance of chlorophyll and carotenoid synthesis.

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Cellulose Nanocrystals are a Renewable and Biocompatible Nanocarrier of Agrochemicals Directly to Plant Cells

Vinzant,

Clouse,

Amit

et al. 2023

Advanced Sustainable Systems

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More sustainable agricultural practices are critical to meeting humanity's food needs while minimizing adverse environmental impacts. Engineered nanomaterials used as nanocarriers promise to reduce the volume of agrochemicals required for crop production but concerns about nanocontamination of agricultural products necessitate the discovery of naturally occurring alternatives. Here, plant‐derived cellulose nanocrystals (CNC) as a “green” alternative to man‐made nanomaterials for the economical delivery of agrochemicals to plants are suggested. Using confocal microscopy and fluorescently labeled CNC, it is demonstrated that CNC can successfully penetrate the plant cell wall and enter cells without causing any negative effects on the overall plant phenotype, genome, and metabolome. The efficiency of CNC to deliver chemicals is demonstrated through in vitro tests involving CNC covalently conjugated with 2,4‐dichlorophenoxyacetic acid (2,4‐D). Plant cell culture experiments confirmed that CNC can be used as a 2,4‐D nanocarrier and reduces the volume of plant growth regulators needed to cultivate plant cells. This work creates a new platform for cyclical agricultural practices where CNC extracted from agricultural waste can be used for the direct delivery of agrochemicals to crops, thereby reducing the environmental burden created by both agricultural waste and excess herbicides.

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Phytotoxicity and bioaccumulation of zinc oxide nanoparticles in rice (Oryza sativa L.)

Cited by 103 publications

References 56 publications

Initial Development of Corn Seedlings after Seed Priming with Nanoscale Synthetic Zinc Oxide

Initial Development of Corn Seedlings after Seed Priming with Nanoscale Synthetic Zinc Oxide

Effects of Copper Oxide Nanoparticles on the Growth of Rice (Oryza Sativa L.) Seedlings and the Relevant Physiological Responses

Cellulose Nanocrystals are a Renewable and Biocompatible Nanocarrier of Agrochemicals Directly to Plant Cells

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