Cerium Oxide Nanoparticles Modify the Antioxidative Stress Enzyme Activities and Macromolecule Composition in Rice Seedlings

Rico, Cyren M.; Morales, María Isabel; McCreary, Ricardo; Castillo‐Michel, Hiram; Barrios, Ana C.; Hong, Jie; Tafoya, Alejandro; Lee, Wen-Yee; Varela-Ramı́rez, Armando; Peralta-Videa, José R.; Gardea‐Torresdey, Jorge L.

doi:10.1021/es4033887

Cited by 215 publications

(108 citation statements)

References 64 publications

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“…This is quite possible, because root is primary entry point of NPs (Anjum et al 2013). Our present results are in agreement with the earlier report by Rico et al (2013). They reported that 0.125 g nCeO 2 L -1 induced the higher level of membrane damage in rice roots.…”

Section: Membrane Stability Index and Root Ion Leakagesupporting

confidence: 94%

Effects of ZnO and TiO2 nanoparticles on germination, biochemical and morphoanatomical attributes of Cicer arietinum L

Hajra

Mondal

2017

Energ. Ecol. Environ.

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With the development of nanotechnology, metal oxide nanoparticles have been applied in many industries, increasing their potential exposure level in the environment, yet their environmental safety remains poorly evaluated. Present work demonstrated the effects of ZnO and TiO 2 nanoparticles on the germination, morphoanatomical attributes and biochemistry of Cicer arietinum. The nanoparticles are used in three doses, i.e., 100, 500 and 1000 ppm along with control and each dose has three replicates. Results demonstrated that ZnO nanoparticles did not aid in the germination of seed, whereas TiO 2 nanoparticles showed positive impact on germination at 48-h observation. But at 72-h observation both the nanoparticle-treated and control seeds showed 100% germination. Morphological parameters revealed that ZnO nanoparticles have drastic negative impact on both root and shoot length, root and shoot fresh and dry biomass. On the other hand, the status of chlorophyll is almost opposite, i.e., ZnO nanoparticle-treated plants showed higher pigment content than TiO 2 nanoparticle-treated plants. From the statistical point of view, it is revealed that ZnO nanoparticle-treated plant showed significantly different results than that of TiO 2 nanoparticle-treated plants in Chl 'a' (p \ 0.001), Chl 'b' (p \ 0.001), total Chl (p \ 0.001) and carotenoid (p \ 0.001) content. Therefore, from these observations it can be concluded that ZnO nanoparticles showed positive effect on plant pigment content.Transverse sections of root clearly revealed the formation of vascular bundle, and parenchyma tissue is hampered in all the ZnO nanoparticle-treated plants. However, wellformed vascular bundles and other tissue systems are clearly visible for TiO 2 nanoparticle-treated roots. This work shows a combination of both positive and negative effects of ZnO and TiO 2 nanoparticles on a dicot plant. Present observation is very much important to understand the morphological, biochemical and anatomical alteration of plant system under the influence of ZnO and TiO 2 nanoparticles. This will help to utilize the nanoparticles in a managed way where nanoparticles with harmful effect on biological systems can be used in such a way to reduce their exposure to environment, and on the other hand, nanoparticles showing positive effect on biological systems may be used as growth enhancers or biofertilizers. Moreover, these results further strengthen our understanding of environmental safety information with respect to metal oxide nanoparticle.

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Section: Membrane Stability Index and Root Ion Leakagesupporting

confidence: 94%

Effects of ZnO and TiO2 nanoparticles on germination, biochemical and morphoanatomical attributes of Cicer arietinum L

Hajra

Mondal

2017

Energ. Ecol. Environ.

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“…The maximum activity of CAT was at 7.0 U mg −1 protein at 1.0 g beaker −1 . These results are comparable with previous studies in which rice and radish seedlings were cultured under the stress conditions of nCeO 2 and Cu 2+ (Rico et al 2013;Sun et al 2010).…”

Section: Responses Of Antioxidant Enzymes In Tomato Seedlingssupporting

confidence: 91%

“…The decrease of SOD activity at the highest dosages (in contrast to the control) suggested that SOD was out of self-adjustment to the stress of the contaminants in the biochar, resulting in the inefficient removal of superoxide. In addition, the results on SOD activity were comparable with previous investigations in which plants were cultured under the stress conditions of heavy metals and PHAs (Rico et al 2013).…”

Section: Responses Of Antioxidant Enzymes In Tomato Seedlingssupporting

confidence: 87%

Phytotoxicity assessment on corn stover biochar, derived from fast pyrolysis, based on seed germination, early growth, and potential plant cell damage

Shen

Guo

et al. 2015

Environ Sci Pollut Res

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The potential phytotoxicity of water extractable toxicants in a typical corn stover biochar, the product of fast pyrolysis, was investigated using an aqueous biochar extract on a soil-less bioassay with tomato plants. The biochar dosage of 0.0-16.0 g beaker(-1) resulted in an inverted U-shaped dose-response relationship between biochar doasage and seed germination/seedling growth. This indicated that tomato growth was slightly stimulated by low dosages of biochar and inhibited with higher dosages of biochar. Additionally, antioxidant enzyme activities in the roots and leaves were enhanced at lower dosages, but rapidly decreased with higher dosages of biochar. With the increased dosages of biochar, the malondialdehyde content in the roots and leaves increased, in addition with the observed morphology of necrotic root cells, suggesting that serious damage to tomato seedlings occurred. EC50 of root length inhibition occurred with biochar dosages of 9.2 g beaker(-1) (3.5th day) and 16.7 g beaker(-1) (11th day) (equivalent to 82.8 and 150.3 t ha(-1), respectively), which implied that toxicity to the early growth of tomato can potentially be alleviated as the plant grows.

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“…Previous work on non-GM plants reported negative, positive, and/or no effect of different NPs on seed germination, root elongation, and other plant growth performance indicators. ENPs can influence nutrient uptake (Larue et al 2012;Trujillo-Reyes et al 2013), bioavailability (Lee et al 2008;Marusenko et al 2013), biotransformation (Zhang et al 2012(Zhang et al , 2013, antioxidant enzyme activity (Cui et al 2014;Rico et al 2013), and other physiological biomarkers in conventional plants. Fe 2 O 3 NPs specifically have been shown to have key effects on plants.…”

Section: Introductionmentioning

confidence: 99%

Response difference of transgenic and conventional rice (Oryza sativa) to nanoparticles (γFe2O3)

Gui

Deng

Rui

et al. 2015

Environ Sci Pollut Res

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Nanoparticles (NPs) are an increasingly common contaminant in agro-environments, and their potential effect on genetically modified (GM) crops has been largely unexplored. GM crop exposure to NPs is likely to increase as both technologies develop. To better understand the implications of nanoparticles on GM plants in agriculture, we performed a glasshouse study to quantify the uptake of Fe2O3 NPs on transgenic and non-transgenic rice plants. We measured nutrient concentrations, biomass, enzyme activity, and the concentration of two phytohormones, abscisic acid (ABA) and indole-3-acetic acid (IAA), and malondialdehyde (MDA). Root phytohormone inhibition was positively correlated with Fe2O3 NP concentrations, indicating that Fe2O3 had a significant influence on the production of these hormones. The activities of antioxidant enzymes were significantly higher as a factor of low Fe2O3 NP treatment concentration and significantly lower at high NP concentrations, but only among transgenic plants. There was also a positive correlation between the treatment concentration of Fe2O3 and iron accumulation, and the magnitude of this effect was greatest among non-transgenic plants. The differences in root phytohormone production and antioxidant enzyme activity between transgenic and non-transgenic rice plants in vivo suggests that GM crops may react to NP exposure differently than conventional crops. It is the first study of NPs that may have an impact on GM crops, and a realistic significance for food security and food safety.

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Cerium Oxide Nanoparticles Modify the Antioxidative Stress Enzyme Activities and Macromolecule Composition in Rice Seedlings

Cited by 215 publications

References 64 publications

Effects of ZnO and TiO2 nanoparticles on germination, biochemical and morphoanatomical attributes of Cicer arietinum L

Effects of ZnO and TiO2 nanoparticles on germination, biochemical and morphoanatomical attributes of Cicer arietinum L

Phytotoxicity assessment on corn stover biochar, derived from fast pyrolysis, based on seed germination, early growth, and potential plant cell damage

Response difference of transgenic and conventional rice (Oryza sativa) to nanoparticles (γFe2O3)

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