Alumina nanoparticles enhance growth of Lemna minor

Juhel, Guillaume; Batisse, Emeline; Hugues, Quitterie; Daly, D.J; Pelt, Frank N.A.M. van; O’Halloran, John; Jansen, Marcel A. K.

doi:10.1016/j.aquatox.2011.06.019

Cited by 108 publications

(40 citation statements)

References 36 publications

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“…This enhancement of biomass accumulation was associated with increased efficiencies in the light reactions of photosynthesis [75]. Alumina nanoparticles increased the quantum yield of photosystem II, but not the maximal quantum yield of photosystem II (Fv/Fm), perhaps suggesting that the alumina nanoparticle effect is not directly on PS II.…”

Section: Positive Effects Of Mnps On Plantsmentioning

confidence: 99%

Metal Nanoparticles and Plants / Nanocząstki Metaliczne I Rośliny

Masarovičová¹,

Kráľová²

2013

Ecological Chemistry and Engineering S

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Metal nanoparticles (MNPs) belong mostly to the engineered type of nanoparticles and have not only unique physical and chemical properties but also different biological actions. In recent years, noble MNPs and their nano-sized agglomerates (collectively referred to as nanoparticles or particles in the subsequent sections) have been the subjects of much focused research due to their unique electronic, optical, mechanical, magnetic and chemical properties that can be significantly different from those of bulk materials. To enhance their use, it is important to understand the generation, transport, deposition, and interaction of such particles. Synthesis of MNPs is based on chemical or physical synthetic procedures and by use of biological material ("green synthesis" as an environmentally benign process) including bacteria, algae and vascular plants (mainly metallophytes). In biological methods for preparation of metal nanoparticles mainly leaf reductants occurring in leaf extracts are used. MNPs can be formed also directly in living plants by reduction of the metal ions absorbed as a soluble salt, indicating that plants are a suitable vehicle for production of MNPs. These methods used for preparation of MNPs are aimed to control their size and shape. Moreover, physicochemical properties of MNPs determine their interaction with living organisms. In general, inside the cells nanoparticles might directly provoke either alterations of membranes and other cell structures or activity of protective mechanisms. Indirect effects of MNPs depend on their physical and chemical properties and may include physical restraints, solubilization of toxic nanoparticle compounds or production of reactive oxygen species. Toxic impacts of MNPs on plants is connected with chemical toxicity based on their chemical composition (eg release of toxic metal ions) and with stress or stimuli caused by the surface, size and shape of these nanoparticles. Positive effects of MNPs were observed on the following plant features: seed germination, growth of plant seedlings, stimulation of oxygen evolution rate in chloroplasts, protection of chloroplasts from aging for long-time illumination, increase of the electron transfer and photophosphorylation, biomass accumulation, activity of Rubisco, increase of quantum yield of photosystem II, root elongation, increase of chlorophyll as well as nucleic acid level and increase in the shoot/root ratio. However, it should be stressed that MNPs impact on human and environmental health remains still unclear.

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Section: Positive Effects Of Mnps On Plantsmentioning

confidence: 99%

Metal Nanoparticles and Plants / Nanocząstki Metaliczne I Rośliny

Masarovičová¹,

Kráľová²

2013

Ecological Chemistry and Engineering S

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“…is used as a model to study the toxicity of nano-TiO 2 and Zn 2+ . Current use of algae in the study of NPs toxic effects on photosynthesis seems to be a convenient method [27]. The change of photosynthetic activity affects the photosynthetic process and cellular growth, which may be indicated by fluorescence emission.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effects of Nano-Sized Titanium Dioxide and Zinc on the Photosynthetic Capacity and Survival of Anabaena sp.

Tang

Qiao

et al. 2013

IJMS

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Anabaena sp. was used to examine the toxicity of exposure to a nano-TiO2 suspension, Zn2+ solution, and mixtures of nano-TiO2 and Zn2+ suspensions. Typical chlorophyll fluorescence parameters, including effective quantum yield, photosynthetic efficiency and maximal electron transport rate, were measured by a pulse-amplitude modulated fluorometer. Nano-TiO2 particles exhibited no significant toxicity at concentrations lower than 10.0 mg/L. The 96 h concentration for the 50% maximal effect (EC50) of Zn2+ alone to Anabaena sp. was 0.38 ± 0.004 mg/L. The presence of nano-TiO2 at low concentrations (<1.0 mg/L) significantly enhanced the toxicity of Zn2+ and consequently reduced the EC50 value to 0.29 ± 0.003 mg/L. However, the toxicity of the Zn2+/TiO2 system decreased with increasing nano-TiO2 concentration because of the substantial adsorption of Zn2+ by nano-TiO2. The toxicity curve of the Zn2+/TiO2 system as a function of incremental nano-TiO2 concentrations was parabolic. The toxicity significantly increased at the initial stage, reached its maximum, and then decreased with increasing nano-TiO2 concentration. Hydrodynamic sizes, concentration of nano-TiO2 and Zn2+ loaded nano-TiO2 were the main parameters for synergistic toxicity.

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“…The aquatic environment is the ultimate destination of released NPs, and many studies have focused on the toxicity of NPs in aquatic organisms such as aquatic plants (Kumari et al, 2011;Li et al, 2013;Mousavi Kouhi et al, 2015). Among different plant species, the family Lemnaceae has found broad applications in ecotoxicological studies as model organisms (Radic et al, 2010;Torbati, 2016) and the use of duckweed in nanotoxicology investigations has been reported by some previous studies (Juhel et al, 2011;Hu et al, 2013;. Due to the simple structure and morphology, high growth rate, and small size of Lemna species, these plants have many applications in ecotoxicological studies.…”

Section: Introductionmentioning

confidence: 99%

Comparative phytotoxicity of undoped and Er-doped ZnO nanoparticles onLemna minor L.: changes in plant physiological responses

Torbati¹,

Khataee²,

Saadi³

2017

Turk J Biol

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The present study is the first research on the phytotoxicological effects of Er-doped zinc oxide nanoparticles (NPs) on duckweed (Lemna minor L.), as a model aquatic floating macrophyte. It concentrated on the comparison of the physiological effects of different concentrations of undoped and Er-doped zinc oxide NPs on L. minor. Pure and Er-doped zinc oxide samples were synthesized through a sonochemical method and their morphology and chemical composition were studied by scanning electron microscopy and energy dispersive X-ray analysis. Plant growth, photosynthetic pigment contents, and antioxidant enzyme activities were investigated as indices to assess the effects and toxicity of the NPs on L. minor. Moreover, the dissolution of Zn 2+ from the suspensions of NPs was investigated to clearly determine whether the Zn 2+ released from the NPs was the main source of their toxicity to the plant. The results showed significant changes in the physiological parameters of the plant in response to the treatments. The negative effects of treatments on the growth of L. minor, in order, were Zn 2+ >> ZnO-NPs >> EZO-NPs >> bulk-ZnO. The activity of superoxide dismutase was remarkably increased by increasing the concentration of the contaminants in the plant.

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Alumina nanoparticles enhance growth of Lemna minor

Cited by 108 publications

References 36 publications

Metal Nanoparticles and Plants / Nanocząstki Metaliczne I Rośliny

Metal Nanoparticles and Plants / Nanocząstki Metaliczne I Rośliny

Synergistic Effects of Nano-Sized Titanium Dioxide and Zinc on the Photosynthetic Capacity and Survival of Anabaena sp.

Comparative phytotoxicity of undoped and Er-doped ZnO nanoparticles onLemna minor L.: changes in plant physiological responses

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