Phytotoxicity of multi-walled carbon nanotubes assessed by selected plant species in the seedling stage

Begum, Parvin; Ikhtiari, Refi; Fugetsu, Bunshi; Matsuoka, Makoto; Akasaka, Tsukasa; Watari, Fumio

doi:10.1016/j.apsusc.2012.03.028

Cited by 119 publications

(50 citation statements)

References 18 publications

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“…Watersoluble MWCNT (wsMWCNT) had a significant effect on the growth of Cicer arietinum L. plants (Tripathi et al 2011). The germination rate of corn and rye plants treated with MWCNT was reduced, while the root length was increased (Begum et al 2012(Begum et al , 2014. In the present study, in the concentration of 2 µg · ml the germination percentage increased, quite similar to the control, and the radicle length, in comparison with the control, increased as well.…”

Section: Discussionsupporting

confidence: 62%

Investigating of a wide range of concentrations of multi-walled carbon nanotubes on germination and growth of castor seeds (Ricinus communis L.)

Fathi¹,

Nejad²,

Mahmoodzadeh³

et al. 2017

Journal of Plant Protection Research

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Carbon nanotubes act as regulators of plant germination and growth and are able to change the morphology and physiology of plant cells. The castor plant (Ricinus communis L.) belongs to the Euphorbiaceae family and is a very important medicinal plant. The aim of this study was to investigate the effect of 10 different concentrations of multi-walled carbon nanotubes (MWCNTs) (2, 5, 10, 20, 50, 75, 100, 125, 250 and 500 µg · ml , respectively, and the highest germination rate (53.3%) and the mean germination time (4.6 days) was seen in the concentration of 75 µg · ml -1 . However, no statistically significant differences were found between the different concentrations in any of the germination factors. In the concentration of 100 µg · ml -1 , there was a significant increase in the seedling vigor index I (400) when compared with the concentrations of 5 and 10 µg · ml -1 . The maximum seedling vigor index II (11.3) was found in the concentration of 100 µg · ml -1 and was significantly different from the control and all applied concentrations. The length of radicle in the 100 and 125 µg · ml -1 had a significant increase when compared with the control and the concentrations of 10 and 50 µg · ml -1 . The maximum seedling length (4.6 cm) was seen in the concentration of 100 µg · ml -1 where there was a significant increase with 10 µg · ml -1 . Moreover, in the 100 µg · ml -1 concentration, the largest number of rootlets (8.6) was seen and when compared with the control and concentrations of 5, 10 and 50 µg · ml -1 , there was a statistically significant increase. The maximum wet weight (0.3 g) and dry weight (0.1 g) of seedlings were obtained in the concentration of 100 µg · ml -1 and when compared with the control, there was a significant increase. It was found that in all factors related to the growth of seedlings, the concentrations of 10 and 50 MWCNTs had an inhibitory effect on the response index. The MWCNTs concentration of 100 µg · ml -1 was considered as the optimum concentration in the growth stage of castor seedlings.

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Section: Discussionsupporting

confidence: 62%

Investigating of a wide range of concentrations of multi-walled carbon nanotubes on germination and growth of castor seeds (Ricinus communis L.)

Fathi¹,

Nejad²,

Mahmoodzadeh³

et al. 2017

Journal of Plant Protection Research

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“…We conducted a preliminary screening to determine CNTs' phytotoxicity toward seven plant species (chili, cucumber, lady's finger, lettuce, red spinach, rice, and soybean) [31]. The vegetative plant red spinach was selected for further study, since its roots and leaves both displayed toxic symptoms and its small seed size results in a relatively large surface area to volume ratio, which is conductive to higher sensitivity to toxicants [32].…”

Section: Introductionmentioning

confidence: 99%

Phytotoxicity of multi-walled carbon nanotubes on red spinach (Amaranthus tricolor L) and the role of ascorbic acid as an antioxidant

Begum

Fugetsu

2012

Journal of Hazardous Materials

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173

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Carbon nanotubes (CNTs) are a novel nanomaterial with wide potential applications; however the adverse effects of CNTs following environmental exposure have recently received significant attention. Herein, we explore the systemic toxicity and potential influence of 0-1000 mg L −1 the multi-walled CNTs on red spinach. CNTs exposed plants exhibited growth inhibition and cell death after 15 days of hydroponic culture.CNTs had adverse effects on root and leaf morphology, as observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Raman spectroscopy detected CNTs in leaves. Biomarkers of nanoparticle toxicity, reactive oxygen species (ROS), and cell damage in the red spinach were greatly increased 15 days post-exposure to CNTs. These effects were reversed when CNTs were supplemented with ascorbic acid (AsA), suggesting a role of ROS in the CNT-induced toxicity and that the primary mechanism of CNTs' toxicity is oxidative stress.

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“…More efficient water uptake induced by the CNT has been implied as the growth stimulator (Khodakovskaya et al 2009;Villagarcia et al 2012;Mondal et al 2011;Tripathi et al 2011). On the other hand there exist contradictory reports that show the toxicity of CNTs to the growth of a number of different plants (Begum et al 2012;Lin and Xing 2007). MWCNT reduced the root fresh weights (FW) of rice and cucumber seedlings while the root lengths (RL) varied in a nonorderly manner with MWCNT concentration (rice) or decreased (cucumber) (Begum et al 2012); the germination rate of maize and rye grass decreased with 2,000 mg/l of MWCNT but their RLs increased (Lin and Xing 2007); MWCNT increased the FW and RLs of wheat seedlings but had no effect on seed germination and shoot lengths (SL) (Wang et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Too vigorous an ultrasonication has been supposed damage the CNT (Vaisman et al 2006). In yet another variation, ultrasonication had been replaced by bead milling (Begum et al 2012). Pristine MWCNTs where used were pure, but were individualistic in type because they had been fabricated in the researchers' own laboratories with different techniques, resulting in MWCNTs with different morphologies or remnant functional groups.…”

Section: Introductionmentioning

confidence: 99%

“…The dependence of seedling growth on the first three factors is well known in plant physiology. An assortment of media have been used in the aforesaid works-wet filter paper (Mondal et al 2011;Lin and Xing 2007;Wang et al 2012), agar with MS nutrients (Khodakovskaya et al 2009;Villagarcia et al 2012) and hydroponics with Hoagland's nutrients (Begum et al 2012) or without (Tripathi et al 2011). Pristine MWCNTs are hydrophobic and form aggregates in aqueous media that reduce their aspect ratio and hence their effectiveness.…”

Section: Introductionmentioning

confidence: 99%

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Interfacing carbon nanotubes (CNT) with plants: enhancement of growth, water and ionic nutrient uptake in maize (Zea mays) and implications for nanoagriculture

et al. 2013

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The application of nano-biotechnology to cropscience/agriculture ('nanoagriculture') is a recent development. While carbon nanotubes (CNTs) have been shown to dramatically improve germination of some comestible plants, deficiencies in consistency of behavior and reproducibility arise, partially from the variability of the CNTs used. In this work, factory-synthesized multi-walled-CNTs (MWCNTs) of quality-controlled specifications were seen to enhance the germinative growth of maize seedlings at low concentrations but depress it at higher concentrations. Growth enhancement principally arose through improved water delivery by the MWCNT. Polarized EDXRF spectrometry showed that MWCNTs affect mineral nutrient supply to the seedling through the action of the mutually opposing forces of inflow with water and retention in the medium by the ion-CNT transient-dipole interaction. The effect varied with ion type and MWCNT concentration.

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Phytotoxicity of multi-walled carbon nanotubes assessed by selected plant species in the seedling stage

Cited by 119 publications

References 18 publications

Investigating of a wide range of concentrations of multi-walled carbon nanotubes on germination and growth of castor seeds (Ricinus communis L.)

Investigating of a wide range of concentrations of multi-walled carbon nanotubes on germination and growth of castor seeds (Ricinus communis L.)

Phytotoxicity of multi-walled carbon nanotubes on red spinach (Amaranthus tricolor L) and the role of ascorbic acid as an antioxidant

Interfacing carbon nanotubes (CNT) with plants: enhancement of growth, water and ionic nutrient uptake in maize (Zea mays) and implications for nanoagriculture

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