Carbon Nanotubes Are Able To Penetrate Plant Seed Coat and Dramatically Affect Seed Germination and Plant Growth

Khodakovskaya, Mariya; Dervishi, Enkeleda; Mahmood, Meena; Xu, Yang; Li, Zhongrui; Watanabe, Fumiya; Biris, Alexandru S.

doi:10.1021/nn900887m

Cited by 885 publications

(496 citation statements)

References 29 publications

Supporting

Mentioning

440

Contrasting

Unclassified

Order By: Relevance

“…8i), which may cause damage. The root diameters were increased in the presence of CNTs, possibly as a result of water absorbtion by CNTs [14]. The lateral roots were developed to the mitosis zone (Fig.…”

Section: Fig 7 Herementioning

confidence: 94%

“…9. here Carbon nanomaterials can penetrate the cell wall and cell membrane of intact plant cells [14] and [15]. Based on the assumption that nanotubes can penetrate the root and then translocate into the leaf, TEM and Raman spectroscopy was used to detect CNTs inside the roots and leaves of the treated plants respectively.…”

Section: Morphological Observations and Localization Of Cnts Inside Tmentioning

confidence: 99%

“…The unique Raman spectrum of the CNTs and their strong scattering properties provide an exceedingly powerful tool for detecting graphitic materials, such as CNTs, inside a biological system [14]. The characteristic bands for CNTs are observed in the Raman spectra at 1330 cm −1 , 1590 cm −1 , and 2640 cm −1 due to the D-band, G′-band, and 2D-band, respectively (Fig.…”

Section: Morphological Observations and Localization Of Cnts Inside Tmentioning

confidence: 99%

“…Plants and plant cells showed high tendencies to accumulate CNTs [14,15], making plants an important link in the pathway by which CNTs enter the food chain and 4 biological cycles [16]. Torney and co-wokers [17] demonstrated that CNTs can assist the delivery of biological molecules into plant cells.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

169

View full text Add to dashboard Cite

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.

show abstract

Section: Fig 7 Herementioning

confidence: 94%

Section: Morphological Observations and Localization Of Cnts Inside Tmentioning

confidence: 99%

Section: Morphological Observations and Localization Of Cnts Inside Tmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

169

View full text Add to dashboard Cite

show abstract

“…23 Estudos também têm demonstrado que NTCs podem afetar o crescimento de plantas, atuando como um eventual adubo. 24,25 Na área biomédica os NTCs são estudados visando à produção ou melhoria de biomateriais, tais como próteses para artroplastia, placas ou parafusos para fixação de fraturas, suportes para a regeneração óssea, sistemas de entrega de drogas, sensores químicos e biológi-cos, suporte para enzimas em biorreatores, entre outros. Os NTCs se mostram bastante eficientes como vetores de agentes de contraste para imagens por ressonância.…”

Section: Figura 1 Fotografia De Materials Particulado Contendo Nanotuunclassified

Citotoxicidade e genotoxicidade de nanotubos de carbon

Franchi¹,

Santos²,

Matsubara³

et al. 2012

Quím. Nova

View full text Add to dashboard Cite

Recebido em 2/5/11; aceito em 6/9/11; publicado na web em 8/11/11 CYTOTOXICITY AND GENOTOXICITY OF CARBON NANOTUBES. There are many controversies regarding the cyto-and genotoxicity of carbon nanotubes (CNTs). In this work, we discuss that many of the incongruous arguments are probably associated with the poor physical-chemical characterization of the CNT samples used in many publications. This manuscript presents examples of carbon nanostructures observed under high resolution electron microscopy that can be found in typical CNT samples, and shows which roles in cyto-and genotoxicity need to be better investigated. Issues concerning chemical treatment are addressed and examples of misunderstandings that can occur during the studies of cyto-and genotoxicity of CNT samples are given.Keywords: cell viability; DNA damage; carbon nanotube samples. INTRODUÇÃOA ideia de nanotecnologia como uma ciência de manipulação molecular ou de escala nanométrica sempre foi um fascínio para muitos pesquisadores. Feynman em 1959 e Drexler em 1986 já chamavam a atenção da comunidade científica com relação à nanotecnologia. 1,2 Com os avanços da microscopia e de outras técnicas, a nanotecnologia se tornou nos últimos 10 anos uma das áreas mais importantes da ciência e da inovação tecnológica com projeções comerciais estimadas para 2015 em um trilhão de dólares. 3,4 Nesse contexto a Nanotoxicologia desempenha um papel importante, pois investiga os efeitos dos nanodispositivos e nanoestruturas em sistemas biológicos. 5 A avaliação toxicológica de partículas e fibras em escala nanométrica 6 contribui para uma série de questões ligadas à utilização de nanomateriais em produtos comerciais. Sendo assim, o entendimento dos mecanismos de cito-e genotoxicidade de um dado nanomaterial é fundamental para a definição de seu impacto ambiental e de estratégias de proteção aos trabalhadores e consumidores. 7 O presente artigo apresenta uma revisão de estudos realizados sobre a eventual indução de danos às células e ao DNA (citotoxicidade e genotoxicidade, respectivamente) por nanotubos de carbono (NTCs), conduzidos em experimentos in vitro. Na literatura existente é possível detectar várias controvérsias e questões que ainda precisam ser esclarecidas já que algumas dessas nanoestruturas se apresentam biocompatíveis. Recentes estudos demonstraram, por exemplo, que a enzima mieloperoxidase presente em neutrófilos humanos é capaz de degradar nanotubos de carbono de parede simples (NTCPS) e que os produtos da biodegradação dos NTCs não induziram inflamação quando expostos aos pulmões de camundongo. [8][9][10][11][12] Embora haja um conflito sobre o mérito do descobrimento dos NTCs, 13 o fato é que esses são um dos nanomateriais mais fascinantes e estudados nas últimas duas décadas. Um NTCPS pode ser descrito basicamente como uma folha de grafeno enrolada e fechada em cada extremidade por metade de um fulereno. Quando várias folhas de grafeno constituem a parede do tubo os mesmos são classificados como NTCs de parede múltiplas (NTCPM). 14 Os NTCs aprese...

show abstract

Engineered nanoparticles (ENPs): applications, risk assessment, and risk management in the agriculture and food sectors

Ovissipour

Roopesh

Rasco

et al. 2014

Food Chemical Hazard Detection

View full text Add to dashboard Cite

Carbon Nanotubes Are Able To Penetrate Plant Seed Coat and Dramatically Affect Seed Germination and Plant Growth

Cited by 885 publications

References 29 publications

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

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

Citotoxicidade e genotoxicidade de nanotubos de carbon

Engineered nanoparticles (ENPs): applications, risk assessment, and risk management in the agriculture and food sectors

Contact Info

Product

Resources

About