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Title: Comparative study of plant responses to carbon-based nanomaterials with different morphologies

The relationship between the morphology of carbon-based nanomaterials (CBNs) and the specific response of plants exposed to CBNs has not been studied systematically. Here, we prove that CBNs with different morphologies can activate cell growth, germination, and plant growth. A tobacco cell culture growth was found to increase by 22%–46% when CBNs such as helical multi-wall carbon nanotubes (MWCNTs), few-layered graphene, long MWCNTs, and short MWCNTs were added to the growth medium at a concentration of 50 μg ml –1. The germination of exposed tomato seeds, as well as the growth of exposed tomato seedlings, were significantly enhanced by the addition of all tested CBNs. The presence of CBNs inside exposed seeds was confirmed by transmission electron microscopy and Raman spectroscopy. The effects of helical MWCNTs on gene expression in tomato seeds and seedlings were investigated by microarray technology and real time-PCR. Helical MWCNTs affected a number of genes involved in cellular and metabolic processes and response to stress factors. It was shown that the expression of the tomato water channel gene in tomato seeds exposed to helical MWCNTs was upregulated. Furthermore, these established findings demonstrate that CBNs with different morphologies can cause the same biological effects and share similarmore » mechanisms in planta.« less
 [1] ;  [2] ;  [3] ;  [3] ;  [4]
  1. Univ. of Arkansas at Little Rock, Little Rock, AR (United States)
  2. Univ. of Arkansas at Little Rock, Little Rock, AR (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Univ. of Arkansas at Little Rock, Little Rock, AR (United States); Far-Eastern Branch of Russian Academy of Sciences, Vladivostok (Russia)
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Additional Journal Information:
Journal Volume: 27; Journal Issue: 26; Journal ID: ISSN 0957-4484
IOP Publishing
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org:
Country of Publication:
United States
36 MATERIALS SCIENCE; carbon-based nanomaterials; properties of carbon nanomaterials; germination; uptake of carbon nanotubes; aquaporin gene expression; tomato seeds
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