Journal article
Charge, Size, and Cellular Selectivity for Multiwall Carbon Nanotubes by Maize and Soybean
Environmental science & technology, Vol.49(12), pp.7379-7389
06/16/2015
DOI: 10.1021/acs.est.5b01145
PMID: 26010305
Abstract
Maize (Zea mays) and soybean (Glycine max) were used as model food-chain plants to explore vegetative uptake of differently charged multiwall carbon nanotubes (MWCNTs). Three types of MWCNTs, including neutral pristine MWCNT (p-MWCNT), positively charged MWCNT-NH2, and negatively charged MWCNT-COOH, were directly taken-up and translocated from hydroponic solution to roots, stems, and leaves of maize and soybean plants at the MWCNT concentrations ranging from 10.0 to 50.0 mg/L during 18-day exposures. MWCNTs accumulated in the xylem and phloem cells and within specific intracellular sites like the cytoplasm, cell wall, cell membrane, chloroplast, and mitochondria, which was observed by transmission electron microscopy. MWCNTs stimulated the growth of maize and inhibited the growth of soybean at the exposed doses. The cumulative transpiration of water in maize exposed to 50 mg/L of MWCNT-COOHs was almost twice as much as that in the maize control. Dry biomass of maize exposed to MWCNTs was greater than that of maize control. In addition, the uptake and translocation of these MWCNTs clearly exhibited cellular, charge, and size selectivity in maize and soybean, which could be important properties for nanotransporters. This is the first report of cellular, charge, and size selectivity on the uptake by whole food plants for three differently charged MWCNTs.
Details
- Title: Subtitle
- Charge, Size, and Cellular Selectivity for Multiwall Carbon Nanotubes by Maize and Soybean
- Creators
- Guangshu ZhaiSarah M GutowskiKatherine S WaltersBing YanJerald L Schnoor
- Resource Type
- Journal article
- Publication Details
- Environmental science & technology, Vol.49(12), pp.7379-7389
- Publisher
- American Chemical Society
- DOI
- 10.1021/acs.est.5b01145
- PMID
- 26010305
- ISSN
- 0013-936X
- eISSN
- 1520-5851
- Grant note
- DOI: 10.13039/501100002367, name: Chinese Academy of Sciences, award: XDB14030401; DOI: 10.13039/100000147, name: Division of Civil, Mechanical and Manufacturing Innovation, award: CMMI-1057906; DOI: 10.13039/501100001809, name: National Natural Science Foundation of China, award: 21137002; DOI: 10.13039/100000066, name: National Institute of Environmental Health Sciences, award: P42ES013661
- Language
- English
- Date published
- 06/16/2015
- Academic Unit
- Civil and Environmental Engineering; Occupational and Environmental Health
- Record Identifier
- 9983997430302771
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