Tags

Type your tag names separated by a space and hit enter

Xylem- and phloem-based transport of CuO nanoparticles in maize (Zea mays L.).
Environ Sci Technol. 2012 Apr 17; 46(8):4434-41.ES

Abstract

This work reports on the toxicity of CuO nanoparticles (NPs) to maize (Zea mays L.) and their transport and redistribution in the plant. CuO NPs (100 mg L(-1)) had no effect on germination, but inhibited the growth of maize seedlings; in comparison the dissolved Cu(2+) ions and CuO bulk particles had no obvious effect on maize growth. CuO NPs were present in xylem sap as examined by transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS), showing that CuO NPs were transported from roots to shoots via xylem. Split-root experiments and high-resolution TEM observation further showed that CuO NPs could translocate from shoots back to roots via phloem. During this translocation, CuO NPs could be reduced from Cu (II) to Cu (I). To our knowledge, this is the first report of root-shoot-root redistribution of CuO NPs within maize. The current study provides direct evidence for the bioaccumulation and biotransformation of CuO NPs (20-40 nm) in maize, which has significant implications on the potential risk of NPs and food safety.

Authors+Show Affiliations

College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, People's Republic of China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

22435775

Citation

Wang, Zhenyu, et al. "Xylem- and Phloem-based Transport of CuO Nanoparticles in Maize (Zea Mays L.)." Environmental Science & Technology, vol. 46, no. 8, 2012, pp. 4434-41.
Wang Z, Xie X, Zhao J, et al. Xylem- and phloem-based transport of CuO nanoparticles in maize (Zea mays L.). Environ Sci Technol. 2012;46(8):4434-41.
Wang, Z., Xie, X., Zhao, J., Liu, X., Feng, W., White, J. C., & Xing, B. (2012). Xylem- and phloem-based transport of CuO nanoparticles in maize (Zea mays L.). Environmental Science & Technology, 46(8), 4434-41. https://doi.org/10.1021/es204212z
Wang Z, et al. Xylem- and Phloem-based Transport of CuO Nanoparticles in Maize (Zea Mays L.). Environ Sci Technol. 2012 Apr 17;46(8):4434-41. PubMed PMID: 22435775.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Xylem- and phloem-based transport of CuO nanoparticles in maize (Zea mays L.). AU - Wang,Zhenyu, AU - Xie,Xiaoyan, AU - Zhao,Jian, AU - Liu,Xiaoyun, AU - Feng,Wenqiang, AU - White,Jason C, AU - Xing,Baoshan, Y1 - 2012/04/04/ PY - 2012/3/23/entrez PY - 2012/3/23/pubmed PY - 2012/8/8/medline SP - 4434 EP - 41 JF - Environmental science & technology JO - Environ Sci Technol VL - 46 IS - 8 N2 - This work reports on the toxicity of CuO nanoparticles (NPs) to maize (Zea mays L.) and their transport and redistribution in the plant. CuO NPs (100 mg L(-1)) had no effect on germination, but inhibited the growth of maize seedlings; in comparison the dissolved Cu(2+) ions and CuO bulk particles had no obvious effect on maize growth. CuO NPs were present in xylem sap as examined by transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS), showing that CuO NPs were transported from roots to shoots via xylem. Split-root experiments and high-resolution TEM observation further showed that CuO NPs could translocate from shoots back to roots via phloem. During this translocation, CuO NPs could be reduced from Cu (II) to Cu (I). To our knowledge, this is the first report of root-shoot-root redistribution of CuO NPs within maize. The current study provides direct evidence for the bioaccumulation and biotransformation of CuO NPs (20-40 nm) in maize, which has significant implications on the potential risk of NPs and food safety. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/22435775/Xylem__and_phloem_based_transport_of_CuO_nanoparticles_in_maize__Zea_mays_L___ DB - PRIME DP - Unbound Medicine ER -