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. 2020 May 24;10(5):1001. doi: 10.3390/nano10051001

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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TEM micrographs showing internalization and translocation of rGO-CuO NPs (NP) in tomato root cells upon exposure to 100 mg/L of NP aqueous suspensions for 1 h. (A) Control (untreated) tomato root cells showing normal architecture of cell wall (Cw), nucleus (N), integrated mitochondria (M), and vacuoles (V). (B) Tomato treated root cells showing normal cell organelles after translocation of NPs inside cellular tissue. (C) Magnified view of mitochondrion (M), microtubules (Mt), and cellular matrix of tomato treated cells. (D) Magnified view of mitochondrion (M) and cellular matrix of pepper treated. B-D panels show internalization of NPs at various sites of root cells.