Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 14, Issue 8, Pages 6089-6094Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2014.8853
Keywords
Gold Nanorods; Phytotoxicity; Oxidant Stress; Watermelon
Categories
Funding
- EU-FP7 Project [MARINA 263215]
- Major Project of National Social Science Fund [12ZD117]
- National Natural Science Foundation of China [31301735]
- Open Fund from Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety
- Chinese Academy of Sciences
- Fundamental Research Funds for the Central Universities [WUT2013-Ia-013]
- Youth Chenguang Project, Wuhan Science and Technology Bureau [201271031391]
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The objective of the present study was to evaluate the phytotoxicity and oxidant stress of the gold nanorods toward watermelon, and hence give a quantitative risk assessment of both seeds and plants phase. The seed germination, the activity of antioxidant enzymes, and the contents of soluble protein and malondialdehyde (MDA) have been measured while the plant roots were observed by transmission electron microscopy (TEM). It was found that the gold nanorods significantly promoted the root elongation. Furthermore, the results on the enzymes activities of plant indicated that oxidative stress happened in the plant treated with gold nanorods. However, the gold nanorods resulted in the phytotoxicity toward plant especially at high concentration. The TEM images of the plant roots with and without the treatment of gold nanorods showed the significant different size of starch granules. In conclusion, significant physiological changes of plant occurred after treatment with the gold nanorods.
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