Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 23, Issue 19, Pages 19989-20002Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-016-7170-7
Keywords
Seed priming; Metabolic; Oxidative stress; Nano-ZnO; Gene expression
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Funding
- Zhejiang Provincial Natural Science Foundation [LZ14C130002, LY15C130002]
- Special Fund for Agro-scientific Research in the Public Interest [201203052]
- Project of the Science and Technology Department of Zhejiang Province [2013C02005, 2013C32023]
- Fundamental Research Funds for the Central Universities [2015QNA6019]
- Jiangsu Collaborative Innovation Center for Modern Crop Production, People's Republic of China
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The present study was carried out to investigate the beneficial impact of seed priming with polyethylene glycol (PEG) under different concentrations of zinc oxide nanoparticles (nano-ZnO), i.e., 0, 250, 500, and 750 mg L-1 in two cultivars of Oryza sativa (Zhu Liang You 06 and Qian You No. 1). Physiological parameters were improved by priming with 30 % PEG in both cultivars under stress treatments. Seed priming with 30 % PEG improved alpha-amylase activities and total soluble sugar contents of both cultivars under nano-ZnO stress. In addition, glutathione reductase (GR) activity, reactive oxygen species (ROS) accumulation, and proline contents decreased after the priming treatment in both cultivars under different nano-ZnO concentrations. Expression of GR1, GR2, Amy2A, and Amy3A genes in shoots and roots of both cultivars increased and had higher transcription levels under the nano-ZnO stress condition. Fourier transform infrared spectroscopy (FTIR) analysis did not show any significant effects of the priming treatment on the band observed at 3400, 900, 1600, and 1000 cm(-1) corresponding to alkenyl stretch (C = C), carboxyl acid (O-H), nitrile (C = N), and aromatic (C-H), respectively, in both cultivars under nano-ZnO stress.
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