Copper oxide nanoparticles and arsenic interact to alter seedling growth of rice (Oryza sativa japonica)

Chemosphere
Jing LiuGeorge P Cobb

Abstract

Arsenic (As) causes phytotoxicity to rice plants, decreases rice production and causes serious human health concerns due to rice consumption. Additional stresses may be posed to rice plants due to the increasing release into the environment by the expanding production and application of copper oxide nanoparticles (nCuO). The influence of nCuO on As uptake in and effects on rice (Oryza sativa japonica) are explored here for the first time. An 18-d factorial experiment was conducted to determine main effects of nCuO (0, 0.1, 1.0, 10, 50, and 100 mg/L) and As (0 and 10 mg/kg), and the interaction between nCuO and As on rice seed germination and seedling growth. Arsenic alone decreased the germination percentage. Both As and nCuO reduced seedling shoot and root length, and exhibited interactive effects. nCuO and As also produced an interaction effect on the number of root branches (NRB) of rice seedlings. Notably, high nCuO concentrations (50 and 100 mg/L) mitigated the negative effect of As on the NRB. Copper uptake in shoots and roots was linearly correlated with Cu concentration in the sand without As addition (R2 > 0.756). Whereas, As addition to the sand produced non-monotonic changes in Cu concentrations in shoots and roots v...Continue Reading

Citations

Apr 29, 2021·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Anayat Rasool MirShamsul Hayat

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