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Phytotoxicity and Transport of Gallium (Ga) in Rice Seedlings for 2-Day of Exposure

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Abstract

Hydroponic experiments were conducted with rice seedlings to investigate the accumulation and phytotoxicity of gallium nitrate. A linear decrease in relative growth rate, transpiration rate and water use efficiency was observed in rice seedlings with increasing Ga concentrations. However, inhibition of these selected parameters was noted different at different Ga treatments. Relative growth rate was more sensitive towards Ga treatments. Phyto-transport of Ga was apparent, but recovery of Ga in different parts of rice seedlings varied significantly: roots were dominant site for Ga accumulation. The total accumulation rates of Ga were positively correlated to Ga concentrations. Results indicated that the addition of Ga did not cause deleterious effects on plant physiological functions over a 2-day exposure period. Large amounts of Ga were removed from the hydroponic solution through rice seedlings. Accumulation of Ga in plant tissues resulted in growth inhibition of rice seedlings.

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Acknowledgments

This work was financially supported by the research foundations from Guilin University of Technology (Grant No.: GUTRC2011007) and The Guangxi Talent Highland for Hazardous Waste Disposal Industrialization. Thanks to Mr. Dong-Ming Yue for his technical assistance.

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The authors declare that they have no conflict of interest.

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    Authors and Affiliations

    1. The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, People’s Republic of China

      Xiao-Zhang Yu, Xing-Hui Feng & Yu-Xi Feng

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    1. Xiao-Zhang Yu
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    2. Xing-Hui Feng
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    3. Yu-Xi Feng
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    Correspondence to Xiao-Zhang Yu.

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    Xing-Hui Feng and Yu-Xi Feng have equally contributed to this study.

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    Yu, XZ., Feng, XH. & Feng, YX. Phytotoxicity and Transport of Gallium (Ga) in Rice Seedlings for 2-Day of Exposure. Bull Environ Contam Toxicol 95, 122–125 (2015). https://doi.org/10.1007/s00128-015-1471-2

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    • DOI: https://doi.org/10.1007/s00128-015-1471-2

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