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| Toxicity Thresholds of Tetracycline to Plants as Determined by Root Elongation and Its Species Sensitivity Distributions |
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| KeyWord:tetracycline; phytotoxicity; species sensitivity distributions（SSD）; dose-response curve |
| Author Name | Affiliation | | ZHANG Yi-han | College of Resource and Environment, Sichuan Agricultural University, Chengdu 611130, China | | WU Jun | College of Resource and Environment, Sichuan Agricultural University, Chengdu 611130, China | | CHEN Li | Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China | | JIA Chun-hong | Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China | | LI Wen-hua | Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China |
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| Abstract: |
| Dose-response curves and species sensitivity distributions（SSD） of tetracycline to 8 different plant species were investigated by using plant root elongation as endpoints. Toxicity thresholds of tetracycline to plants in aqueous solution were obtained using Log-logistic distribution model, and SSDs were generated with BurrlizO model. The sensitivity of bud and root elongation to tetracycline was in order：root elongation>bud elongation. Plant root elongations were inhibited at high tetracycline concentrations（>10 mg·L-1）, but stimulated at low tetracycline concentrations（0.1~1 mg·L-1） in aqueous solution. Significant differences of the threshold values（ECx） of tetracycline to plants were observed among different species. Tomato and cucumber were the most sensitive, whereas maize was the least to tetracycline in aqueous solution. These findings provide useful information for assessment of tetracycline risk in environment. |
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