Liang Shu-Xuan, Gao Ning, Li Xiliang, Xi Xiaocan
College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, China.
College of Public Health, Hebei University, Baoding, 071000, China.
Mol Biol Rep. 2018 Dec;45(6):2609-2614. doi: 10.1007/s11033-018-4430-2. Epub 2018 Oct 24.
The germination and growth of seedlings are not only essential stages in plant growth but also indicator of environmental stress. Evaluation of seed germination and early seedling in order to improve the understanding of influential processes of exogenic substances. This study aimed to reveal the possible toxicity of antimony (Sb) using Raphanus sativus L. Radish (radish) and Brassica napus L. (rape) seeds as the experimental materials. With Sb concentrations ranging from 2 to 100 mg/L, the seed germination and seedlings growth were investigated by calculating the germination rate, germinative energy, germination index, vitality index and root elongation. The results indicated that Sb exhibited different levels of toxicity to different plants. The low concentration of Sb increased the germination rate and germination index of rape seeds, whereas high concentrations of Sb sharply decreased the germination rate and germination index when the Sb was greater than 10 mg/L. The radish seeds remained almost constant. The germinative energy of both seeds exhibited the same change. In addition, the root elongation was more sensitive to the antimony pollution than the germination rate was. The vitality index decayed exponentially as the Sb concentration increased for both species of seed. These results have significant ecological meaning in assessing the toxicity of Sb.
种子的萌发和生长不仅是植物生长过程中的关键阶段，也是环境胁迫的指标。评估种子萌发和幼苗早期生长情况，有助于增进对外源物质影响过程的理解。本研究旨在以萝卜（Raphanus sativus L.）和油菜（Brassica napus L.）种子为实验材料，揭示锑（Sb）可能存在的毒性。设置Sb浓度范围为2至100mg/L，通过计算发芽率、发芽势、发芽指数、活力指数和根伸长，研究种子萌发和幼苗生长情况。结果表明，Sb对不同植物表现出不同程度的毒性。低浓度Sb提高了油菜种子的发芽率和发芽指数，而当Sb浓度大于10mg/L时，高浓度Sb显著降低了发芽率和发芽指数。萝卜种子的发芽率几乎保持不变。两种种子的发芽势呈现相同变化。此外，根伸长对锑污染比发芽率更敏感。随着Sb浓度增加，两种种子的活力指数均呈指数下降。这些结果对于评估Sb的毒性具有重要的生态学意义。
