Key Laboratory of Pollution Ecology and Environment Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; University of Chinese Academy of Sciences, Beijing 100039, China.
College of Biological Science & Engineering, Shaanxi Province Key Laboratory of Bio-resources, Shaanxi University of Technology, Hanzhong 723001, China.
J Environ Sci (China). 2022 Mar;113:291-299. doi: 10.1016/j.jes.2021.06.022. Epub 2021 Jul 5.
The effects of different electrode on Solanum nigrum L. seed germination were determined. The result showed that germination percentage (GP) of seeds in treatment T2 (titanium electrode) was 26.6% higher than in control (CK, without electric field). High potassium and calcium concentrations were beneficial for seed enzymatic activity in treatment T2, which could partly explain the increase in GP. Cd accumulation (μg/pot) in S. nigrum treated with any electric field was significantly higher (p<0.05) than in CK without electric field. Specifically, Cd accumulation under the treatment T3 (stainless steel electrode) was the highest both in roots and shoots; this accumulation in shoots and roots were 74.7 % and 67.4 % higher for stainless steel than in CK. This increase must have been associated with a higher Cd concentration in plants and did not exert a significant effect on the biomass. In particular, Cd concentrations in roots and shoots under stainless steel treatment were both significantly higher than in CK (p<0.05), which had to be related to the higher available Cd concentration in the soil in the middle region. Furthermore, it could be attributed to altered soil pH and other soil properties. Moreover, none of the biomasses were significantly affected (p<0.05) by different electrode materials compared to CK.
不同电极对龙葵种子萌发的影响。结果表明，处理 T2（钛电极）中种子的发芽率（GP）比对照（CK，无电场）高 26.6%。高钾和高钙浓度有利于 T2 处理中种子的酶活性，这可以部分解释 GP 的增加。与无电场的 CK 相比，任何电场处理的龙葵中 Cd 积累量（μg/盆）显著增加（p<0.05）。特别是在 T3（不锈钢电极）处理下，根和地上部分的 Cd 积累量最高；与 CK 相比，不锈钢处理的地上部和根部的 Cd 积累量分别增加了 74.7%和 67.4%。这种增加必然与植物中更高的 Cd 浓度有关，并且对生物量没有显著影响。特别是，不锈钢处理下根和地上部的 Cd 浓度均显著高于 CK（p<0.05），这与中部土壤中可利用 Cd 浓度较高有关。此外，这可能与土壤 pH 值和其他土壤特性的改变有关。此外，与 CK 相比，不同电极材料对生物量均无显著影响（p<0.05）。
