MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing, 100871, China.
Environ Sci Pollut Res Int. 2018 May;25(13):12507-12514. doi: 10.1007/s11356-018-1486-4. Epub 2018 Feb 20.
To better monitor and remediate environments contaminated by cadmium (Cd), plants are used as hyperaccumulators or biomonitors; however, few have been identified for aquatic Cd pollution. In our study, two aquatic ornamental plants, Microsorum pteropus (Blume) Copel. and Echinodorus grisebachii Small, were studied for their Cd accumulation capacity, morphological characteristics, and leaf physiological indexes. Microsorum pteropus (Blume) Copel. leaf has the potential to hyperaccumulate Cd (166 mg/kg dry weight for 1 mg/L exposure), with no significant physiological difference under exposure. Echinodorus grisebachii Small had sensitive diagnostic responses to Cd toxicity, such as significant decreases in Chl (a + b) and Chl-a/b, increased peroxidase (POD) activity, greater malondialdehyde (MDA) content, and increased soluble sugar content. These results suggest that Microsorum pteropus (Blume) Copel. could have the potential to be a Cd hyperaccumulator, while Echinodorus grisebachii Small could serve as a biomonitor for Cd-contaminated water bodies.
为了更好地监测和修复受镉（Cd）污染的环境，人们使用植物作为超富集植物或生物监测器；然而，目前很少有植物被发现能够用于水生 Cd 污染。在我们的研究中，研究了两种水生观赏植物，水蕴草（Microsorum pteropus (Blume) Copel.）和埃及水剑草（Echinodorus grisebachii Small），以评估它们对 Cd 的积累能力、形态特征和叶片生理指标。水蕴草叶片具有超富集 Cd 的潜力（在 1mg/L 暴露下，干重为 166mg/kg），在暴露下没有明显的生理差异。埃及水剑草对 Cd 毒性具有敏感的诊断反应，例如 Chl（a+b）和 Chl-a/b 显著下降、过氧化物酶（POD）活性增加、丙二醛（MDA）含量增加和可溶性糖含量增加。这些结果表明，水蕴草可能具有成为 Cd 超富集植物的潜力，而埃及水剑草可以作为 Cd 污染水体的生物监测器。
