Wang Yangyang, Lv Ningqing, Mao Xuhui, Yan Zheng, Wang Jinsheng, Tan Wenbing, Li Xiang, Liu Hui, Wang Lei, Xi Beidou
Key Laboratory of Clean Energy of Liaoning, College of Energy and Environment, Shenyang Aerospace University Shenyang 110136 P. R. China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences Beijing 100012 P. R. China
RSC Adv. 2018 Sep 27;8(58):33383-33390. doi: 10.1039/c8ra04015j. eCollection 2018 Sep 24.
For the purpose of screening a potential Cd-hyperaccumulator for Cd-contaminated soil in paddy fields, four kinds of wetland emergent plants ( L., L., Presl and L.) were investigated for their cadmium tolerance and accumulation characteristics under hydroponic conditions. The physiological responses of plants, Cd concentration in tissues, Cd accumulation, bioaccumulation factor (BCF) and translocation factor (TCF) were investigated to evaluate the abilities of wetland emergent plants to absorb and accumulate Cd. In comparison with the other selected emergent plants, L. has the strongest Cd-tolerance for the absence of Cd toxic symptoms and a Cd concentration as high as 127.3 mg kg in shoots. Due to its large biomass, the Cd accumulation could reach up to 9.4 mg per plant in roots and 5.7 mg per plant in shoots, respectively. L. possesses the highest TCF, and its BCF for Cd increased with increasing concentration of spiked Cd in the hydroponic solutions. The results indicate that L. is a potential Cd-hyperaccumulator that may have a strong capacity for extracting Cd from Cd-contaminated paddy soils.
为了筛选一种可用于水田镉污染土壤修复的潜在镉超富集植物，研究了四种湿地挺水植物（[植物名称1拉丁文]、[植物名称2拉丁文]、[植物名称3拉丁文]和[植物名称4拉丁文]）在水培条件下的耐镉性和积累特性。通过研究植物的生理响应、组织中的镉浓度、镉积累量、生物积累系数（BCF）和转运系数（TCF），来评估湿地挺水植物吸收和积累镉的能力。与其他选定的挺水植物相比，[植物名称1]对镉具有最强的耐受性，未出现镉中毒症状，地上部分镉浓度高达127.3 mg/kg。由于其生物量较大，根部镉积累量可达每株9.4 mg，地上部分镉积累量可达每株5.7 mg。[植物名称1]具有最高的TCF，其对镉的BCF随着水培溶液中添加镉浓度的增加而增加。结果表明，[植物名称1]是一种潜在的镉超富集植物，可能具有从镉污染的水田土壤中提取镉的强大能力。
