文献类型：期刊文献

英文题名：Copper-dependent control of uptake, translocation and accumulation of cadmium in hyperaccumlator Sedum alfredii

作者：Ma, Chunjie[1] Zhang, Qi[2] Guo, Zhaoyuan[1] Guo, Xiaonuo[1] Song, Wenhua[1] Ma, Hanhan[1] Zhou, Zhongle[1] Zhuo, Renying[3] Zhang, Haiyan[1]

第一作者：Ma, Chunjie

通信作者：Zhang, HY[1]

机构：[1]Tianjin Normal Univ, Coll Life Sci, Tianjin Key Lab Anim & Plant Resistance, Tianjin 300387, Peoples R China;[2]Tangshan Normal Univ, Dept Life Sci, Tangshan 063000, Peoples R China;[3]Chinese Acad Forestry, Res Inst Subtrop Forestry, Key Lab Tree Breeding Zhejiang Prov, Hangzhou 311400, Peoples R China

年份：2024

卷号：921

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20240915637800);Scopus(收录号：2-s2.0-85185723898);WOS:【SCI-EXPANDED(收录号:WOS:001205788200001)】；

基金：This work was supported by the National Natural Science Foundation of China (31470292) and the Natural Science Foundation of Tianjin (18JCZDJC97900) .

语种：英文

外文关键词：Cadmium; Copper; Sedum alfredii; Cell wall modification; Heavy metal sequestration

摘要：Cadmium (Cd) is detrimental to plant growth and threatens human health. Here, we investigated the potential for remediation of Cd-contaminated soil with high copper (Cu) background using Cd hyperaccumulator ecotype (HE) Sedum alfredii. We assessed effects of Cu on Cd accumulation, compartmentation and translocation in HE S. alfredii, and compared with those in a related non-accumulator ecotype (NHE). We found that Cu supply significantly induced Cd accumulation in roots and shoots of long-term soil-cultivated HE S. alfredii. A large fraction of root Cd was accumulated in the organelles, but a small fraction was stored in the cell wall. Importantly, Cu addition reduced Cd accumulation in the cell wall and the organelles in root cells. Furthermore, leaf cell capacity to sequestrate Cd in the organelles was greatly improved upon Cu exposure. We also found that genes involving metal transport and cell wall remodeling were distinctly regulated to mediate Cd accumulation in HE S. alfredii. These findings indicate that Cu-dependent decrease of root cell-wall-bound Cd, and stimulation of efflux/influx of organelle Cd transport in root and leaf cells plays a role in the dramatic Cd hyperaccumulation expressed in naturally survived HE S. alfredii.