文献类型：期刊文献

英文题名：Xylem-based long-distance transport and phloem remobilization of copper in Salix integra Thunb.

作者：Cao, Yini[1] Ma, Chuanxin[2] Chen, Hongjun[3] Zhang, Jianfeng[1] White, Jason C.[2] Chen, Guangcai[1] Xing, Baoshan[4]

第一作者：Cao, Yini

通信作者：Chen, Guangcai

机构：[1] Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang, 311400, China; [2] Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, CT, 06504, United States; [3] Hunan Commodities Quality Supervision and Inspection Institute, Changsha, 410007, China; [4] Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, United States

年份：2020

卷号：392

外文期刊名：Journal of Hazardous Materials

收录：EI(收录号：20201208308357);Scopus(收录号：2-s2.0-85081673444)

语种：英文

外文关键词：Tissue - Soil pollution - Histology - Copper compounds - Plants (botany) - Bioremediation - Copper - Fluorescence imaging - Sulfur compounds

摘要：Due to high biomass and an ability to accumulate metals, fast-growing tree species are good candidates for phytoremediation. However, little is known about the long-distance transport of heavy metals in woody plants. The present work focused on the xylem transport and phloem remobilization of copper (Cu) in Salix integra Thunb. Seedlings with 45 d preculture were grown in nutrient solutions added with 0.32 and 10 μM CuSO4 for 5 d. Micro X-ray fluorescence imaging showed the high Cu intensity in xylem tissues of both stem and root cross sections, confirming that the xylem played a vital role in Cu transport from roots to shoots. Cu was presented in both xylem sap and phloem exudate, which demonstrates the long-distance transport of Cu via both vascular tissues. Additionally, the 65Cu spiked mature leaf exported approximately 78 % 65Cu to newly emerged shoots, and approximately 22 % downward to the new roots, confirming the bidirectional transport of Cu via phloem. To our knowledge, this is the first report to characterize Cu vascular transport and remobilization in fast-growing woody plants, and the findings provide valuable mechanistic understanding for the phytoremediation of Cu-contaminated soils. ? 2020 Elsevier B.V.