文献类型：期刊文献

英文题名：Woody species Rhus chinensis Mill. seedlings tolerance to Pb: Physiological and biochemical response

作者：Shi, Xiang[1,2] Wang, Shufeng[1] Wang, Dongxue[1,3] Sun, Haijing[1] Chen, Yitai[1] Liu, Jianfeng[2] Jiang, Zeping[2]

第一作者：施翔

通信作者：Liu, JF[1];Jiang, ZP[1]

机构：[1]Chinese Acad Forestry, Key Lab Tree Breeding Zhejiang Prov, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[3]Forestry Coll Inner Mongolia Agr Univ, Hohhot 010019, Peoples R China

年份：2019

卷号：78

起止页码：63-73

外文期刊名：JOURNAL OF ENVIRONMENTAL SCIENCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000463377700006)】；

基金：This work was supported by the National Natural Science Funds of China (No. 31300509), the special funds from the Central Scientific Research Institute of Public Welfare (No. CAFYBB2014QB016), the Natural Science Funds of Beijing (No. 8152032).

语种：英文

外文关键词：Lead; Tolerance; Subcellular distribution; Chemical form; Low molecular weight organic acids

摘要：Screening potential plant species is a crucial consideration in phytoremediation technology. Our previous study demonstrated that Rhus chinensis Mill. seedlings had potentials for phytoremediation of Pb contaminated soil. However, its bioaccumulation and tolerance characteristics remain unclear. Seedling growth, LMWOAs secreted by roots, Pb subcellular distribution and chemical forms, and mineral elements in R. chinensis tissues were evaluated under different Pb concentrations (0, 25, 50, 100, 200 and 400 mg/L) in culture solution at 14 days after planting. R. chinensis did not show visual symptoms of Pb toxicity under lower Pb treatments; however, Pb significantly declined the growth of seedlings under higher Pb treatments. Higher Pb stress also decreased the concentrations of nitrogen in leaves, but increased the concentrations of P and K in roots. Pb stress also decreased Mn concentrations in leaves. A great quantity of Pb was uptake and mostly retained in R. chinensis roots. Nonetheless, R. chinensis can still concentrate 459.3 and 1102.7 mg/kg Pb in leaves and stems, respectively. Most of Pb in R. chinensis tissues was stored in the cell wall with HAc-, HCl-, and NaCl-extractable form. LMWOAs secreted by R. chinensis roots showed a strong positive correlation with Pb concentrations in all plant tissues and with P in roots. Our results suggested that Pb deposited in the cell wall and integration with phosphate or oxalate might be responsible for the tolerance of R. chinensis under Pb stress in short period. (c) 2018 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.