文献类型：期刊文献

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

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

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

第一作者：施翔

机构：[1]Research Institute of Subtropical Forestry,Key Laboratory of Tree Breeding of Zhejiang Province,Chinese Academy of Forestry;[2]Research Institute of Forestry,Chinese Academy of Forestry;[3]Forestry College of Inner Mongolia Agricultural University

年份：2019

卷号：0

期号：4

起止页码：63-73

中文期刊名：环境科学学报：英文版

收录：CSTPCD;;Scopus;CSCD:【CSCD2019_2020】；PubMed;

基金：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

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

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

分类号：X53;X173

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 at14 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 NaC l-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.
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 at14 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 NaC l-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.