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Lead-induced oxidative stress triggers root cell wall remodeling and increases lead absorption through esterification of cell wall polysaccharide

文献类型：期刊论文

作者Zhang, Jing2,3; Qian, Yiguang4; Chen, Zhongbing1; Amee, Maurice3; Niu, Hong2; Du, Dongyun2; Yao, Jun5; Chen, Ke2; Chen, Liang3; Sun, Jie2
刊名JOURNAL OF HAZARDOUS MATERIALS
出版日期2020-03-05
卷号385页码:12
关键词Tall fescue Lead Root architecture Reactive oxygen species Carboxyl groups
ISSN号0304-3894
DOI10.1016/j.jhazmat.2019.121524
英文摘要Tall fescue (Festuca arundinacea Schreb) shows remarkable tolerance to lead (Pb), but the mechanisms involved in metal tolerance are not yet well understood. Here, tall fescue were firstly cultivated hydroponically with Pb2+ (0, 50, 200 and 1000 mg/L) for 14 days. The results showed that remodeling of root architecture plays important roles in tolerance of tall fescue to Pb2+ stress. Increased cell wall (CW) components contribute to restrict high amount of Pb2+ in roots. Additionally, the uronic acid contents of pectin, hemicellulose 1 (HC1) and hemicellulose 2 (HC2) increased under Pb2+ stress. We further observed that tall fescue cultivated with H2O2 showed similar remodeling of root architecture as Pb2+ treatment. Furthermore, pectin, HC1 and HC2 fractions were sequentially extracted from 0 and 10 mM H2O2 treated roots, and Pb2+ adsorption capacity and contents of carboxyl groups of pectin and HC2 fractions were steadily increased under H2O2 treatment in vitro. Our results suggest that degrees of esterification of pectin and HC2 are regulated by H2O2 High amount of low-esterified pectin and HC2 offer more carboxyl groups, provide more Pb2+ binding sites, and restrict more Pb2+ in the CW, which may enhance tolerance of tall fescue to Pb2+ stress.
资助项目National Natural Science Foundation of China[41503067] ; National Natural Science Foundation of China[41603121] ; National Natural Science Foundation of China[41807186] ; Fundamental Research Funds for the Central Universities[CZZ19006]
WOS研究方向Engineering ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000509618300019
出版者ELSEVIER
源URL[http://202.127.146.157/handle/2RYDP1HH/14738]  
专题中国科学院武汉植物园
通讯作者Chen, Ke; Chen, Liang; Sun, Jie
作者单位1.Czech Univ Life Sci Prague, Fac Environm Sci, Dept Appl Ecol, Prague, Czech Republic
2.South Cent Univ Nationalities, Coll Resources & Environm Sci, Hubei Key Lab Catalysis & Mat Sci, Wuhan, Peoples R China
3.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Plant Germplasm Enhancement & Specialty A, Wuhan, Peoples R China
4.Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen Key Lab Environm Chem & Ecol Remediat, Shenzhen, Peoples R China
5.China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Jing,Qian, Yiguang,Chen, Zhongbing,et al. Lead-induced oxidative stress triggers root cell wall remodeling and increases lead absorption through esterification of cell wall polysaccharide[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,385:12.
APA Zhang, Jing.,Qian, Yiguang.,Chen, Zhongbing.,Amee, Maurice.,Niu, Hong.,...&Sun, Jie.(2020).Lead-induced oxidative stress triggers root cell wall remodeling and increases lead absorption through esterification of cell wall polysaccharide.JOURNAL OF HAZARDOUS MATERIALS,385,12.
MLA Zhang, Jing,et al."Lead-induced oxidative stress triggers root cell wall remodeling and increases lead absorption through esterification of cell wall polysaccharide".JOURNAL OF HAZARDOUS MATERIALS 385(2020):12.

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来源：武汉植物园

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