Characterization of arsenic-resistant endophytic bacteria from hyperaccumulators Pteris vittata and Pteris multifida

被引：68
作者：
Zhu, Ling-Jia [1 ]
Guan, Dong-Xing [1 ]
Luo, Jun [1 ]
Rathinasabapathi, Bala [2 ]
Ma, Lena Q. [1 ,3 ]
机构：
[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Jiangsu, Peoples R China
[2] Univ Florida, Gainesville, FL 32611 USA
[3] Univ Florida, Soil & Water Sci Dept, Gainesville, FL 32611 USA
来源：
CHEMOSPHERE | 2014年 / 113卷
基金：
中国国家自然科学基金;
关键词：
Endophytic bacteria; Pteris vittata; Pteris multifida; Tolerance; Transformation; LEAD ACCUMULATION; GROWTH MEDIA; FERNS; BRASSICA; SOILS;
D O I：
10.1016/j.chemosphere.2014.03.081
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
We isolated and characterized As-resistant endophytic bacteria (AEB) from two arsenic hyperaccumulators. Their plant growth promoting traits and the relation between As tolerance and transformation were evaluated. A total of 41 and 33 AEB were isolated from Pteris vittata (PV) and Pteris multifida (PM) respectively. PV AEB represented 2 genera while PM AEB comprised of 12 genera, with Bacillus sp. being the most dominant bacteria from both plants. All AEB had limited ability in solubilizing P and producing indole acetic acid (IAA) and siderophore. All isolates tolerated 10 mM arsenate (As(V)), with PV isolates being more tolerant to As(V) and PM more tolerant to arsenite (As(III)). Bacterial arsenic tolerance was related to their ability in As(III) oxidation and As(V) reduction as well as their ability to retain As in the biomass to a varying extent. Though AEB showed limited plant growth promoting traits, they were important in arsenic tolerance and speciation in plants. Published by Elsevier Ltd.
引用
收藏
页码：9 / 16
页数：8
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