Study on the tolerance to heavy metal Pb and Pb accumulation of Sedum aizoon L.

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Xie, Yongdong^1 ; Yan, Wenyi^1 ; Yang, Luxi^1 ; Wang, Haixia^1 ; He, Zhongqun^1

College of Horticulture, Sichuan Agricultural University, Wenjiang District, Chengdu, Sichuan

611130, China^1

关键词: Atomic absorption spectrometers;    Chlorophyll contents;    Experimental materials;    Hydroponic experiments;    In-vivo;    Pb concentration;    Plant height;    Transfer coefficient;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/5/052033/pdf
DOI  :  10.1088/1755-1315/310/5/052033

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this study, using Sedum aizoon L. as experimental materials. Through hydroponic experiment, the effects of different concentration of pb2+ solution (0, 20, 60, 100, 140mg•L-1) on growth and Lead absorption of Sedum aizoon L. was studied. The change law of SOD, POD, and CAT activity influence on chlorophyll. By using atomic absorption spectrometer, the accumulation of Pb was determined. Results showed that with the increase of Pb2+ concentration, the growth of root was inhibited, but plant height was firstly increase and then decrease, the greatest change was 20 mg•L-1. Compared with the control, chlorophyll content increased with concentration of Pb2+ first drop after increased. The activity of SOD, POD and CAT enzyme was increased first and then decreased. The Pb content of root increased with the increase of Pb2+ concentration, but Pb content of stem and leaf increased after the first drop, and the content was the largest when the Pb concentration was100 mg•L-1. The accumulation of Pb in Sedum aizoon L. in vivo as root > > stem > leaf. Sedum aizoon L. for Pb tolerated, with concentration of Pb2+ on the transfer coefficient of Pb2+ size order for 60 >100 >20 > 140> 0(mg•L-1).