Open AccessStudy on the tolerance to heavy metal Pb and Pb accumulation of Sedum aizoon L.
Author(s) -
Yongdong Xie,
Yan Wang,
LiTao Yang,
Haixia Wang,
Zhongqun He
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/310/5/052033
Subject(s) - chemistry , point of delivery , sedum , hyperaccumulator , botany , horticulture , zoology , environmental chemistry , biology , heavy metals , phytoremediation
In this study, using Sedum aizoon L. as experimental materials. Through hydroponic experiment, the effects of different concentration of pb 2+ 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 Pb 2+ 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 Pb 2 + 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 Pb 2+ 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 Pb 2+ on the transfer coefficient of Pb 2+ size order for 60 >100 >20 > 140> 0(mg·L −1 ).