Effects of exogenous melatonin on growth and cadmium content of Zizyphus acidojujuba seedlings

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Ren, Si^1 ; Deng, Qun-Xian^1 ; Peng, Jing-Wen^1 ; Lin, Li-Jin^2 ; Zhang, Hui-Feng^1

College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China^1

Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, China^2

关键词: Cadmium content;    Cadmiums (Cd);    Fruit trees;    Heavy metal stress;    Photosynthetic pigment contents;    Pot experiment;    Soluble proteins;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/4/042006/pdf
DOI  :  10.1088/1755-1315/199/4/042006

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

To study the effects of exogenous melatonin on the repair of fruit tree seedlings under heavy metal stress, Zizyphus acidojujuba seedlings were treated with different concentrations of exogenous melatonin (0, 50, 100, 150, and 200 μmol L-1) by root-irrigation under cadmium (Cd) stress (5 mg kg-1) by a pot experiment. The results showed that compared with the control (0 μmol L-1), root-irrigation with exogenous melatonin reduced the leaves biomass and photosynthetic pigment content of the Z. acidojujuba seedlings, and also reduced the SOD, POD activity and soluble protein content. In addition to 50 μmol L-1 exogenous melatonin reduced the Cd content in roots of Z. acidojujuba seedlings, the other treatments increased the Cd content in the roots and leaves of Z. acidojujuba seedlings under irrigated exogenous melatonin, and exogenous melatonin also promoted the transport of Cd from the roots of Z. acidojujuba seedlings to the shoots, with all the maximum appeared at 200 μmol L-1. Therefore, under the conditions of Cd pollution, exogenous melatonin inhibited the growth and increased the Cd content of Z. acidojujuba seedlings. As the concentration of exogenous melatonin increased, the inhibitory intensity and increased amount was also increased.