期刊
ENVIRONMENTAL POLLUTION
卷 248, 期 -, 页码 114-120出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2019.01.120
关键词
Heavy metal; REEs; Macrophytes; Polyamine metabolism; Antioxidation
资金
- Major Science and Technology Program for Water Pollution Control and Treatment [2017ZX07203-003]
- Major Project of Hydrobios Resources in Jiangsu Province [ZYHB16-3]
- Jiangsu Provincial Natural Science Foundation of China [BK20170572]
- Three Term Project of Aquaculture of Jiangsu Province in China [D2017-2-4]
Nickel is a ubiquitous heavy-metal pollutant in lakes and severely affects aquatic organisms. Aquatic plants are often initially linked to having heavy metal contents and further are proposed as phytoremediation agent to remove heavy metal from water. Although the toxic effects of nickel on aquatic plants are thoroughly explored, the effective investigation to increase Ni tolerance is still in its infancy. The role of rare-earth elements (REEs) in plant resisting heavy-metal pollution has recently received considerable interest. To explore the physiological effects of REEs on Potamogeton crispus under Ni stress, we explored whether or not the additive exposure to low-dose yttrium (Y; 2.5 mu M) promotes the poly amine metabolism, antioxidation, and photosynthesis performance of P. crispus under Ni stress values of 0, 50, 100, 150, and 200 mu M. Results showed that Y exposure did not influence Ni bioaccumulation in P. crispus. Furthermore, Y exposure alleviated the adverse effects of Ni stress to convergent degrees because Y positively converts putrescine into spermidine and spermine, inhibits oxidative stress, increases the total chlorophyll content, and maximum/potential quantum efficiency of photosystem II. We concluded that low-dose Y can positively regulate polyamine transformation, inhibit oxidative stress, stimulate photosynthesis, and finally promote the resist ability of P. crispus to nickel stress. Thus, REEs have potential to be applied in regulating submerged plant tolerance to aquatic heavy-metal pollution. (C) 2019 Published by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据