Premium
The interactive effects of mercury and selenium on metabolic profiles, gene expression and antioxidant enzymes in halophyte S uaeda salsa
Author(s) -
Liu Xiaoli,
Lai Yongkai,
Sun Hushan,
Wang Yiyan,
Zou Ning
Publication year - 2016
Publication title -
environmental toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.813
H-Index - 77
eISSN - 1522-7278
pISSN - 1520-4081
DOI - 10.1002/tox.22057
Subject(s) - halophyte , selenium , mercury (programming language) , salsa , antioxidant , chemistry , environmental chemistry , oxidative stress , food science , enzyme , biology , biochemistry , ecology , salinity , environmental science , organic chemistry , computer science , programming language , greenwich , soil science
Suaeda salsa is the pioneer halophyte in the Yellow River Delta and was consumed as a popular vegetable. Mercury has become a highly risky contaminant in the sediment of intertidal zones of the Yellow River Delta. In this work, we investigated the interactive effects of mercury and selenium in S. salsa on the basis of metabolic profiling, antioxidant enzyme activities and gene expression quantification. Our results showed that mercury exposure (20 μg L −1 ) inhibited plant growth of S. salsa and induced significant metabolic responses and altered expression levels of INPS, CMO, and MDH in S. salsa samples, together with the increased activities of antioxidant enzymes including SOD and POD. Overall, these results indicated osmotic and oxidative stresses, disturbed protein degradation and energy metabolism change in S. salsa after mercury exposures. Additionally, the addition of selenium could induce both antagonistic and synergistic effects including alleviating protein degradation and aggravating osmotic stress caused by mercury. © 2014 Wiley Periodicals, Inc. Environ Toxicol 31: 440–451, 2016.