Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
Volume 17, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/ijerph17041294
Keywords
cadmium; bioaccumulation; bioabsorption; Sarcodia suiae; photosynthesis; respiration; photosynthetic pigments
Funding
- Ministry of Science and Technology, Taiwan [106-2611-M-019-009]
- National Natural Science Foundation of China [41576180, 41776088, 41976216]
- Fujian Provincial Natural Science Foundation of China [2014J06014]
- Special Project of Marine Biological Application Technology Cooperative Innovation Center, Fujian Province [XTZX-HYSW-1802]
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This study investigated the changes in bioaccumulation, bioabsorption, photosynthesis rate, respiration rate, and photosynthetic pigments (phycoerythrin, phycocyanin, and allophycocyanin) of Sarcodia suiae following cadmium exposure within 24 h. The bioabsorption was significantly higher than the bioaccumulation at all cadmium levels (p < 0.05). The ratios of bioabsorption/bioaccumulation in light and dark bottles were 2.17 and 1.74, respectively, when S. suiae was exposed to 5 Cd2+ mg/L. The chlorophyll a (Chl-a) concentration, oxygen evolution rate (photosynthetic efficiency), and oxygen consumption rate (respiratory efficiency) decreased with increasing bioaccumulation and ambient cadmium levels. The levels of bioaccumulation and bioabsorption in light environments were significantly higher than those in dark environments (p < 0.05). In addition, the ratios of phycoerythrin (PE)/Chl-a, phycocyanin (PC)/Chl-a, and allophycocyanin (APC)/Chl-a were also higher in light bottles compared to dark bottles at all ambient cadmium levels. These results indicated that the photosynthesis of seaweed will increase bioaccumulation and bioabsorption in a cadmium environment.
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