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- Title
水杨酸对刚毛藻生长的抑制作用.
- Authors
熊珍珍; 毕永红
- Abstract
In recent years, the rapid proliferation of Cladophora has severely affected aquaculture water and drinking water. In order to develop the methods to inhibit the rapid proliferation of Cladophora, Cladophora oligoclona was selected as the experimental object, treated with different concentrations (0.2, 0.25, 0.3, 0.35 and 0.4 g·L-1) of salicylic acid. The content of chlorophyll a (Chl a), the maximum photochemical efficiency of photosynthetic system II (F v/F m), the activities of superoxide dismutase (SOD) and peroxidase (POD), the contents of protein and malondialdehyde (MDA) were measured, and the microscopic structure of algal cells were also observed. The results showed that salicylic acid could inhibit the growth of C. oligoclona, and the content of Chl a decreased gradu ally with the increase of salicylic acid concentration, which demonstrated a significant dose-effect relationship. After 96 h exposure, the inhibition rate of C. oligoclona reached 73.64% under the treatment of 0.4 g·L-1 salicylic acid. The 96 h median effect concentration (96 h-EC50) on C. oligoclona was 0.262 g·L-1. Compared with the control group, salicylic acid with 0.2 ~0.4 g·L-1 could significantly decrease F v/F m(P <0.01), the activity of SOD and POD (P <0.01), and the protein content (P <0.01), while the content of MDA significantly increased (P <0.01). After treatment with salicylic acid, the color of algae cells gradually turned yellow and white, and the number of pyrenoid decreased. It was concluded that salicylic acid damaged the photosynthetic system II and reduced its photosynthesis efficiency, which resulted in the decrease of algal assimilation products. The integrity of the membrane system was destroyed and the enzyme activity of the cellular antioxidant system was inhibited. Eventually, the growth of C. oligoclona was inhibited. In view of this, salicylic acid has the potential to be developed as an inhibitor of the rapid proliferation of C. oligoclona.
- Publication
Asian Journals of Ecotoxicology, 2021, Vol 16, Issue 6, p152
- ISSN
1673-5897
- Publication type
Article
- DOI
10.7524/AJE.1673-5897.20201112002