Allelopathic Effect of Potamogeton crispus on Chlorella vulgaris and Microcystis aeruginosa
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
7 7
Page:
68-73
Column:
Date of publication:
2020-04-01
- Abstract:
- One submerged macrophyte and two algae (Chlorella vulgaris and Microcystis aeruginosa) were selected to test the allelopathic effect of submerged macrophyte on algae. The changes of optical density, Chl-a, maximum photochemical quantum yield, relative electron transport rate, soluble sugar, malondialdehyde, and superoxide dismutase activity of the two individual algae and their mixture with mixing ratio of 1 ∶1 were measured at co culture stress of Potamogeton crispus. The growth of Chlorella vulgaris, Microcystis aeruginosa and mixed algae was rapidly and greatly inhibited with the presence of Potamogeton crispus, the maximum inhibition rates were 74.38%, 80.98% and 89.63%, respectively. The values of optical density, Chl-a, soluble sugar and superoxide dismutase of three treatment groups were lower than those in the corresponding control groups, and the profile showed a significantly downward trend with time. The results indicated that the photosynthetic capacity gradually weakened. However, malondialdehyde contents were higher than those in the corresponding control groups during the first six days, indicating the possible occurrence of membrane peroxidation of the algae.
Last Update:
2020-04-01