Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 655, Issue -, Pages 823-830Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2018.11.296
Keywords
Allelopathic effects; Submerged macrophyte; Multifractal analysis; Oxidative damage; Microbial diversity
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Funding
- National Science Foundation of China [51308127]
- Major Science and Technology Program for Water Pollution Control and Treatment [2012ZX07103-004]
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This study investigated the allelopathic effects of Microcystis aeruginosa (M. aeruginosa) extracts and exudates on the physiological responses, photosynthetic activity, and microbial structure of biofilms on leaves of Vallisneria natans (V. natans). By measuring physiological and photosynthetic indices, the results showed that M. aeruginosa allelochemicals inhibited photosynthesis, oxidative stress and antioxidant system stress response in the biofilms of V. natans leaves. Multifractal analysis found that the surface topography of V. natans leaves was altered due to the allelochemicals found in M. aeruginosa. Microbial diversity on the leaves was analyzed using highthroughput sequencing, and the results showed that M. aeruginosa exudates had a stronger effects on the microbial community structure of biofilms compared to extracts. These findings highlight how cyanobacterial allelochemicals induce negative effects on submerged macrophytes. (c) 2018 Elsevier B. V. All rights reserved.
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