The effect of plant extracts on growth and photosynthetic fluorescence characteristics of Microcystis flos-aquae
| Autor: | Peimin He, Liu Shao, Meng Tan, Anglu Shen, Shi Yuxin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Cyanobacteria
021110 strategic defence & security studies Microcystis Environmental Engineering biology Plant Extracts 0211 other engineering and technologies Thalia dealbata Erigeron annuus 02 engineering and technology 010501 environmental sciences biology.organism_classification 01 natural sciences Vallisneria spiralis Algal bloom Fluorescence Salix babylonica Alternanthera philoxeroides Botany Photosynthesis Ecosystem 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Water Science and Technology. 82:1102-1110 |
| ISSN: | 1996-9732 0273-1223 |
| DOI: | 10.2166/wst.2020.312 |
| Popis: | The cyanobacteria Microcystis flos-aquae can cause harmful algal blooms in waterbodies, which threaten the normal functioning of aquatic ecosystems and human health. Some plant extracts are considered as promising algaecides. In this study, the effects of ten plant extracts (Cinnamomum camphora, Ginkgo biloba, Firmiana platanifolia, Salix babylonica, Euphorbia humifusa, Erigeron annuus, Solidago canadensis, Alternanthera philoxeroides, Thalia dealbata and Eichhornia crassipes) against M. flos-aquae were investigated. The results showed that all ten plant extracts had a significant inhibitory effect on M. flos-aquae growth after 96 h (P < 0.01). The inhibition rates of S. babylonica, E. humifusa, S. canadensis and A. philoxeroides were over 70.00%. Furthermore, the E. humifusa extract had the best inhibitory effect on the photosynthesis of M. flos-aquae, with the effective quantum yield of photosystem II and maximal relative electron transport rate decreasing by 97.50% and 97.00%, respectively, after 96 h. Additionally, the E. humifusa extract was found to be non-toxic to non-target organisms such as Brachydanio rerio and Vallisneria spiralis within 96 h. This study contributes to the existing knowledge and data of freshwater cyanobacteria blooms, and provides insights for their control and the restoration of freshwater systems affected by cyanobacteria blooms. |
| Databáze: | OpenAIRE |
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