1. Polyphenolic Concentrations and Algal Inhibition in the Presence of Rice Straw or Barley Straw Extract.
- Author
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Wren, H. and Savin, M.
- Subjects
STRAW ,RICE ,ALGAL growth ,ALGAL blooms ,GREEN algae ,RICE straw ,BARLEY ,MICROCYSTIS ,FRESHWATER algae - Abstract
Harmful algal blooms are increasing in size, duration, and intensity around the globe. For several decades, cereal straws have been recognized as a viable algal control. The objective of this study was to explore the relationship between algal growth in aqueous cultures and total phenolics and flavonoids after the addition of barley (Hordeum vulgare) and rice (Oryza sativa L.) straw decomposition extracts. Results showed significant inhibition by 5.0 g/L rice straw extract on both Microcystis aeruginosa, a cyanobacteria responsible for freshwater harmful algal blooms, and Raphidocelis subcapitata, a green alga. Results also showed that the overall extract concentration of either barley or rice straw might be more important for the inhibition of green algae, whereas the particular compounds released during the decomposition of rice straw may be more important for cyanobacterial inhibition. However, more specific identification of flavonoids and phenolic compounds should be conducted to determine their inhibitory role(s). [ABSTRACT FROM AUTHOR]
- Published
- 2023