Treatment of the red tide dinoflagellate Karenia brevis and brevetoxins using USEPA-registered algaecides

Hu, Jing; Berthold, David E.; Wang, Yi; Xiao, Xi; Laughinghouse, Haywood Dail

doi:10.1016/j.hal.2022.102347

Cited by 5 publications

(2 citation statements)

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“…Traditional algaecides such as copper‐based, hydrogen peroxide‐based and chlorine‐based agents, which can be relatively easily manufactured and have been extensively tested and applied in various aquatic systems, including canals, reservoirs and lakes. [ 61 , 62 ] However, the extrapolation of laboratory results to the field for most identified allelochemicals has been hindered, largely due to the high cost of mass production. [ 19 ] As sphingolipids are substantially present in eukaryotic cell plasma membrane and tonoplast, accounting for as much as 10% of total lipids in plants.…”

Section: Discussionmentioning

confidence: 99%

“…[69] Although the persistence of sphingosines in natural water bodies is not well documented in the literature, it is known that various biotic and abiotic factors can affect it, such as cell density, water temperature, alkalinity, depth, stratification, and mixing. [61] Direct spraying or injecting allelochemicals into waters can lead to local high concentrations and result in toxicity. Therefore, allelochemicals-mediated sustained-released microspheres (SRMs) have been suggested as a practical solution to enhance allelochemicals stability, equilibrize active ingredients concentration and extend the release time of products.…”

Section: Practical Prospects and Challenges In Future Product Develop...mentioning

confidence: 99%

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Natural Algaecide Sphingosines Identified in Hybrid Straw Decomposition Driven by White‐Rot Fungi

Hu,

Kokoette,

et al. 2023

Advanced Science

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Harmful algal blooms (HABs), which are promoted by eutrophication and intensified by global warming, occur worldwide. Allelochemicals, which are natural chemicals derived from plants or microbes, are emerging weapons to eliminate these blooms. However, the cost and technical challenges have limited the discovery of novel antialgal allelochemicals. Herein, the decomposition of agricultural straws is manipulated by white‐rot fungi and achieved elevated antialgal efficiency. The transcriptomic analysis reveals that nutrient limitation activated fungal decomposition. By using a comparative nontarget metabolomics approach, a new type of allelochemical sphingosines (including sphinganine, phytosphingosine, sphingosine, and N‐acetylsphingosine) is identified. These novel natural algaecides exhibit superior antialgal capability, with as high as an order of magnitude lower effective concentration on blooming species than other prevalent allelochemicals. The co‐expression relationship between transcriptomic and metabolomic results indicate that sphinganine is strongly correlated with the differentially expressed lignocellulose degradation unigenes. The algal growth suppression is triggered by the activation of programmed cell death, malfunction of algal photosystem and antioxidant system, the disruption on CO2 assimilation and light absorption. The sphingosines reported here are a new category of allelochemicals in addition to the well‐known antialgal natural chemicals, which are potential species‐specific agents for HABs control identified by multi‐omics methodology.

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Section: Discussionmentioning

confidence: 99%

Section: Practical Prospects and Challenges In Future Product Develop...mentioning

confidence: 99%