Algicidal activity recovery by a Li-doped up-conversion material converting visible light into UV
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AbstractCitrobacter sp. R1, a highly efficient algicidal bacterium, undergoes a serious degeneration after long-term preservation. Here, we prepared a Li-doped up-conversion material ([Y2SiO5; Li (1%)]) to recover the degenerated Strain R1. As a result, the [Y2SiO5; Li (1%)] successfully enhanced the maximum algicidal activity of Strain R1 from 43.2 ± 1.2 to 72.5 ± 1.3%. In terms of recovery mechanisms, 1) the [Y2SiO5; Li (1%)] could convert visible light into UVC and UVA with unusual wavelengths, creating conditions for inducing reverse mutation in Strain R1, affecting the metabolism of Strain R1 and then recovering the bacterium; 2) the [Y2SiO5; Li (1%)] did not only enhance the secretion of 3-hydroxypropionic acid, the algicidal compound which Strain R1 continues to produce even after degeneration, but also it recovered the ability of Strain R1 to secrete three new algicidal compounds. This study provides a new idea of employing up-conversion material [Y2SiO5; Li (1%)] in microbial degeneration recovery.
All Author(s) ListPengfei Sun, Jingyu Zhao, Jun Tang, Lin Li, Po Keung Wong, Lirong Song, Yonghong Wu
Journal nameScience of the Total Environment
Year2020
Month6
Day10
Volume Number720
PublisherElsevier
Place of PublicationNew York
Article number137596
ISSN0048-9697
eISSN1879-1026
LanguagesEnglish-United States
KeywordsAlgicidal bacterium, Microbial degeneration recovery, Up-conversion material, Recovery mechanism, Algicidal compounds

Last updated on 2021-19-06 at 00:10