UV-C suppression on hazardous metabolites in Microcystis aeruginosa: Unsynchronized production of microcystins and odorous compounds at population and single-cell level

Yi Tao, Delin Hou, Tingru Zhou, Huansheng Cao, Wen Zhang, Xuejian Wang

Research output: Contribution to journalArticle

Abstract

The effectiveness of UV-C towards the toxin and odor of M. aeruginosa at population and single cell levels were investigated in three ways. In the absence of UV-C, MC-LR and β-cyclocitral production show similar pattern of incremental rate with growth rate on population level shown as intracellular concentrations of MC-LR (CMC) and β-cyclocitral (CBCC), but the cellular quota of MC-LR (QMC) and β-cyclocitral (QBCC) at single-cell level reached the maximum values, 37.5 ± 1.2 fg cell−1 and 4.3 ± 0.1 fg cell−1, just after the early exponential phase. Second, upon UV-C irradiation, the CMC consistently decreased by 10–41% with increase of UV-C dosage (50–200 mJ cm-2) while CBCC increased by 2–14%. Third, during the 14 days’ post-UV incubation, UV-C at 75–200 mJ cm-2 induced remarkable suppressing effects on both CMC and CBCC for 3–14 days. The suppressing effects on QMC and QBCC were induced by UV-C at 100 mJ cm-2 and above, with shorter suppressing periods by 1–4 days and lower decremental rates by 21%–30% than that of CMC and CBCC, indicating interruptions on biosynthesis processes partially contribute to suppression effects of CMC and CBCC. The suppression effect on either CBCC or QBCC, with higher decrement rates while lower recovery rates, was more severe than CMC and QMC.

Original languageEnglish (US)
Pages (from-to)281-289
Number of pages9
JournalJournal of Hazardous Materials
Volume359
DOIs
StatePublished - Oct 5 2018

Fingerprint

Microcystins
Microcystis
Biosynthesis
Odors
Metabolites
metabolite
Irradiation
Recovery
Population
odor
toxin
irradiation
incubation
cyclobutanecarbonylcarnitine
rate
effect
Growth

Keywords

  • Cell quota
  • MC-LR
  • Microcystis
  • UV-C irradiation
  • β-cyclocitral

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

UV-C suppression on hazardous metabolites in Microcystis aeruginosa : Unsynchronized production of microcystins and odorous compounds at population and single-cell level. / Tao, Yi; Hou, Delin; Zhou, Tingru; Cao, Huansheng; Zhang, Wen; Wang, Xuejian.

In: Journal of Hazardous Materials, Vol. 359, 05.10.2018, p. 281-289.

Research output: Contribution to journalArticle

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