Influences of small-scale oscillations on growth inhibition and ultrastructural changes of Microcystis cells

We investigated the effects of small-scale oscillation (SSO) on toxic Microcystis cells. The oscillating device was made of silicon with two axes that had a diameter of ∼40 mm, and a frequency of 2.5 Hz was observed at 150 rpm. The SSO was effective in inhibiting Microcystis growth. Microcystin rele...

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Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2018-11, Vol.53 (13), p.1161-1166
Main Authors: Han, Jisun, Jeon, Bong-Seok, Mizuno, Katsunori, Yoshida, Kenji, Park, Ho-Dong
Format: Article
Language:English
Subjects:
Cell density
Cell membranes
Cell size
Chlorophyll A - metabolism
Cytology
Inhibition
Microcystins - biosynthesis
Microcystis
Microcystis - growth & development
Microcystis - ultrastructure
Microscopy, Electron, Scanning
Microscopy, Electron, Transmission
Morphology
Oscillations
Quotas
Thylakoids
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Summary:We investigated the effects of small-scale oscillation (SSO) on toxic Microcystis cells. The oscillating device was made of silicon with two axes that had a diameter of ∼40 mm, and a frequency of 2.5 Hz was observed at 150 rpm. The SSO was effective in inhibiting Microcystis growth. Microcystin release was not observed, whereas cell density barely increased in the oscillating group. Cell size and morphology of the oscillating group were no different from the control group. However, cell quotas of chl.a and microcystin in the oscillating group were half the level of the control group. Crucially, a number of large-sized holes were observed and layered long linear thylakoids were rarely observed in the oscillating group. Therefore, SSO was found to be very effective in Microcystis growth inhibition, and it caused ultrastructural changes without damage to the cell membrane and subsequent microcystin release.
ISSN:1093-4529
1532-4117
DOI:10.1080/10934529.2018.1530329