

FOLLOWUS
1.Jiangsu Provincial Key Construction Laboratory of Probiotics Preparation, Huaiyin Institute of Technology, Huai'an 223003, China
2.Jiangsu Provincial Engineering Laboratory for Advanced Materials of Salt Chemical Industry, Huaiyin Institute of Technology, Huai'an 223003, China
3.School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huai'an 223003, China
LUO Chuping, luochuping@163.com
LIU Fei, hyitliu@163.com
收稿:2018-11-06,
录用:2018-12-24,
网络首发:2019-03-08,
纸质出版:2020-01
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Characteristics of intracellular polyphosphate granules and phosphorus-absorption of a marine polyphosphateaccumulating bacterium,
Shiying REN, Xiangqian LI, Xiulian YIN, et al. Characteristics of intracellular polyphosphate granules and phosphorus-absorption of a marine polyphosphateaccumulating bacterium,
Characteristics of intracellular polyphosphate granules and phosphorus-absorption of a marine polyphosphateaccumulating bacterium,
Shiying REN, Xiangqian LI, Xiulian YIN, et al. Characteristics of intracellular polyphosphate granules and phosphorus-absorption of a marine polyphosphateaccumulating bacterium,
Halomonas
sp. YSR-3 was isolated from the Yellow Sea and identified as a polyphosphateaccumulating bacterium and the characteristics of its intracellular polyphosphate (polyP) granules and phosphorus absorption were studied. Most YSR-3 cells stored one or two polyP granules in regular appearance and high-density. The diameter of the granules was about 400 nm measuring by a transmission electron microscope (TEM). After stained with 4
6-diamidino-2-phenylindole (DAPI) and visualized by a fluorescence microscope
the cells turned blue and the granules were bright yellow. The composition of granules includes P (major ingredient)
Mg
S
K
and Ca as detected by an energy dispersive X-ray spectrometer (EDS). When inorganic phosphorus (PO
4
3-
) and ferric ion (Fe
3+
) were added into media
the biomass increased and the cells formed intracellular polyP granules owing to the phosphorus assimilation from media. The YSR-3 obtained higher biomass by adding 0.02 g/L FePO
4
than 0.005 g/L and 0.01 g/L FePO
4
; however
the phosphorus absorption was higher with 0.01 g/L FePO
4
than 0.005 g/L and 0.02 g/L FePO
4
. The optical density at wavelength 480 nm (OD
480 nm
) was 0.79 and 100% cells could form intracellular polyP granules. These results show that strain YSR-3 is able to acquire higher biomass and absorb more inorganic phosphorus when 0.01 g/L FePO
4
is added. The characteristics of absorbing and storing phosphorus as intracellular inorganic polyP granules have a potential for application in high-efficiency phosphorus removal in wastewater treatment.
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