

FOLLOWUS
1.CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, Institution of South China Sea Ecology and Environmental Engineering, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2.State Key Laboratory of Marine Resource Utilization in South China Sea, College of Oceanology, Hainan University, Haikou 570228, China
3.Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou), Guangzhou 511458, China
4.University of Chinese Academy of Sciences, Beijing 100049, China
Yandu LU, E-mail: ydlu@hainu.edu.cn
Wenzhou XIANG, E-mail: xwz@scsio.ac.cn
收稿:2020-03-05,
录用:2020-4-22,
网络首发:2020-06-08,
纸质出版:2021-05
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Isolation of a novel strain of
Zishuo CHEN, Tao LI, Bingjie YANG, et al. Isolation of a novel strain of
Isolation of a novel strain of
Zishuo CHEN, Tao LI, Bingjie YANG, et al. Isolation of a novel strain of
The use of high alkaline medium is a feasible way to provide carbon source and prevent biological contamination for the outdoor cultivation of alkaliphilic microalgae and cyanobacteria. A novel cyanobacterial strain was isolated from the open pond of a marine green alga (
Picochlorum
sp. SCSIO-45015
Sanya
Hainan) and identified as
Cyanobacterium
sp. SCSIO-45682. The effects of initial sodium bicarbonate (NaHCO
3
) concentrations on the growth and biochemical composition of
Cyanobacterium
sp. SCSIO-45682 were investigated. The results demonstrated that
Cyanobacterium
sp. SCSIO-45682 had good adaptation to 16.8-g/L NaHCO
3
(the same concentration of NaHCO
3
used in Zarrouk medium for
Spirulina
). Moreover
the yields of biomass
polysaccharide
chlorophyll
a
(chl
a
)
and phycocyanin increased under high NaHCO
3
concentrations. The maximum final biomass concentration of 2.5 g/L was observed at 8.4-g/L NaHCO
3
while the highest intracellular total saccharide content of 49.2% of dry weight (DW) and exopolysaccharide (EPS) concentration of 93 mg/L were achieved at the NaHCO
3
concentration of 16.8 g/L. The crude protein content declined under high NaHCO
3
concentrations
which provide a possible explanation for the accumulation of polysaccharide. This study shows a good potential of alkaliphilic
Cyanobacterium
sp. SCSIO-45682 as a polysaccharide feedstock.
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