

FOLLOWUS
1.College of Marine Science and Engineering, College of Life Science, Nanjing Normal University, Nanjing 210023, China
2.Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang 222005, China
3.College of Marine Life and Mariculture, Huaihai Institute of Technology, Lianyungang 222005, China
4.Nanjing Ocean-wisdom Biotech Company, Nanjing 211132, China
YIN Shaowu, yinshaowu@163.com
收稿:2018-12-17,
录用:2019-3-8,
网络首发:2019-04-15,
纸质出版:2020-01
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Integrated transcriptome and physiology analysis of
Tao WANG, Yadong HU, Ming ZHU, et al. Integrated transcriptome and physiology analysis of
Integrated transcriptome and physiology analysis of
Tao WANG, Yadong HU, Ming ZHU, et al. Integrated transcriptome and physiology analysis of
Copper sulfate (CuSO
4
) is widely used in controlling the
Microcystis aeruginosa
blooms. Many studies reported the toxicity mechanisms of Cu
2+
to
M. aeruginosa
at the physiological level
but little is known about a transcriptomic basis of these mechanisms. In the present study
M. aeruginosa
was treated by 0.5 mg/L Cu
2+
(half of the 96-h EC
50
) for 72 h. The results show that Cu
2+
content in
M. aeruginosa
increased after 72 h Cu
2+
exposure
whereas the
F
v
/
F
m
chlorophyll fluorescence value and chlorophyll a content in
M. aeruginosa
sharply decreased. Reactive oxygen species concentration and activity of antioxidant enzymes (superoxide dismutase
catalase and peroxidase) were all increased. These physiological data confirmed toxicity of Cu
2+
to
M. aeruginosa
. The RNA-seq analysis showed that 6 646 725 and 7 880 291 clean reads were obtained for the Cu-treated and control libraries
respectively. The 595 genes (252 downward trend and 343 upward trend) with the Gene Ontology (GO) annotations were divided into three main functional categories:cellular component
molecular function
and biological process. In the Cluster of Orthologous Groups (COG) annotation
418 differentially expressed genes with 25 functional definitions were obtained. Among them
'replication
recombination and repair'
'energy production and conversion'
and 'general function prediction only' were the largest three groups of transcripts. In the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis
genes involved in photosynthesis and oxidative phosphorylation were present at the highest percentages. In addition
the genes involved in photosynthesis and oxidative phosphorylation were identified
and then confirmed using real-time PCR. This study reported the first transcriptome of
M. aeruginosa
. Photosynthesis and oxidative phosphorylation were severely affected by Cu
2+
toxicity
which may have contributed to cell death. These data provide the potential mechanism to explain the CuSO
4
effect on the harmful
M. aeruginosa
.
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