

FOLLOWUS
1.College of Life Science, Henan Normal University, Xinxiang 453007, China
2.Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
3.Center for Ecological Research, Kyoto University, Shiga 520-2113, Japan
4.College of Life and Environmental Sciences, Wenzhou University, Wenzhou 325000, China
5.Journal of Henan Normal University, Xinxiang 453007, China
Renhui LI, E-mail: renhui.li@wzu.edu.cn, reli@ihb.ac.cn
收稿:2020-07-22,
录用:2020-9-29,
网络首发:2020-11-10,
纸质出版:2021-09
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Relationship between morphospecies and microcystinproducing genotypes of
Yang LIU, Youxin CHEN, Haiyan FANG, et al. Relationship between morphospecies and microcystinproducing genotypes of
Relationship between morphospecies and microcystinproducing genotypes of
Yang LIU, Youxin CHEN, Haiyan FANG, et al. Relationship between morphospecies and microcystinproducing genotypes of
Twenty water bodies in China were sampled
and 186 strains of different
Microcystis
species were isolated
from which eight morphospecies were identified and 43 stains containing the
mcyB
gene were detected. Phylogenetic analysis based on the
mcyB
gene indicated that the microcystin (MC)-producing
Microcystis
in China could be divided into two groups (I and II) and showed significant differences between the two groups. The maximum sequence similarity was 69.1%. Microcystins (MCs) were measured by high-performance liquid chromatography (HPLC) analysis
and no microcystin-RR (MC-RR) was detected in some strains belonging to Group II. Compared to other regions of the world
the proportion of Chinese MC-producing
Microcystis
was different
and the regional differences were more obvious. A whole-cell polymerase chain reactio (PCR) assay was conducted to analyze the proportion of the
mcyB
gene in the laboratory cultured and field cultured
Microcystis
. The proportion of four morphospecies (
M. vividis
M. ichthyoblabe
M. novacekii
and
M. aeruginosa
) that contained the
mcyB
gene exceeded 50% in the field cultured samples. Compared with former studies
M. aeruginosa
was the most likely morphotype that can produce MCs in the world. This study provided new insight of
Microcystis
hazard assessment and field monitoring.
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