

FOLLOWUS
1.Engineering Lab of Henan Province for Aquatic Animal Disease Control, Engineering Technology Research Center of Henan Province for Aquatic Animal Cultivation, College of Fisheries, Henan Normal University, Xinxiang 453007, China
2.Australian Rivers Institute, Griffith University, Nathan, Queensland 4111, Australia
Xuejun LI,xjli@htu.cn
收稿:2021-12-30,
录用:2022-3-22,
网络首发:2022-05-19,
纸质出版:2022-09
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Ecological damage of submerged macrophyte
Yunni GAO, Hui YANG, Xiaofei GAO, et al. Ecological damage of submerged macrophyte
Ecological damage of submerged macrophyte
Yunni GAO, Hui YANG, Xiaofei GAO, et al. Ecological damage of submerged macrophyte
To explore how decomposed
Microcystis
-dominant cyanobacterial blooms affect submerged macrophytes
the submerged plant
Myriophyllum spicatum
was exposed to cell extracts from microcystin (MC)- and non-MC-producing
Microcystis
strains in a laboratory experiment. Results showed that both
Microcystis
cell extracts exerted obvious damages to plant biomass
photosynthesis
primary and secondary metabolism measures
and resistance of plant antioxidant systems
with MC-producing
Microcystis
having stronger effects due to the presence of MCs. Cyanotoxins other than MCs responsible for the negative effects from both
Microcystis
strains needs further identification. The Shannon diversity and Chao1 indices of epiphytic and planktonic bacteria were decreased by the cell extracts from both
Microcystis
strains. However
epiphytic and planktonic bacterial communities responded differently to
Microcystis
cell extracts at the genus level. The dominant genera of planktonic bacteria including
Enterobacter
Pseudomonas
and
Novosphingobium
from phylum Proteobacteria
Chryseobacterium
from phylum Bacteroidetes
and
Microbacterium
from Actinobacteriota in the treatments with cell extracts were previously reported to have strains with algicidal and MC-degrading capabilities. Bacterial genes associated with energy production and conversion
amino acid transport and metabolism
and inorganic ion transport and metabolism
were more abundant in both treatments than the control for planktonic bacteria
but less abundant for epiphytic bacteria. We speculate that planktonic bacterial communities have the potential to use and degrade substances derived from
Microcystis
cell extracts
which may be beneficial for
M
.
spicatum
to alleviate damages from
Microcystis
. Further research is needed to verify the structure and function dynamics of epiphytic and planktonic bacteria in the interaction between cyanobacteria and submerged macrophytes.
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