bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 13, 2025
While
the
bloom-forming
cyanobacterium
Microcystis
can
exist
as
free-living
single
cells
or
within
dense
mucilaginous
colonies,
drivers
and
consequences
of
colony
formation
remain
unclear.
Here,
we
integrated
metatranscriptomic
datasets
from
two
bloom
events
in
Lake
Taihu,
China,
to
analyze
validate
functional
differences
between
colonial
single-cell
.
Our
results
confirmed
expression
profiles
were
disproportionately
enriched
transcripts
(and
functions)
compared
other
prokaryotic
taxa.
Concomitantly,
viral
infection
strategies
diverged
by
community
morphology:
colony-associated
expressed
lysogeny-associated
genes,
while
exhibited
increased
signatures
lytic
infection.
These
data
are
consistent
with
hypothesis
that
colonies
foster
conditions
favorable
lysogen
formation-likely
due
local
high
cell
densities
resulting
advantage
superinfection
immunity-whereas
solitary
experience
stronger
pressure.
On
a
broader
scale,
our
findings
refine
understanding
dynamics
identifying
how
morphological
states
coincide
distinct
host-virus
interactions.
Cumulatively,
this
work
underscores
importance
shaping
ecology
highlights
need
for
mechanistic
studies
disentangle
interplay
phage
modes,
formation,
microbial
structure.
Applied and Environmental Microbiology,
Год журнала:
2022,
Номер
88(9)
Опубликована: Апрель 19, 2022
Cyanobacterial
harmful
algal
blooms
(cyanoHABs)
degrade
freshwater
ecosystems
globally.
Microcystis
aeruginosa
often
dominates
cyanoHABs
and
produces
microcystin
(MC),
a
class
of
hepatotoxins
that
poses
threats
to
human
animal
health.
Microcystin
toxicity
is
influenced
by
distinct
structural
elements
across
diversity
related
molecules
encoded
variant
Environmental Microbiology Reports,
Год журнала:
2022,
Номер
15(1), С. 3 - 12
Опубликована: Сен. 12, 2022
Billions
of
years
ago,
the
Earth's
waters
were
dominated
by
cyanobacteria.
These
microbes
amassed
to
such
formidable
numbers,
they
ushered
in
a
new
era-starting
with
Great
Oxidation
Event-fuelled
oxygenic
photosynthesis.
Throughout
following
eon,
cyanobacteria
ceded
portions
their
global
aerobic
power
photoautotrophs
rise
eukaryotes
(i.e.
algae
and
higher
plants),
which
co-existed
aquatic
ecosystems.
Yet
while
cyanobacteria's
ecological
success
story
is
one
most
notorious
within
our
planet's
biogeochemical
history,
scientists
this
day
still
seek
unlock
secrets
triumph.
Now,
Anthropocene
has
era
fuelled
excessive
nutrient
inputs
greenhouse
gas
emissions,
are
again
reshaping
biomes.
In
response,
we
experiencing
an
increase
cyanobacterial
bloom
distribution,
duration,
frequency,
leading
unbalanced,
many
instances
degraded,
A
critical
component
resurgence
freshwater-marine
continuum:
serves
transport
blooms,
toxins
produce,
on
premise
that
"water
flows
downhill".
Here,
identify
drivers
contributing
comeback
discuss
future
implications
context
environmental
human
health
along
continuum.
This
Minireview
addresses
overlooked
problem
freshwater
marine
continuum
effects
nutrients
toxic
blooms
moving
these
waters.
Marine
research
have
historically
been
conducted
isolation
independently
another.
Yet,
approach
fails
account
for
interchangeable
transit
biology
through
between
systems,
phenomenon
becoming
major
around
globe.
highlights
what
know
challenges
lie
ahead.
Toxins,
Год журнала:
2018,
Номер
10(11), С. 430 - 430
Опубликована: Окт. 26, 2018
Toxic
cyanobacteria
have
been
shown
to
accumulate
in
drinking
water
treatment
plants
that
are
susceptible
algal
blooms.
However,
the
risk
for
do
not
experience
blooms,
but
receive
a
low
influx
of
cells,
is
well
known.
This
study
determined
extent
cell
accumulation
and
presence
cyanotoxins
across
trains
four
Great
Lakes
region.
Samples
were
collected
microscopic
enumeration
enzyme-linked
immunosorbent
assay
(ELISA)
measurements
microcystins,
anatoxin-a,
saxitoxin,
cylindrospermopsin,
β-methylamino-L-alanine
(BMAA).
Low
influxes
(under
1000
cells/mL)
resulted
significant
accumulations
(over
1
×
105
clarifier
sludge
filter
backwash
samples.
Microcystins
peaked
at
7.2
µg/L
one
sample,
exceeding
raw
concentration
by
factor
12.
Anatoxin-a
was
detected
finished
plant
0.6
µg/L.
BMAA
may
three
samples,
though
inconsistencies
among
ELISAs
call
these
results
into
question.
In
summary,
show
receiving
cells
can
be
toxic
cyanobacterial
accumulation,
therefore,
absence
bloom
source
does
indicate
risk.
Environment International,
Год журнала:
2019,
Номер
133, С. 105195 - 105195
Опубликована: Окт. 22, 2019
Algal
organic
matter
(AOM)
from
seasonal
algal
blooms
may
be
an
important
precursor
of
disinfection
byproducts
(DBPs)
in
drinking
water.
This
paper
presents
the
effect
ferrate(VI)
treatment
on
two
blue-green
algae,
Chlorella
sp.
and
Pseudanabaena
limnetica,
eutrophic
The
results
demonstrated
that
Fe(VI)
removed
cells
by
causing
cell
death,
apoptosis,
lost
integrity,
decreased
AOM
(in
terms
total
carbon)
water
via
oxidation
coagulation.
Chlorination
pre-oxidized
samples
generated
halogenated
DBPs
(including
trihalomethanes,
haloacetic
acids,
haloketones,
chloral
hydrate,
haloacetonitriles,
trichloronitromethane),
but
concentrations
were
lower
than
those
formed
chlorinated
without
pre-treatment
Fe(VI).
Higher
dose,
longer
time,
alkaline
pH
beneficial
controlling
DBPs.
In
bromide-containing
solutions,
negligible
amount
bromo-DBPs
pre-oxidation,
mainly
subsequent
chlorination.
