AWWA Water Science,
Journal Year:
2024,
Volume and Issue:
6(6)
Published: Nov. 1, 2024
Abstract
The
proliferation
of
harmful
cyanobacterial
blooms
poses
a
threat
to
the
ecosystem
and
human
health.
Microcystins
(MCs)
are
most
frequently
detected
cyanotoxin
released
by
cyanobacteria,
including
Microcystis
sp.
Our
study
aimed
isolate
potential
MC‐degrading
bacteria
in
Sri
Lankan
freshwater
determine
their
possible
MC‐degradation
pathways.
Twenty‐two
morphologically
distinct
bacterial
strains
from
13
bodies
were
isolated
following
enrichment
assay.
MC‐biodegradation
assays
further
confirmed
21
strains,
with
Bacillus
being
predominant
genus.
strain
altitudinis
BL1,
Beira
Lake,
showed
highest
efficiency
cell
lysis
(80%)
(87%).
PCR
assay
results
absence
mlr
ABCD
genes
all
indicating
presence
uncharacterized
alternative
mechanisms
that
require
exploration.
dual
functions
support
developing
efficient
bacteria‐mediated
strategies
remediate
microcystins
eradicate
‐blooms
tropical
freshwaters.
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(17), P. e36503 - e36503
Published: Aug. 24, 2024
The
interactions
between
bacteria
and
microalgae
play
pivotal
roles
in
resource
allocation,
biomass
accumulation,
nutrient
recycling,
species
succession
aquatic
systems,
offering
ample
opportunities
to
solve
several
social
problems.
escalating
threat
of
harmful
algal
blooms
(HABs)
the
environment
lack
cheap
eco-friendly
algal-biomass
processing
methods
have
been
among
main
problems,
demanding
efficient
sustainable
solutions.
In
light
this,
application
algicidal
control
HABs
enhance
has
promoted
past
few
decades
as
potentially
suitable
mechanisms
those
Hence,
this
comprehensive
review
aims
explore
diverse
interaction
modes
microalgae,
ranging
from
synergistic
antagonistic,
presents
up-to-date
information
in-depth
analysis
their
potential
biotechnological
applications,
particularly
controlling
enhancing
microalgal
processing.
For
instance,
studies
revealed
that
can
effectively
inhibit
growth
PLoS ONE,
Journal Year:
2025,
Volume and Issue:
20(3), P. e0318416 - e0318416
Published: March 5, 2025
This
study
investigates
the
effectiveness
of
biochar
immobilized
with
algicidal
Bacillus
sp.
AK3
and
denitrifying
Alcaligenes
M3
in
mitigating
harmful
algal
blooms
(HABs)
reducing
nitrate
pollution
aquatic
environments.
Over
a
six-day
period,
we
analyzed
changes
bloom-forming
Microcystis
density,
chlorophyll-a
levels
(indicative
biomass),
concentration,
microbial
community
composition
water
treated
M3-immobilized
biochar.
In
treatment
using
biochar,
density
decreased
from
600,000
cells/mL
to
80,000
cells/mL,
concentrations
also
substantially
reduced,
85.7
µg/L
initially
42.8
µg/L.
Nitrate
significantly
approximately
23
mg/L
around
14
by
Day
6,
demonstrating
enhanced
denitrification
capabilities
associated
bacterial
communities.
The
results
showed
significant
shifts
communities,
decrease
Microcystis,
highlighting
specific
activity
AK3.
underscores
potential
biochar-based
treatments
as
sustainable
effective
approach
for
improving
quality
environmental
impacts
nutrient
HABs.
Applied Microbiology and Biotechnology,
Journal Year:
2024,
Volume and Issue:
108(1)
Published: Sept. 16, 2024
Cyanobacterial
harmful
algal
blooms,
particularly
those
dominated
by
Microcystis,
pose
significant
ecological
and
health
risks
worldwide.
This
review
provides
an
overview
of
the
latest
advances
in
biotechnological
approaches
for
mitigating
Microcystis
focusing
on
cyanobactericidal
bacteria,
fungi,
eukaryotic
microalgae,
zooplankton,
aquatic
plants,
cyanophages.
Recently,
promising
results
have
been
obtained
using
bacteria:
not
through
inoculation
cultured
but
rather
nurturing
already
present
periphyton
or
biofilms
plants.
Fungi
microalgae
also
exhibit
algicidal
properties;
however,
their
practical
applications
still
face
challenges.
Zooplankton
grazing
can
improve
water
quality,
hurdles
exist
because
colonial
form
toxin
production
Microcystis.
Aquatic
plants
control
blooms
allelopathy
nutrient
absorption.
Although
cyanophages
hold
promise
control,
strain-specificity
hinders
widespread
use.
Despite
successful
laboratory
validation,
field
biological
methods
are
limited.
Future
research
should
leverage
advanced
molecular
bioinformatic
techniques
to
understand
microbial
interactions
during
offer
insights
into
innovative
strategies.
progress,
efficacy
under
conditions
requires
further
verification,
emphasizing
importance
integrating
multi-meta-omics
with
address
challenges
posed
blooms.
KEY
POINTS:
•
A
diverse
range
is
presented
suppressing
Efficacy
experiments
needs
be
proved
applications.
Multi-meta-omics
novel
dynamics
interactions.
Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: Jan. 16, 2024
The
aim
was
to
determine
the
response
of
a
bloom-forming
Microcystis
aeruginosa
climatic
changes.
Cultures
M.
FACHB
905
were
grown
at
two
temperatures
(25°C,
30°C)
and
exposed
high
photosynthetically
active
radiation
(PAR:
400–700
nm)
alone
or
combined
with
UVR
(PAR
+
UVR:
295–700
for
specified
times.
It
found
that
increased
temperature
enhanced
sensitivity
both
PAR
as
shown
by
reduced
PSII
quantum
yields
(
F
v
/F
m
)
in
comparison
growth
(25°C),
presence
significantly
exacerbated
photoinhibition.
cells
exhibited
lower
repair
rate
K
rec
sustained
nonphotochemical
quenching
(NPQs)
induction
during
exposure,
particularly
UVR.
Although
worked
induced
higher
SOD
CAT
activity
promoted
removal
PsbA,
it
seemed
not
enough
prevent
damage
effect
from
them
showing
value
photoinactivation
constant
pi
).
In
addition,
energetic
cost
microcystin
synthesis
probably
led
materials
energy
available
PsbA
turnover,
thus
may
partly
account
declination
photosynthetic
following
exposure.
Our
findings
suggest
modulates
affecting
defense
capacity,
influencing
competitiveness
abundance
future
water
environment.
