Microbiology Research,
Journal Year:
2023,
Volume and Issue:
14(1), P. 243 - 261
Published: Feb. 14, 2023
With
the
rapid
development
of
industry,
Cr
has
become
one
major
heavy
metal
pollutants
in
soil,
severely
impacting
soil
microecology,
among
which
rhizosphere
microorganisms
can
improve
microenvironment
to
promote
plant
growth.
However,
how
bacterial
communities
respond
stress
under
different
cultivation
modes
remains
be
further
studied.
Therefore,
this
study,
a
greenhouse
pot
experiment
combined
with
16S
rRNA
high-throughput
sequencing
technology
was
used
study
effects
at
200
mg
kg−1
on
community
structure
and
diversity
Iris
tectorum
modes.
The
results
showed
that
index
(Shannon
Simpson)
abundance
(Ace
Chao)
increased
significantly
wetland
stress.
Moreover,
changed
by
20.1%
due
addition
Cr,
leading
15.9%
decrease
common
species
community,
Proteobacteria,
Actinobacteria,
Chloroflexi,
Acidobacteriota
accounted
for
more
than
74.8%
total
sequence.
increase
diversity,
rhizosphere-dominant
bacteria
growth-promoting
significantly.
Meanwhile,
symbiotic
network
analysis
found
two
modes,
synergistic
effect
between
dominant
enhanced,
improved.
In
addition,
through
redundancy
analysis,
it
C,
N,
P
nutrients
uncontaminated
were
main
driving
factors
succession
I.
tectorum,
content
contaminated
factor
rhizosphere.
summary,
will
provide
basis
response
interaction
plants
restoration
Bioengineered,
Journal Year:
2022,
Volume and Issue:
13(3), P. 4923 - 4938
Published: Feb. 14, 2022
Industrial
effluents/wastewater
are
the
main
sources
of
hexavalent
chromium
(Cr
(VI))
pollutants
in
environment.
Cr
(VI)
pollution
has
become
one
world's
most
serious
environmental
concerns
due
to
its
long
persistence
environment
and
highly
deadly
nature
living
organisms.
To
widespread
use
industries
is
toxic
common
contaminants.
frequently
non-biodegradable
nature,
which
means
it
stays
for
a
time,
pollutes
soil
water,
poses
substantial
health
risks
humans
wildlife.
In
things,
form
carcinogenic,
genotoxic,
mutagenic.
Physico-chemical
techniques
currently
used
removal
not
environmentally
friendly
large
number
chemicals.
Microbes
have
many
natural
or
acquired
mechanisms
combat
toxicity,
such
as
biosorption,
reduction,
subsequent
efflux,
bioaccumulation.
This
review
focuses
on
microbial
responses
toxicity
potential
their
remediation.
Moreover,
research
problem
prospects
future
discussed
order
fill
these
gaps
overcome
associated
with
bacterial
bioremediation's
real-time
applicability.
Applied Sciences,
Journal Year:
2021,
Volume and Issue:
11(2), P. 638 - 638
Published: Jan. 11, 2021
Chromium
(Cr)
is
a
common
element
in
the
Earth’s
crust.
It
may
exist
different
oxidation
states,
Cr(0),
Cr(III)
and
Cr(VI),
with
Cr(VI)
being
relatively
stable
largely
predominant.
Chromium’s
peculiarity
that
its
behavior
relies
on
valence
state.
trace
humans
plays
major
role
glucose
fat
metabolism.
The
beneficial
effects
of
obesity
types
2
diabetes
are
known.
has
been
long
considered
an
essential
element,
but
now
it
reclassified
as
nutritional
supplement.
On
other
hand,
human
carcinogen
exposure
to
occurs
both
occupational
environmental
contexts.
induces
also
epigenetic
DNA,
histone
tails
microRNA;
toxicity
seems
be
related
higher
mobility
soil
swifter
penetration
through
cell
membranes
than
Cr(III).
microorganisms
Acinetobacter
sp.
Cr1
Pseudomonas
Cr13
have
suggested
promising
agent
for
bioremediation
Cr(VI).
This
review
intends
underline
important
health
dangerousness
toxic
element.
dual
opposing
roles
this
metal
make
particularly
interesting.
An
overview
recent
literature
reported
support.
Journal of Nanobiotechnology,
Journal Year:
2024,
Volume and Issue:
22(1)
Published: March 5, 2024
Abstract
The
primary
factors
that
restrict
agricultural
productivity
and
jeopardize
human
food
safety
are
heavy
metals
(HMs),
including
arsenic,
cadmium,
lead,
aluminum,
which
adversely
impact
crop
yields
quality.
Plants,
in
their
adaptability,
proactively
engage
a
multitude
of
intricate
processes
to
counteract
the
impacts
HM
toxicity.
These
orchestrate
profound
transformations
at
biomolecular
levels,
showing
plant’s
ability
adapt
thrive
adversity.
In
past
few
decades,
stress
tolerance
crops
has
been
successfully
addressed
through
combination
traditional
breeding
techniques,
cutting-edge
genetic
engineering
methods,
strategic
implementation
marker-dependent
approaches.
Given
remarkable
progress
achieved
this
domain,
it
become
imperative
adopt
integrated
methods
mitigate
potential
risks
arising
from
environmental
contamination
on
yields,
is
crucial
as
we
endeavor
forge
ahead
with
establishment
enduring
systems.
manner,
nanotechnology
emerged
viable
field
sciences.
applications
extensive,
encompassing
regulation
stressors
like
toxic
metals,
improving
efficiency
nutrient
consumption
alleviating
climate
change
effects.
Integrating
nanomaterials
agrochemicals
mitigated
drawbacks
associated
agrochemicals,
challenges
organic
solvent
pollution,
susceptibility
photolysis,
restricted
bioavailability.
Numerous
studies
clearly
show
immense
nanofertilizers
tackling
acute
crisis
toxicity
production.
This
review
seeks
delve
into
using
NPs
effectively
enhance
resilience,
thereby
fostering
an
environmentally
friendly
economically
approach
toward
sustainable
advancement
foreseeable
future.
Plant Stress,
Journal Year:
2024,
Volume and Issue:
11, P. 100394 - 100394
Published: Feb. 8, 2024
Soil
contamination
with
chromium
(Cr)
is
a
serious
and
burgeoning
environmental
problem.
The
infiltration
of
excess
Cr
into
the
food
chain
causes
number
human
health
issues,
including
respiratory
disorders,
cardiovascular
diseases,
renal
failure,
several
types
cancer.
pollution
can
be
contained
by
different
physical,
chemical,
biological
remediation
approaches.
Physical
chemical
methods
are
costly
hazardous
to
environment
as
they
cause
secondary
pollution.
Biological
approaches
such
bioremediation
that
employ
plants
(phytoremediation)
microbes
eco-friendly,
efficient,
cost-effective.
Nonetheless,
conventional
phytoremediation
encounters
limitations
in
large-scale
use
due
restricted
pool
hyperaccumulator
plant
species,
slow
growth
rate,
limited
biomass
production,
plant-contaminant
specificity,
contaminant-mediated
oxidative
stress
plants.
Interestingly,
bacteria
fungi
have
potential
survive
thrive
under
extreme
conditions.
Plant
growth-promoting
(PGPB)
utilize
siderophores,
organic
acids,
biosurfactants,
redox
mechanisms,
biomethylation
convert
metals
soluble
bioavailable
forms.
Further,
these
involved
synthesizing
phytohormones
1-aminocyclopropane-1-carboxylic
acid
(ACC)
deaminase,
acquisition
iron,
nitrogen
fixation,
phosphorus
solubilization,
which
improve
biomass,
thereby
aiding
phytoremediation.
This
literature
review
encompasses
breadth
research
conducted
over
preceding
decade,
underscoring
contemporary
remedial
primary
focus
on
crucial
role
facilitating
Cr.
Moreover,
this
spotlights
underlying
mechanisms
microbe-assisted
betterment
grown
Cr-contaminated
soils.
Journal of Chemistry,
Journal Year:
2021,
Volume and Issue:
2021, P. 1 - 21
Published: June 30, 2021
Heavy
metals
generated
mainly
through
many
anthropogenic
processes,
and
some
natural
processes
have
been
a
great
environmental
challenge
continued
to
be
the
concern
of
researchers
scientists.
This
is
due
their
highest
toxicity
even
at
minimum
concentration
as
they
are
nonbiodegradable
can
persist
in
aquatic
terrestrial
environments
for
long
periods.
Chromium
ions,
especially
hexavalent
ions
(Cr(VI))
different
industrial
process
such
tanneries,
metallurgical,
petroleum,
refractory,
oil
well
drilling,
electroplating,
mining,
textile,
pulp
paper
industries,
among
toxic
heavy
metal
which
pose
effects
human,
plants,
microorganisms,
lives.
review
work
aimed
biosorption
chromium
microbial
biomass,
bacteria,
fungi,
microalgae,
factors
influencing
by
microorganisms
mechanism
involved
remediation
functional
groups
participated
uptake
Cr(VI)
from
contaminated
biosorbents.
The
relatively
more
advantageous
over
conventional
technique
it
rapid,
economical,
requires
minimal
preparatory
steps,
efficient,
needs
no
chemicals,
allows
regeneration
biosorbent
end
process.
Also,
presence
multiple
cell
surfaces
active
binding
sites
allow
easy
greater
number
polluted
samples.
could
useful
creating
new
insights
into
development
advancement
future
technologies
research
on
bioremediation
scale.
