Nanomaterials,
Год журнала:
2024,
Номер
15(1), С. 17 - 17
Опубликована: Дек. 26, 2024
Microplastics
(MPs)
are
emerging
pollutants
of
global
concern,
while
heavy
metals
such
as
copper
ions
(Cu2+)
longstanding
environmental
contaminants
with
well-documented
toxicity.
This
study
investigates
the
independent
and
combined
effects
polystyrene
microplastics
(PS-MPs)
Cu
on
physiological
biochemical
responses
rice
seedlings
(Oryza
sativa
L.),
a
key
staple
crop.
Hydroponic
experiments
were
conducted
under
four
treatment
conditions:
control
(CK),
PS-MPs
(50
mg·L−1),
(20
mg·L−1
Cu2+),
+
treatment.
The
results
showed
that
had
slight
stimulatory
effect
root
elongation,
exposure
mildly
inhibited
growth.
However,
(PS-MPs
Cu)
demonstrated
no
significant
synergistic
or
additive
toxicity
growth
parameters
root,
stem,
leaf
lengths
biomass
(fresh
dry
weights).
Both
significantly
reduced
peroxidase
(POD)
activity
in
leaf,
indicating
oxidative
stress
disrupted
antioxidant
defenses.
Notably,
treatment,
mitigated
by
adsorbing
Cu2+
ions,
reducing
their
bioavailability,
limiting
accumulation
tissues.
These
findings
reveal
complex
interaction
between
MPs
agricultural
systems.
While
can
alleviate
its
they
also
compromise
activity,
potentially
affecting
plant
resilience
to
stress.
provides
foundation
for
understanding
metals,
emphasizing
need
further
research
into
long-term
agronomic
impacts.
Environment International,
Год журнала:
2024,
Номер
191, С. 108965 - 108965
Опубликована: Авг. 17, 2024
The
coexistence
of
microorganisms
in
complex
soil
environments
greatly
affects
the
environmental
behavior
and
ecological
effects
microplastics
(MPs).
However,
relevant
studies
are
sparse,
internal
mechanisms
remain
unclear.
Herein,
arbuscular
mycorrhizal
fungi
(AMF),
a
common
symbiotic
microorganism
soil-plant
system,
was
proved
to
significantly
affect
MPs
absorption
migration
with
"size
effect".
Specifically,
existence
AMF
accelerated
small-sized
(0.5
μm)
uptake
but
slowed
large-sized
(2
lettuce.
content
0.5
μm
absorbed
by
plants
1.26
times
that
non-AMF
group,
while
2
only
77.62
%
group.
Additionally,
different
on
intake
particle
sizes
also
led
toxic
lettuce,
is,
exacerbated
small-size
toxicity
lettuce
(e.g.,
reduced
plant
biomass,
photosynthesis,
etc),
it
weakened
increased
height,
antioxidant
enzyme
activity,
etc).
above
phenomenon
mainly
because
change
root
structure,
which
can
be
visually
observed
through
intraradical
extraradical
hyphae.
structure
(hyphae)
formed
host
could
enhance
pathway
for
although
not
MPs.
varied
environment
differently
sized
MPs,
promoted
small-particle
aggravated
large-particle
fixation
at
interface.
These
findings
deepen
understanding
pollution
terrestrial
systems
provide
theoretical
basis
technical
support
accurately
assess
pollution.
Environmental Science Nano,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
Nanoplastics
(NPs)
are
chemically
reactive
following
abiotic
and
biotic
weathering
processes.
These
weathered
NPs
have
the
potential
to
facilitate
transformation
of
legacy
contaminants,
such
as
heavy
metals.
Nanomaterials,
Год журнала:
2024,
Номер
15(1), С. 17 - 17
Опубликована: Дек. 26, 2024
Microplastics
(MPs)
are
emerging
pollutants
of
global
concern,
while
heavy
metals
such
as
copper
ions
(Cu2+)
longstanding
environmental
contaminants
with
well-documented
toxicity.
This
study
investigates
the
independent
and
combined
effects
polystyrene
microplastics
(PS-MPs)
Cu
on
physiological
biochemical
responses
rice
seedlings
(Oryza
sativa
L.),
a
key
staple
crop.
Hydroponic
experiments
were
conducted
under
four
treatment
conditions:
control
(CK),
PS-MPs
(50
mg·L−1),
(20
mg·L−1
Cu2+),
+
treatment.
The
results
showed
that
had
slight
stimulatory
effect
root
elongation,
exposure
mildly
inhibited
growth.
However,
(PS-MPs
Cu)
demonstrated
no
significant
synergistic
or
additive
toxicity
growth
parameters
root,
stem,
leaf
lengths
biomass
(fresh
dry
weights).
Both
significantly
reduced
peroxidase
(POD)
activity
in
leaf,
indicating
oxidative
stress
disrupted
antioxidant
defenses.
Notably,
treatment,
mitigated
by
adsorbing
Cu2+
ions,
reducing
their
bioavailability,
limiting
accumulation
tissues.
These
findings
reveal
complex
interaction
between
MPs
agricultural
systems.
While
can
alleviate
its
they
also
compromise
activity,
potentially
affecting
plant
resilience
to
stress.
provides
foundation
for
understanding
metals,
emphasizing
need
further
research
into
long-term
agronomic
impacts.
