Environment International,
Journal Year:
2023,
Volume and Issue:
183, P. 108393 - 108393
Published: Dec. 17, 2023
Microplastics
(MPs)
pollution
is
becoming
an
emerging
global
stressor
for
soil
ecosystems.
However,
studies
on
the
impacts
of
biodegradable
MPs
C
sequestration
have
been
mainly
based
bulk
quantity,
without
considering
storage
form
C,
its
persistency
and
N
demand.
To
address
this
issue,
common
poly
(butylene
adipate-co-terephthalate)
(PBAT)
was
used
as
model,
effects
functional
organic
pools,
including
mineral-associated
(MAOM),
particulate
(POM)
dissolved
matter
(DOM),
were
investigated
from
novel
coupled
perspective
stocks.
After
adding
PBAT-MPs,
contents
POM-C,
DOM-C,
MAOM-C
increased
by
546.9%-697.8%,
54.2%-90.3%,
13.7%-18.9%,
respectively.
Accordingly,
total
116.0%-191.1%.
Structural
equation
modeling
showed
that
pools
regulated
PBAT
input
microbial
metabolism
associated
with
enzymes.
Specifically,
debris
could
be
disguised
to
promote
POM
formation,
which
main
pathway
accumulation.
Inversely,
DOM-C
formation
attributed
product
selective
consumption
in
DOM-N.
Random
forest
model
confirmed
N-activated
(e.g.,
Nitrospirae)
PBAT-degrading
bacteria
Gemmatinadetes)
important
taxa
accumulation,
key
enzymes
rhizopus
oryzae
lipas,
invertase,
ammonia
monooxygenase.
The
accumulation
related
oligotrophic
Chloroflexi
Ascomycota)
aggregate
decreasing
DOM-N
46.9%-84.3%,
but
did
not
significantly
change
other
pools.
Collectively,
findings
highlight
urgency
control
nutrient
imbalance
risk
labile
loss
recalcitrant
enrichment
avoid
depressed
turnover
rate
MPs-polluted
soil.
Global Change Biology,
Journal Year:
2024,
Volume and Issue:
30(7)
Published: July 1, 2024
Abstract
Microplastic
(MP)
pollution
likely
affects
global
soil
carbon
(C)
dynamics,
yet
it
remains
uncertain
how
and
to
what
extent
MP
influences
respiration.
Here,
we
report
on
a
meta‐analysis
determine
the
effects
of
microbiome
CO
2
emission.
We
found
that
significantly
increased
contents
organic
C
(SOC)
(21%)
dissolved
(DOC)
(12%),
activity
fluorescein
diacetate
hydrolase
(FDAse)
(10%),
microbial
biomass
(17%),
but
led
decrease
in
diversity
(3%).
In
particular,
increases
components
further
promote
emission
(25%)
from
soil,
with
much
higher
effect
MPs
these
emissions
than
biomass.
The
could
be
attributed
opposite
vs.
diversity,
as
accumulation
recruited
some
functionally
important
bacteria
provided
additional
substrates
for
specific
heterotrophic
microorganisms,
while
inhibiting
growth
autotrophic
taxa
(e.g.,
Chloroflexi
,
Cyanobacteria
).
This
study
reveals
can
increase
by
causing
shifts
microbiome.
These
results
underscore
potential
importance
plastic
terrestrial
fluxes,
thus
climate
feedbacks.
Frontiers in Microbiology,
Journal Year:
2023,
Volume and Issue:
14
Published: Feb. 20, 2023
Soil
salinization
is
a
serious
abiotic
stress
for
grapevines.
The
rhizosphere
microbiota
of
plants
can
help
counter
the
negative
effects
caused
by
salt
stress,
but
distinction
between
microbes
salt-tolerant
and
salt-sensitive
varieties
remains
unclear.This
study
employed
metagenomic
sequencing
to
explore
microbial
community
grapevine
rootstocks
101-14
(salt
tolerant)
5BB
sensitive)
with
or
without
stress.Compared
control
(treated
ddH2O),
induced
greater
changes
in
than
that
5BB.
relative
abundances
more
plant
growth-promoting
bacteria,
including
Planctomycetes,
Bacteroidetes,
Verrucomicrobia,
Cyanobacteria,
Gemmatimonadetes,
Chloroflexi,
Firmicutes,
were
increased
under
whereas
only
four
phyla
(Actinobacteria,
Cyanobacteria)
while
those
three
(Acidobacteria,
Firmicutes)
depleted.
differentially
enriched
functions
(KEGG
level
2)
mainly
associated
pathways
related
cell
motility;
folding,
sorting,
degradation
functions;
glycan
biosynthesis
metabolism;
xenobiotics
biodegradation
metabolism
cofactors
vitamins,
translation
function
was
Under
differed
greatly,
especially
metabolism.
Further
analysis
revealed
sulfur
glutathione
as
well
bacterial
chemotaxis
uniquely
therefore
might
play
vital
roles
mitigation
on
In
addition,
abundance
various
cycle-related
genes,
genes
involved
assimilatory
sulfate
reduction
(cysNC,
cysQ,
sat,
sir),
(fsr),
SOX
systems
(soxB),
oxidation
(sqr),
organic
transformation
(tpa,
mdh,
gdh,
betC),
significantly
after
treatment
NaCl;
these
mitigate
harmful
grapevine.
short,
findings
indicate
both
composition
contribute
enhanced
tolerance
some
grapevines
stress.
