Frontiers in Plant Science,
Journal Year:
2023,
Volume and Issue:
14
Published: March 24, 2023
This
experiment
investigated
the
changes
of
rhizosphere
soil
microenvironment
for
hyperaccumulation-soil
system
under
Cd
stress
in
order
to
reveal
mechanism
hyperaccumulation
and
tolerance.
Thus,
fractions,
chemical
compositions,
biochemical
characteristics
Siegesbeckia
orientalis
L.
conditions
0,
5,
10,
25,
50,
100,
150
mg
kg-1
were
through
a
root
bag
experiment,
respectively.
As
result,
induced
acidification
S.
soil,
promoted
accumulation
dissolved
organic
carbon
(DOC)
readily
oxidizable
(ROC),
which
increased
by
28.39%
6.98%
at
maximum
compared
with
control.
The
percentage
labile
(acid-soluble
reducible
Cd)
solution
significantly
(P
<
0.05)
from
31.87%
64.60%
26.00%
34.49%,
In
addition,
can
alleviate
inhibition
on
microorganisms
enzymes
compare
bulk
soils.
Under
medium
low
concentrations
Cd,
microbial
biomass
(MBC),
basal
respiration,
ammonification
nitrification
0.05),
activities
key
not
inhibited.
suggests
that
pH
reduction
(DOC
ROC)
increase
bioavailability
may
have
contributed
orientalis.
Moreover,
soils
enhance
tolerance
alleviating
nutrient
imbalance
toxicity
caused
pollution.
study
revealed
physicochemical
properties
stress.
Rhizosphere
are
factors
promoting
activation,
responses
Plant Cell & Environment,
Journal Year:
2023,
Volume and Issue:
46(12), P. 3919 - 3932
Published: Sept. 7, 2023
Abstract
Traditionally,
fine
roots
were
grouped
using
arbitrary
size
categories,
rarely
capturing
the
heterogeneity
in
physiology,
morphology
and
functionality
among
different
root
orders.
Fine
with
functional
roles
are
separated
microbiome‐focused
studies
may
result
confounding
microbial
signals
host‐filtering
across
microbiome
compartments.
Using
a
26‐year‐old
common
garden,
we
sampled
from
four
temperate
tree
species
that
varied
sorted
them
into
absorptive
transportive
roots.
The
rhizoplane
rhizosphere
characterized
16S
rRNA
gene
internal
transcribed
spacer
region
amplicon
sequencing
shotgun
metagenomics
for
to
identify
potential
functions.
subject
metabolomics
spatially
characterize
resource
availability.
Both
fungi
bacteria
differed
according
type.
We
observed
additional
differences
between
bacterial
compartments
but
not
Rhizoplane
bacteria,
as
well
metabolome
functions,
roots,
bacteria.
Functional
driven
by
sugar
transport,
peptidases
urea
transport.
Our
data
highlights
importance
of
function
when
examining
root‐microbial
relationships,
emphasizing
host
selective
pressures
imparted
on
Frontiers in Environmental Science,
Journal Year:
2023,
Volume and Issue:
10
Published: Jan. 4, 2023
Root
exudates
are
carriers
for
the
transfer
of
material,
energy
and
information
between
plant
roots
soils.
Plants
encountering
environmental
stresses
such
as
heavy
metal
pollution
adapt
to
environment
by
producing
secreting
root
exudates.
In
this
study,
laboratory
soil
culture
experiment
pot
with
Sedum
plumbizincicola
were
used
study
effects
single
combined
application
three
exudates,
citric
acid,
glycine,
fructose,
on
Cd-activation
phytoremediation
Cd-contaminated
paddy
soil.
Results
from
showed
that
all
significantly
activated
Cd
in
presented
increased
content
diethylenetriamine
pentaacetic
acid
extracted
(DTPA-Cd).
Particular,
(SC)
at
a
relatively
low
concentration
(2
mmol/kg)
exhibited
best
activation
efficiency
increasing
DTPA-Cd
66.12%.
For
combination
glycine
(SC
+
G,
1:3)
had
effect
experiment,
both
concentrate
(1
(1:1)
reduced
total
biomass
S.
;
thus,
42.33%
35.61%.
The
results
suggest
plays
crucial
role
or
applications
glycine.
However,
mechanisms
under
synergetic
interaction
require
further
investigation.
Toxics,
Journal Year:
2023,
Volume and Issue:
11(3), P. 249 - 249
Published: March 7, 2023
The
widespread
use
of
wood
preservatives,
such
as
chromated
copper
arsenate
(CCA),
alkaline
quaternary
(ACQ),
and
azole
(CA),
may
cause
environmental
pollution
problems.
Comparative
studies
on
the
effect
CCA-,
ACQ-,
CA-treated
soil
contamination
are
rarely
reported,
behavior
metal(loid)
speciation
affected
by
preservatives
has
been
poorly
understood.
Soils
under
boardwalks
were
collected
to
investigate
distribution
at
Jiuzhaigou
World
Natural
Heritage
site.
results
showed
that
maximum
mean
concentrations
Cr,
As,
Cu
found
in
soils
CCA,
CCA
plus
CA
treatments
reached
133.60,
314.90,
266.35
mg/kg,
respectively.
within
a
depth
above
10
cm
was
high
for
all
types
limited
horizontal
direction,
not
exceeding
0.5
m.
mainly
present
residual
fractions
profiles
increased
with
depth.
proportion
non-residual
As
CCA-
CA-treatment
exchangeable
CA-
significantly
higher
than
those
other
preservative
treatments.
migration
influenced
treatment
trestles,
in-service
time
properties
(e.g.,
organic
matter
content),
geological
disasters
debris
flow),
elemental
geochemical
behavior.
With
trestles
successively
replaced
ACQ
treatments,
contaminants
reduced
from
complex
single
type
Cu,
achieving
reduction
total
metal
content,
toxicity,
mobility,
biological
effectiveness,
thus
reducing
risks.
