Chemosphere,
Journal Year:
2024,
Volume and Issue:
356, P. 141789 - 141789
Published: March 28, 2024
Since
nanoparticles
(NPs),
either
released
from
household
wastes
or
applied
directly
to
plants
as
agrochemicals,
can
accumulate
in
the
rhizosphere,
it
is
imperative
understand
how
plant
secondary
metabolism
affected
when
roots
of
an
intact
are
exposed
NPs.
Here,
effects
Pd,
Au,
ZnO
and
Fe2O3
NPs
on
were
comprehensively
investigated
by
analyzing
41
major
metabolites
using
ultra-performance
liquid
chromatography
coupled
with
photodiode
array,
fluorescence
detector
high-resolution
mass
spectrometry
(UPLC-PDA-FLR-HRMS)
Hypericum
perforatum
L
float
seedlings.
The
results
showed
that
exposure
H.
rapidly
led
fluctuations
levels
metabolites.
Although
these
did
not
correlate
NP
type,
concentration
duration
treatment,
a
total
22
compounds
significantly
altered
tested.
In
particular,
1
ppm
Au
increased
content
quercetin
3-(2″-acetylgalactoside)
5.02-fold,
cadensin
G
2.15-fold
leutoskyrin
2.58-fold
after
24
h,
25
Pd
2.1-fold
increase
miquelianin
6
50
furohyperforin
(3.09-fold),
while
decreased
5.22-fold
h
2.13-fold
hypericin
48
h.
These
emphasise
need
intricate
interplay
between
nanomaterials
order
enable
safer
efficient
applications
only
agriculture
but
also
regard
environmental
pollution
Journal of Agricultural and Food Chemistry,
Journal Year:
2024,
Volume and Issue:
72(37), P. 20343 - 20353
Published: Sept. 3, 2024
Based
on
the
modified
cross-linking
of
degradable
natural
polymers
chitosan
oligosaccharides
(COS)
and
gelatin
(GEL)
via
introduction
a
functional
bridge
3,3'-dithiodipropionic
acid,
this
study
constructed
an
environmentally
responsive
dinotefuran
(DNF)
delivery
system
(DNF@COS-SS-GEL).
The
disulfide
bond
(-S-S-)
endowed
DNF@COS-SS-GEL
with
redox-responsive
properties,
allowing
for
rapid
release
pesticides
when
stimulated
by
glutathione
(GSH)
in
simulated
insect.
Compared
commercial
DNF
suspension
concentrate
(DNF-SC),
showed
superior
wet
spreading
retention
performance
cabbage
leaves
reduced
contact
angle
(57°)
at
180
s
4-fold
increased
capacity
after
rainfall
washout.
Nanoencapsulation
effectively
improved
UV-photostability
only
31.4%
decomposition
rate
96
h.
small
scale
large
specific
surface
area
resulted
excellent
uptake
transportation
properties
plants
as
well
higher
bioactivity
against
Nanomaterials,
Journal Year:
2023,
Volume and Issue:
13(11), P. 1736 - 1736
Published: May 25, 2023
In
the
context
of
widespread
distribution
zero
valent
iron
nanoparticles
(nZVI)
in
environment
and
its
possible
exposure
to
many
aquatic
terrestrial
organisms,
this
study
investigates
effects,
uptake,
bioaccumulation,
localisation
transformations
nZVI
two
different
forms
(aqueous
dispersion—Nanofer
25S
air-stable
powder—Nanofer
STAR)
a
model
plant—Arabidopsis
thaliana.
Seedlings
exposed
Nanofer
STAR
displayed
symptoms
toxicity,
including
chlorosis
reduced
growth.
At
tissue
cellular
level,
induced
strong
accumulation
Fe
root
intercellular
spaces
Fe-rich
granules
pollen
grains.
did
not
undergo
any
during
7
days
incubation,
while
25S,
three
behaviours
were
observed:
(i)
stability,
(ii)
partial
dissolution
(iii)
agglomeration
process.
The
size
distributions
obtained
by
SP-ICP-MS/MS
demonstrated
that
regardless
type
used,
was
taken
up
accumulated
plant,
mainly
form
intact
nanoparticles.
agglomerates
created
growth
medium
case
plant.
Taken
together,
results
indicate
Arabidopsis
plants
do
take
up,
transport
accumulate
all
parts
plants,
seeds,
which
will
provide
better
understanding
behaviour
once
released
into
environment,
critical
issue
from
point
view
food
safety.
Chemosphere,
Journal Year:
2024,
Volume and Issue:
356, P. 141789 - 141789
Published: March 28, 2024
Since
nanoparticles
(NPs),
either
released
from
household
wastes
or
applied
directly
to
plants
as
agrochemicals,
can
accumulate
in
the
rhizosphere,
it
is
imperative
understand
how
plant
secondary
metabolism
affected
when
roots
of
an
intact
are
exposed
NPs.
Here,
effects
Pd,
Au,
ZnO
and
Fe2O3
NPs
on
were
comprehensively
investigated
by
analyzing
41
major
metabolites
using
ultra-performance
liquid
chromatography
coupled
with
photodiode
array,
fluorescence
detector
high-resolution
mass
spectrometry
(UPLC-PDA-FLR-HRMS)
Hypericum
perforatum
L
float
seedlings.
The
results
showed
that
exposure
H.
rapidly
led
fluctuations
levels
metabolites.
Although
these
did
not
correlate
NP
type,
concentration
duration
treatment,
a
total
22
compounds
significantly
altered
tested.
In
particular,
1
ppm
Au
increased
content
quercetin
3-(2″-acetylgalactoside)
5.02-fold,
cadensin
G
2.15-fold
leutoskyrin
2.58-fold
after
24
h,
25
Pd
2.1-fold
increase
miquelianin
6
50
furohyperforin
(3.09-fold),
while
decreased
5.22-fold
h
2.13-fold
hypericin
48
h.
These
emphasise
need
intricate
interplay
between
nanomaterials
order
enable
safer
efficient
applications
only
agriculture
but
also
regard
environmental
pollution
