Agronomy,
Journal Year:
2024,
Volume and Issue:
14(12), P. 2818 - 2818
Published: Nov. 27, 2024
Recently,
a
large
number
of
pesticides
with
different
chemical
structures
and
modes
action
(MOAs)
have
become
regularly
used
in
agriculture.
They
are
to
control
the
insect
populations
various
crops.
Foliar
application
may
negatively
affect
crop
physiology,
especially
photosynthesis.
However,
sensitivity
particular
crops,
their
primary
secondary
photosynthetic
processes,
insecticide
is
generally
unknown.
Our
study
aimed
evaluate
negative
effects
lambda-cyhalothrin
(λ-CY)
on
photosystem
II
(PSII)
Malva
moschata
(Musk
mallow).
We
fast
chlorophyll
fluorescence
transients
(i.e.,
OJIPs)
OJIP-derived
parameters,
effective
quantum
yield
PSII
(ΦPSII),
induction
curves
non-photochemical
quenching
(NPQ)
spectral
reflectance
indices.
The
recommended
concentration
(0.05
μM)
10
times
higher
(0.5
λ-CY
did
not
cause
any
effect
parameters.
An
overdosed
foliar
(100
than
recommended,
i.e.,
50
led
changes
OJIP
shape;
decrease
performance
index
(PIABS),
maximum
(FV/FM)
electron
transport
(ET0/RC);
an
increase
protective
mechanisms
(unregulated
quenching,
DI0/RC).
These
lasted
only
tens
minutes
after
application,
which
parameters
returned
pre-application
values.
caused
more
rapid
activation
NPQ,
indicating
early
response
stress
PSII.
μM
above
720
nm
indices
that
indicated
λ-CY-induced
stress.
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(28), P. 12542 - 12553
Published: July 5, 2024
Although
exogenous
chemicals
frequently
exhibit
a
biphasic
response
in
regulating
plant
growth,
characterized
by
low-dose
stimulation
and
high-dose
inhibition,
the
underlying
mechanisms
remain
elusive.
This
study
demonstrates,
for
first
time,
compensatory
function
of
rhizosphere
microbiota
assisting
plants
to
withstand
pesticide
stress.
It
was
observed
that
pak
choi
plants,
foliar-spraying
imidacloprid
at
both
low
high
doses,
could
increase
total
number
bacteria
enrich
numerous
beneficial
bacteria.
These
have
capabilities
promoting
growth
degrading
pesticide,
such
as
Nocardioides,
Brevundimonas,
Sphingomonas.
The
bacterial
communities
were
recruited
stressed
through
increasing
release
primary
metabolites
root
exudates,
amino
acids,
fatty
lysophosphatidylcholines.
At
doses
application,
microbial
effect
overcame
stress,
leading
promotion.
However,
with
insufficient
counteract
resulting
inhibition.
findings
pave
way
designing
improved
application
strategies
contribute
better
understanding
how
can
be
used
an
eco-friendly
approach
mitigate
chemical-induced
stress
crops.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(45), P. 17312 - 17323
Published: Oct. 31, 2023
Plants
have
developed
an
adaptive
strategy
for
coping
with
biotic
or
abiotic
stress
by
recruiting
specific
microorganisms
from
the
soil
pool.
Recent
studies
shown
that
foliar
spraying
of
pesticides
causes
oxidative
in
plants
and
leads
to
changes
rhizosphere
microbiota,
but
mechanisms
which
these
microbiota
change
rebuild
remain
unclear.
Herein,
we
provide
first-time
concrete
evidence
rice
respond
application
insecticide
chlorpyrifos
(CP)
enhancing
release
amino
acids,
lipids,
nucleotides
root
exudates,
leading
a
shift
bacterial
community
composition
strong
enrichment
genus
Sphingomonas
sp.
In
order
investigate
underlying
mechanisms,
isolated
representative
isolate
demonstrated
it
is
both
attracted
able
consume
linolenic
acid,
one
exudates
overproduced
after
pesticide
application.
We
further
show
this
strain
selectively
colonizes
roots
treated
alleviates
degrading
CP
releasing
plant-beneficial
metabolites.
These
results
indicate
feedback
loop
between
their
associated
allowing
pesticide-induced
stress.
New Phytologist,
Journal Year:
2023,
Volume and Issue:
240(4), P. 1519 - 1533
Published: Aug. 24, 2023
Summary
Little
is
known
about
how
sex
differences
in
root
zone
characteristics,
such
as
contents
of
allelochemicals
and
soil
microbial
composition,
mediate
intra‐
intersexual
interactions
dioecious
plants.
We
examined
the
processes
mechanisms
sex‐specific
belowground
mediated
by
microorganisms
Populus
cathayana
females
males
replicated
30‐yr‐old
experimental
stands
situ
a
series
controlled
experiments.
Female
roots
released
greater
amount
more
diverse
phenolic
into
environment,
resulting
growth
inhibition
same
neighbors
deterioration
community
microorganisms.
When
grown
with
males,
was
consistently
enhanced,
especially
growth.
Compared
female
monocultures,
presence
reduced
total
accumulation
soil,
shift
from
allelopathic
to
chemical
facilitation.
This
association
enhanced
favorable
bacterial
increased
diversity,
it
induced
changes
orientation
roots.
Our
study
highlighted
novel
mechanism
that
enhances
performance
through
alterations
allelochemical
content
composition.
The
possibility
improve
productivity
mediation
provides
opportunities
for
managing
plantations
