Environmental Pollution,
Год журнала:
2021,
Номер
278, С. 116830 - 116830
Опубликована: Март 9, 2021
Increased
tropospheric
ozone
(O3)
concentrations
in
boreal
forests
affect
the
emission
of
biogenic
volatile
organic
compounds
(BVOCs),
which
play
crucial
roles
biosphere-atmosphere
feedbacks.
Although
it
has
been
well
documented
that
BVOC
emissions
are
altered
response
to
elevated
O3,
consequent
effects
on
carbon
budget
have
largely
unexplored.
Here,
we
studied
O3
(80
nmol
mol−1)
diurnal
variation
and
gas
exchange
CO2
from
above-
belowground
parts
Norway
spruce
(Picea
abies)
Scots
pine
(Pinus
sylvestris)
further
investigated
budget.
In
spring,
decreased
net
photosynthesis
rate
(Pn)
above-ground
both
species.
As
a
causal
relationship
with
dormancy
recovery,
O3-induced
decreases
indicated
inhibition
recovery.
Contrary
spring
results,
summer
aboveground
were
increased
Decreases
Pn
stress.
monoterpene
main
defense
response.
Elevated
had
little
effect
either
species
or
summer.
proportion
emitted
as
BVOCs
relative
assimilated
by
(the
BVOC-C
loss)
at
soil-plant
system
levels
summer,
resulted
CO2–C
loss
level
pine.
During
this
process,
can
represent
significant
fraction
between
atmosphere
spruce,
less
pronounced.
The
current
results
highlight
need
for
prediction
their
contributions
under
Ecology and Evolution,
Год журнала:
2025,
Номер
15(4)
Опубликована: Апрель 1, 2025
In
the
evolutionary
arms
race
between
plants
and
herbivores,
sophisticated
mechanisms
of
indirect
plant
defense
play
a
pivotal
role.
This
study
investigated
role
volatile
organic
compounds
(VOCs)
in
attracting
parasitoid
Ooencyrtus
spp.
to
Aristolochia
contorta,
while
also
providing
insights
into
interactions
among
A.
herbivore
Sericinus
montela,
tritrophic
context.
utilized
field
surveys,
olfactometer
experiments,
Gas
Chromatography-Mass
Spectrometry
(GC-MS)
analysis
investigate
VOCs.
Field
surveys
showed
54.6%
egg
parasitism
rate,
with
quadrats
containing
contorta
larvae
more
than
those
alone.
bioassays,
preferred
leaves
damaged
by
pattern
wheel
simulating
damage,
46.8%
choosing
these
over
undamaged
controls.
Leaves
treated
larval
saliva
were
similarly
attractive,
drawing
48.7%
spp.;
however,
difference
attraction
saliva-treated
untreated
was
not
statistically
significant,
suggesting
may
be
central
attraction.
GC-MS
identified
VOCs
leaves,
including
hexyl
acetate,
cyclohexene,
δ-cadinene,
α-pinene,
β-caryophyllene,
minimal
amounts
exo-isocitral
β-pinene.
Despite
complex
responses,
our
suggests
saliva-induced
do
significantly
boost
finding
implies
that
VOC
response
damage
application
is
multifaceted,
serving
multiple
defensive
functions,
amount
insufficient
substantially
influence
behavior
toward
leaves.
Our
results
emphasize
contorta's
contribute
understanding
ecological
dynamics
within
plant-parasitoid-herbivore
interactions.
Moreover,
findings
suggest
new
avenues
for
exploring
roles
chemical
signals,
highlighting
facilitated
cues
defenses.
Insects,
Год журнала:
2025,
Номер
16(4), С. 425 - 425
Опубликована: Апрель 17, 2025
The
leaffooted
bug,
Leptoglossus
phyllopus
(L.)
(Hemiptera:
Coreidae),
probes
and
feeds
on
tissues
of
many
plant
species,
including
developing
cotton
bolls,
causing
seed
damage
abscission.
Insecticides
are
the
primary
tool
for
managing
bugs,
but
concerns
about
resistance
environmental
harm
highlight
need
alternative
management
strategies.
One
promising
approach
is
using
semiochemicals,
such
as
plant-
insect-produced
volatile
organic
compounds
(VOCs),
to
trap
or
repel
pests.
Insect
herbivores
often
use
plant-produced
VOCs
select
suitable
host
plants
feeding
oviposition.
Field
observations
abundant
adult
bugs
bolls
suggest
that
aggregate
at
sites.
goal
this
study
was
characterize
from
with
without
bug
herbivory
evaluate
how
these
affect
foraging
behavior.
A
portable
dynamic
headspace
sampling
method
used
collect
in
field,
VOC
samples
were
analyzed
gas
chromatography–mass
spectrometry.
Leaffooted
induced
emissions
significant
increases
six
(benzaldehyde,
α-pinene,
β-pinene,
β-myrcene,
p-xylene,
(E)-β-caryophyllene).
Dual-choice
olfactometer
assays
revealed
attracted
damaged
well
being
synthetic
benzaldehyde
α-pinene
individually.
In
contrast,
repelled
by
combination
α-pinene.
These
findings
attractive
could
contribute
development
lures
integrated
pest
management.
Environmental Pollution,
Год журнала:
2021,
Номер
278, С. 116830 - 116830
Опубликована: Март 9, 2021
Increased
tropospheric
ozone
(O3)
concentrations
in
boreal
forests
affect
the
emission
of
biogenic
volatile
organic
compounds
(BVOCs),
which
play
crucial
roles
biosphere-atmosphere
feedbacks.
Although
it
has
been
well
documented
that
BVOC
emissions
are
altered
response
to
elevated
O3,
consequent
effects
on
carbon
budget
have
largely
unexplored.
Here,
we
studied
O3
(80
nmol
mol−1)
diurnal
variation
and
gas
exchange
CO2
from
above-
belowground
parts
Norway
spruce
(Picea
abies)
Scots
pine
(Pinus
sylvestris)
further
investigated
budget.
In
spring,
decreased
net
photosynthesis
rate
(Pn)
above-ground
both
species.
As
a
causal
relationship
with
dormancy
recovery,
O3-induced
decreases
indicated
inhibition
recovery.
Contrary
spring
results,
summer
aboveground
were
increased
Decreases
Pn
stress.
monoterpene
main
defense
response.
Elevated
had
little
effect
either
species
or
summer.
proportion
emitted
as
BVOCs
relative
assimilated
by
(the
BVOC-C
loss)
at
soil-plant
system
levels
summer,
resulted
CO2–C
loss
level
pine.
During
this
process,
can
represent
significant
fraction
between
atmosphere
spruce,
less
pronounced.
The
current
results
highlight
need
for
prediction
their
contributions
under
