bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 12, 2024
Abstract
Food
choice
is
an
important
driver
of
speciation
and
invasion
novel
ecological
niches.
However,
we
know
little
about
the
mechanisms
leading
to
changes
in
dietary
preference.
Here,
use
three
closely-related
species
Drosophila
sechellia
,
D.
simulans
melanogaster
study
taste
circuit
food
evolution.
sechellia,
a
host
specialist,
feeds
exclusively
on
single
fruit
(
Morinda
citrifolia
noni)
-
latter
two
are
generalists
living
various
substrates.
Using
quantitative
feeding
assays,
recapitulate
preference
for
noni
detect
conserved
sweet
but
altered
bitter
sensitivity
via
calcium
imaging
peripheral
neurons.
Noni
surprisingly
activates
sensing
neurons
more
strongly
due
small
deletion
one
gustatory
receptor.
volumetric
ventral
brain,
show
that
instead
physiology,
species-specific
processing
sugar
signals
sensorimotor
circuits
recapitulates
differences
Our
data
support
receptor
alone
cannot
explain
rather
modifications
how
sensory
information
transformed
into
motor
commands.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Фев. 5, 2024
Abstract
Chemosensory
tissues
exhibit
significant
between-species
variability,
yet
the
evolution
of
gene
expression
and
cell
types
underlying
this
diversity
remain
poorly
understood.
To
address
these
questions,
we
conducted
transcriptomic
analyses
five
chemosensory
from
six
Drosophila
species
integrated
findings
with
single-cell
datasets.
While
stabilizing
selection
predominantly
shapes
transcriptomes,
thousands
genes
in
each
tissue
have
evolved
differences.
Genes
that
changed
one
often
multiple
other
but
at
different
past
epochs
are
more
likely
to
be
type-specific
than
unchanged
genes.
Notably,
chemosensory-related
undergone
widespread
changes,
numerous
species-specific
gains/losses
including
novel
chemoreceptors
patterns.
Sex
differences
also
pervasive,
a
D.
melanogaster-
specific
excess
male-biased
sensory
muscle
cells
its
forelegs.
Together,
our
provide
new
insights
for
understanding
evolutionary
changes
both
global
individual
levels.
Insects,
Год журнала:
2025,
Номер
16(1), С. 84 - 84
Опубликована: Янв. 15, 2025
Drosophila
suzukii
severely
damages
the
production
of
berry
and
stone
fruits
in
large
parts
world.
Unlike
D.
melanogaster,
which
reproduces
on
overripe
fermenting
ground,
prefers
to
lay
its
eggs
ripening
still
plants.
Flies
locate
fruit
hosts
by
their
odorant
volatiles,
are
detected
encoded
a
highly
specialised
olfactory
system
before
being
translated
into
behaviour.
The
exact
information-processing
pathway
is
not
yet
fully
understood,
especially
evaluation
odour
attractiveness.
It
also
unclear
what
differentiates
brains
melanogaster
cause
crucial
difference
host
selection.
We
hypothesised
that
basis
for
different
behaviours
already
formed
at
level
antennal
lobe
neuronal
responses
volatiles
associated
with
ripe
fruit.
thus
investigated
3D
vivo
two-photon
calcium
imaging
how
both
species
odours
from
fruits,
leaves,
fermented
bacteria,
mixtures
lobe.
then
assessed
behavioural
odours.
neural
reflect
species-dependent
shifts
code.
In
addition
this,
morphological
differences
were
observed.
However,
this
was
directly
reflected
tested.
International Journal of Molecular Sciences,
Год журнала:
2024,
Номер
25(19), С. 10441 - 10441
Опубликована: Сен. 27, 2024
The
agricultural
pest
Drosophila
suzukii
exhibits
a
strong
preference
for
feeding
on
fresh
fruits,
demonstrating
high
adaptability
to
sugary
environments.
Meanwhile,
sugar
levels
stimulate
insulin
secretion,
thereby
regulating
the
steady
state
of
metabolism.
Understanding
mechanisms
related
metabolism
in
D.
is
crucial
due
its
adaptation
these
specific
environmental
conditions.
signaling
pathway
an
evolutionarily
conserved
phosphorylation
cascade
with
significant
roles
development
and
We
observed
that
activation
inhibited
FoxO
activity
downregulated
expression
Pepck,
activating
glycolysis
reducing
glucose
levels.
By
contrast,
inhibiting
increased
upregulated
which
activated
gluconeogenesis
led
Our
findings
demonstrated
role
mediating
through
FoxO–Pepck
axis,
supports
ecological
high-sugar
niches,
providing
insights
into
metabolic
control
suggesting
potential
strategies
management.
Elucidating
molecular
processes
important
understanding
regulation
specialization
suzukii.
Environmental Entomology,
Год журнала:
2024,
Номер
53(5), С. 849 - 859
Опубликована: Июль 11, 2024
Avocado
lace
bug,
Pseudocysta
perseae
(Heidemann)
(Hemiptera:
Tingidae),
is
a
sap-feeding
insect
that
feeds
on
the
underside
of
avocado
leaves.
First
observed
in
2019,
P.
has
spread
throughout
Hawaiian
islands,
causing
premature
leaf
drop
and
decrease
yield.
Due
to
Hawai'i's
approximately
200
cultivars
comprised
all
3
races
with
extensive
racial
hybrids,
we
were
able
investigate
whether
certain
more
prone
experiencing
higher
abundances
infestations
compared
others.
We
conducted
longitudinal
abundance
surveys
Hawai'i
Island
across
several
common
varieties
monitoring
changes
abundance.
These
supplemented
infestation
severity
4
lineages
(Mexican,
Guatemalan,
West
Indian,
Guatemalan
×
Indian
hybrid).
Additionally,
collected
leaves
'Sharwil',
'Hass',
'Kahalu'u',
'Nishikawa'
looking
at
associations
between
cultivar,
herbivory-related
biomechanical
traits,
soluble
sugar
content.
found
some
cultivars,
such
as
'Malama',
typically
experience
lower
'Beshore',
'Sharwil'.
hybrid
trees
also
shown
have
probability
severe
other
lineages.
Lastly,
content,
specifically
fructose
had
positive
effect
juvenile
findings
suggest
cultivar
differences
may
exist,
but
tree-to-tree
compositional
differences,
be
large
driver
variation
