Biological
rhythms
are
ubiquitous.
They
can
be
generated
by
circadian
oscillators,
which
produce
daily
in
physiology
and
behavior,
as
well
developmental
oscillators
such
the
segmentation
clock,
periodically
produces
modular
units.
Here,
we
show
that
clock
controls
timing
of
late-stage
floret
development,
or
anthesis,
domesticated
sunflowers.
In
these
plants,
up
to
thousands
individual
florets
tightly
packed
onto
a
capitulum
disk.
While
early
development
occurs
continuously
across
capitula
generate
iconic
spiral
phyllotaxy,
during
anthesis
discrete
ring-like
pseudowhorls
with
hundreds
undergoing
simultaneous
maturation.
We
demonstrate
regulation
floral
organ
growth
effects
light
on
this
process
time-of-day
dependent.
Delays
phase
delay
morning
visits
pollinators,
while
disruption
causes
loss
pseudowhorl
formation
large
reductions
pollinator
visits.
therefore
sunflower
acts
concert
environmental
response
pathways
synchronize
each
day,
generating
spatial
patterns
developing
This
coordinated
mass
release
rewards
at
predictable
times
day
likely
promotes
plant
reproductive
success.
Journal of Integrative Plant Biology,
Год журнала:
2024,
Номер
66(8), С. 1675 - 1687
Опубликована: Июнь 24, 2024
ABSTRACT
AUXIN
RESPONSE
FACTOR
7
(ARF7)‐mediated
auxin
signaling
plays
a
key
role
in
lateral
root
(LR)
development
by
regulating
downstream
LATERAL
ORGAN
BOUNDARIES
DOMAIN
(
LBD
)
transcription
factor
genes,
including
LBD16
,
LBD18
and
LBD29
.
proteins
are
believed
to
regulate
the
of
genes
as
homodimers
or
heterodimers.
However,
whether
forms
dimers
with
other
LR
remains
unknown.
Here,
we
determined
that
Arabidopsis
thaliana
(L.)
Heynh.
MYB
factors
MYB2
MYB108
interact
auxin‐induced
development.
Both
were
induced
an
ARF7‐dependent
manner.
Disruption
fusion
SRDX
domain
severely
affected
formation
ability
induce
By
contrast,
overexpression
resulted
greater
numbers,
except
lbd29
mutant
background.
These
findings
underscore
interdependence
importance
MYB2,
MYB108,
In
addition,
MYB2–LBD29
MYB108–LBD29
complexes
promoted
expression
CUTICLE
DESTRUCTING
1
CDEF1
),
member
GDSL
(Gly‐Asp‐Ser‐Leu)
lipase/esterase
family
involved
summary,
this
study
identified
regulatory
modules
act
ARF7
intricately
control
auxin‐mediated
Cell Reports,
Год журнала:
2025,
Номер
44(3), С. 115414 - 115414
Опубликована: Март 1, 2025
Highlights•Bacillolysin
identified
from
B.
velezensis
SQR9
can
promote
lateral
root
development•Bacillolysin
interacts
with
Arabidopsis
receptor
CEPR2
to
mediate
IAA34-PUCHI
module•Bacillolysin
activates
downstream
LBD33
expression
developmentSummaryLateral
roots
(LRs)
continuously
forage
water
and
nutrients
soil.
In
thaliana,
LR
development
depends
on
a
canonical
auxin
signaling
pathway
involving
the
core
transcription
factors
INDOLE-3-ACETIC
ACIDs
(IAAs)
AUXIN
RESPONSE
FACTORs
(ARFs).
this
study,
we
protein,
bacillolysin,
secreted
by
beneficial
rhizobacterium
Bacillus
SQR9,
that
is
able
stimulate
formation
of
Arabidopsis.
The
protein
kinase
C-TERMINALLY
ENCODED
PEPTIDE
RECEPTOR2
(CEPR2)
bacillolysin
plays
critical
role
in
development.
bacillolysin-regulated
pathway,
transcriptional
repressor
IAA34
PUCHI
activate
LATERAL
ORGAN
BOUNDARIES-DOMAIN33
(LBD33)
expression,
consequently
inducing
This
study
reveals
interkingdom
communication
via
mediates
novel
induce
development.Graphical
abstract
Frontiers in Plant Science,
Год журнала:
2021,
Номер
12
Опубликована: Ноя. 11, 2021
The
plant
root
is
an
important
storage
organ
that
stores
indole-3-acetic
acid
(IAA)
from
the
apical
meristem,
as
well
nitrogen,
which
obtained
external
environment.
IAA
and
nitrogen
act
signaling
molecules
promote
growth
to
obtain
further
resources.
Fluctuations
in
distribution
of
soil
environment
induce
plants
develop
a
set
strategies
effectively
improve
use
efficiency.
Auxin
integrates
information
regarding
nitrate
status
inside
outside
body
reasonably
distribute
resources
sustainably
construct
system.
In
this
review,
we
focus
on
main
factors
involved
process
nitrate-
auxin-mediated
regulation
structure
better
understand
how
system
internal
utilized
modify
architecture.
Plant Cell & Environment,
Год журнала:
2021,
Номер
45(3), С. 969 - 984
Опубликована: Ноя. 20, 2021
Abstract
Rhizosphere
microorganisms
interact
with
plant
roots
by
producing
chemical
signals
that
regulate
root
development.
However,
the
distinct
bioactive
compounds
and
signal
transduction
pathways
remain
to
be
identified.
Here,
we
showed
sesquiterpenes
are
main
volatile
produced
plant‐beneficial
Trichoderma
guizhouense
NJAU4742.
Inhibition
of
sesquiterpene
biosynthesis
eliminated
promoting
effect
this
strain
on
growth,
indicating
its
involvement
in
plant‐fungus
cross‐kingdom
signalling.
Sesquiterpene
component
analysis
identified
cedrene,
a
highly
abundant
NJAU4742,
stimulate
growth
Genetic
auxin
transport
inhibition
TIR1
AFB2
receptors,
IAA14
auxin‐responsive
protein,
ARF7
ARF19
transcription
factors
affected
response
lateral
cedrene.
Moreover,
AUX1
influx
carrier
PIN2
efflux
were
also
found
indispensable
for
cedrene‐induced
formation.
Confocal
imaging
cedrene
expression
pPIN2:PIN2:GFP
pPIN3:PIN3:GFP,
which
might
related
morphology.
These
results
suggested
novel
molecule
from
T.
regulates
development
through
signalling
auxin.
Journal of Integrative Plant Biology,
Год журнала:
2023,
Номер
65(2), С. 343 - 370
Опубликована: Янв. 7, 2023
Abstract
Asymmetric
cell
division
(ACD)
is
a
fundamental
process
that
generates
new
types
during
development
in
eukaryotic
species.
In
plant
development,
post‐embryonic
organogenesis
driven
by
ACD
universal
and
more
important
than
animals,
which
organ
pattern
preset
embryogenesis.
Thus,
provides
powerful
system
to
study
molecular
mechanisms
underlying
ACD.
During
the
past
decade,
tremendous
progress
has
been
made
our
understanding
of
key
components
involved
this
plants.
Here,
we
present
an
overview
how
determined
regulated
multiple
biological
processes
compare
their
conservation
specificity
among
different
model
systems.
We
also
summarize
roles
phytohormones
regulation
Finally,
conclude
with
overarching
paradigms
principles
govern
consider
technologies
can
be
exploited
fill
knowledge
gaps
make
advances
field.
The
crucial
role
of
TIR1-receptor-mediated
gene
transcription
regulation
in
auxin
signaling
has
long
been
established.
In
recent
years,
the
significant
protein
phosphorylation
modifications
signal
transduction
gradually
emerged.
To
further
elucidate
signaling,
a
phosphoproteomic
analysis
conjunction
with
treatment
identified
an
activated
Mitogen-activated
Protein
Kinase
(MAPKKK)
VH1-INTERACTING
(VIK),
which
plays
important
auxin-induced
lateral
root
(LR)
development.
vik
mutant,
LR
development
is
significantly
attenuated.
Further
investigations
show
that
VIK
interacts
separately
positive
regulator
development,
LATERAL
ORGAN
BOUNDARIES-DOMAIN18
(LBD18),
and
negative
emergence,
Ethylene
Responsive
Factor
13
(ERF13).
directly
phosphorylates
stabilizes
factor
LBD18
formation.
meantime,
ERF13
at
Ser168
Ser172
sites,
causing
its
degradation
releasing
repression
by
on
emergence.
summary,
VIK-mediated
regulates
enhancing
stability
inducing
ERF13,
respectively.
Plant and Cell Physiology,
Год журнала:
2020,
Номер
62(1), С. 166 - 177
Опубликована: Ноя. 20, 2020
Abstract
Cadmium
(Cd)
strongly
inhibits
root
growth,
especially
the
formation
of
lateral
roots
(LRs).
The
mechanism
Cd
inhibition
on
LR
in
rice
(Oryza
sativa)
remains
unclear.
In
this
study,
we
found
that
emergence
was
inhibited
significantly
by
1
�M
and
almost
completely
arrested
5
Cd.
suppressed
both
subsequent
development
primordium
(LRP).
By
using
transgenic
expressing
auxin
response
reporters
DR5::GUS
DR5rev::VENUS,
markedly
reduced
levels
stele
LRP.
rapidly
downregulated
expression
efflux
transporter
genes
OsPIN1b,
OsPIN1c
OsPIN9
LRs
a
cultivar
with
null
allele
OsHMA3
(Heavy
Metal
ATPase
3)
more
sensitive
to
than
cultivars
functional
alleles.
Overexpression
greatly
alleviated
inhibitory
effect
Cd,
but
protective
abolished
polar
transport
inhibitor
1-N-naphthylphthalamic
acid.
results
suggest
disrupting
OsPIN-mediated
distribution
LRP
protects
against
toxicity
sequestering
into
vacuoles.
FEBS Journal,
Год журнала:
2021,
Номер
289(7), С. 1731 - 1745
Опубликована: Сен. 20, 2021
Both
auxin
signalling
and
programmed
cell
death
(PCD)
are
essential
components
of
a
normally
functioning
plant.
Auxin
underpins
plant
growth
development,
as
well
regulating
defences
against
environmental
stresses.
PCD,
genetically
controlled
pathway
for
selective
elimination
redundant,
damaged
or
infected
cells,
is
also
key
element
many
developmental
processes
stress
response
mechanisms
in
plants.
An
increasing
body
evidence
suggests
that
PCD
regulation
often
connected.
While
generally
appears
to
suppress
death,
it
has
been
shown
promote
events,
most
likely
via
stimulation
ethylene
biosynthesis.
Intriguingly,
certain
cells
undergoing
have
suggested
control
the
distribution
tissues,
by
either
releasing
burst
creating
an
anatomical
barrier
transport
distribution.
These
recent
findings
indicate
novel
roles
localized
events
context
development
such
root
architecture,
tissue
regeneration
following
injury,
suggest
exciting
possibilities
incorporation
this
knowledge
into
crop
improvement
strategies.