Cell Reports,
Journal Year:
2022,
Volume and Issue:
42(1), P. 111913 - 111913
Published: Dec. 29, 2022
Lateral
root
(LR)
initiation
is
controlled
by
the
pericycle
and
neighboring
endodermis
in
Arabidopsis.
Here,
we
demonstrate
that
UBIQUITIN-SPECIFIC
PROTEASE14/DA3
regulates
LR
modulating
auxin
signaling
endodermis.
DA3
negatively
affects
mRNA
protein
levels
of
AUXIN
RESPONSE
FACTOR7
(ARF7)
ARF19
but
positively
stability
SHORT
HYPOCOTYL
2
(SHY2/IAA3),
an
repressor,
We
show
interacts
with
ARF7
ARF19,
inhibiting
their
binding
to
locus
LATERAL
ORGAN
BOUNDARY
DOMAIN16
(LBD16)
repress
its
expression
pericycle.
SHY2
also
enhances
repressive
effect
on
thus
LBD16
Overall,
our
findings
acts
SHY2,
ARF7,
coordinate
control
Molecular Plant,
Journal Year:
2021,
Volume and Issue:
15(1), P. 86 - 103
Published: Dec. 16, 2021
Optimal
plant
development
requires
root
uptake
of
14
essential
mineral
elements
from
the
soil.
Since
bioavailability
these
nutrients
underlies
large
variation
in
space
and
time,
plants
must
dynamically
adjust
their
architecture
to
optimize
nutrient
access
acquisition.
The
information
on
external
availability
whole-plant
demand
is
translated
into
cellular
signals
that
often
involve
phytohormones
as
intermediates
trigger
a
systemic
or
locally
restricted
developmental
response.
Timing
extent
such
local
responses
depend
overall
nutritional
status
transmitted
shoots
roots
form
other
long-distance
signals.
integration
then
determines
cell
division
elongation
rates
primary
lateral
roots,
initiation,
emergence,
well
formation
hairs.
Here,
we
review
cascades
nutrient-related
sensing
signaling
events
hormones
highlight
nutrient–hormone
relations
coordinate
plasticity
plants.
International Journal of Molecular Sciences,
Journal Year:
2022,
Volume and Issue:
23(4), P. 1933 - 1933
Published: Feb. 9, 2022
The
hormones
auxin
and
cytokinin
regulate
numerous
aspects
of
plant
development
often
act
as
an
antagonistic
hormone
pair.
One
the
more
striking
examples
auxin/cytokinin
antagonism
involves
regulation
shoot/root
growth
ratio
in
which
promotes
shoot
inhibits
root
growth,
whereas
does
opposite.
Control
is
essential
for
survival
terrestrial
plants
because
it
allows
adaptations
to
water
mineral
nutrient
availability
soil.
Because
a
decrease
combined
with
increase
leads
under
drought
stress
limiting
conditions,
was
not
surprising
find
that
promotes,
while
reduces,
tolerance
uptake.
Recent
data
show
also
alter
signaling
biosynthesis
pathways
this
stress-induced
affects
opposite
manner.
These
effects
suggested
each
directly
negatively
regulates
or
other.
However,
growing
body
evidence
supports
unidirectional
regulation,
emerging
primary
regulatory
component.
This
master
role
may
come
surprise
when
viewed
from
evolutionary
perspective.
Current Biology,
Journal Year:
2023,
Volume and Issue:
33(18), P. 3926 - 3941.e5
Published: Sept. 1, 2023
As
a
major
determinant
of
the
nutrient-acquiring
root
surface,
hairs
(RHs)
provide
low-input
strategy
to
enhance
nutrient
uptake.
Although
primary
and
lateral
roots
exhibit
elongation
responses
under
mild
nitrogen
(N)
deficiency,
foraging
response
RHs
underlying
regulatory
mechanisms
remain
elusive.
Employing
transcriptomics
functional
studies
revealed
framework
molecular
components
composing
cascade
auxin
synthesis,
transport,
signaling
that
triggers
RH
for
N
acquisition.
Through
upregulation
Tryptophan
Aminotransferase
Arabidopsis
1
(TAA1)
YUCCA8,
low
increases
accumulation
in
apex.
Auxin
is
then
directed
differentiation
zone
via
transport
machinery,
AUXIN
TRANSPORTER
PROTEIN
(AUX1)
PIN-FORMED
2
(PIN2).
Upon
arrival
zone,
activates
transcription
factors
RESPONSE
FACTOR
6
8
(ARF6/8)
promote
epidermal
auxin-inducible
transcriptional
module
ROOT
HAIR
DEFECTIVE
(RHD6)-LOTUS
JAPONICA
HAIRLESS-LIKE
3
(LRL3)
steer
N.
Our
study
uncovers
spatially
defined
by
RHs,
expanding
mechanistic
hormone-regulated
sensing
plant
roots.
Journal of Experimental Botany,
Journal Year:
2023,
Volume and Issue:
75(6), P. 1714 - 1725
Published: Sept. 15, 2023
Abstract
Phytohormones
are
essential
signalling
molecules
globally
regulating
many
processes
of
plants,
including
their
growth,
development,
and
stress
responses.
The
promotion
growth
the
enhancement
resistance
have
to
be
balanced,
especially
under
adverse
conditions
such
as
drought
stress,
because
limited
resources.
Plants
cope
with
via
various
strategies,
transcriptional
regulation
stress-responsive
genes
adjustment
metabolism,
phytohormones
play
roles
in
these
processes.
Although
abscisic
acid
(ABA)
is
an
important
signal
drought,
less
attention
has
been
paid
other
phytohormones.
In
this
review,
we
summarize
progress
understanding
phytohormone-regulated
primary
metabolism
water-limited
conditions,
Arabidopsis
thaliana,
highlight
recent
findings
concerning
amino
acids
associated
ABA
signalling.
We
also
discuss
how
function
antagonistically
synergistically
order
balance
Agronomy,
Journal Year:
2023,
Volume and Issue:
13(10), P. 2601 - 2601
Published: Oct. 12, 2023
Soil
heavy
metal
pollution
caused
by
human
activities
has
become
one
of
the
most
critical
environmental
issues
with
a
global
concern.
Phytoremediation
is
widely
used
due
to
its
low
cost
and
friendliness.
However,
impact
metals
on
plant
growth
remains
unclear.
This
study
investigated
effects
photosynthetic
activity
Picris
divaricata
Vant.
under
different
cadmium
concentrations
using
hydroponics
cultivation
system.
The
results
showed
that
processes
P.
exhibited
phenomenon
promotion
in
Cd
inhibition
high
concentrations.
Under
medium
concentration
(≤25
μM),
there
was
no
toxicity
terms
growth,
but
inhibited
growth.
Fe
content
leaves
gradually
increased
as
increased;
it
reached
201.8
mg
kg−1
75
μM
Cd.
significant
difference
Mn
between
treatment
control
(p
>
0.05).
contents
carotenoid
ranged
3.06
3.26
mg/g
across
treatments,
showing
differences.
5–75
did
not
directly
affect
photosynthesis
divaricata.
Higher
reduced
stomatal
density
leaves,
resulting
mesophyll
conductance
limitations,
indirectly
affecting
photosynthesis.
These
research
provide
reference
for
evaluating
selecting
tolerant
plants
environmentally
friendly
approaches
remediate
pollution.
