PLANT PHYSIOLOGY,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 12, 2024
Abstract
Oxygen
deficiency
(hypoxia)
occurs
naturally
in
many
developing
plant
tissues
but
can
become
a
major
threat
during
acute
flooding
stress.
Consequently,
plants
as
aerobic
organisms
must
rapidly
acclimate
to
hypoxia
and
the
associated
energy
crisis
ensure
cellular
ultimately
organismal
survival.
In
plants,
oxygen
sensing
is
tightly
linked
with
oxygen-controlled
protein
stability
of
group
VII
ETHYLENE-RESPONSE
FACTORs
(ERFVII),
which,
when
stabilized
under
hypoxia,
act
key
transcriptional
regulators
hypoxia-responsive
genes
(HRGs).
Multiple
signaling
pathways
feed
into
fine-tune
decision-making
First,
ATP
shortage
upon
directly
affects
status
adjusts
anaerobic
metabolism.
Secondly,
altered
redox
homeostasis
leads
reactive
nitrogen
species
(ROS
RNS)
accumulation,
evoking
oxidative
stress
acclimation.
Finally,
phytohormone
ethylene
promotes
improve
acclimation,
while
turn
alter
ethylene,
auxin,
abscisic
acid,
salicylic
jasmonate
guide
development
responses.
this
Update,
we
summarize
current
knowledge
on
how
energy,
redox,
hormone
are
induced
subsequently
integrated
at
molecular
level
stress-tailored
We
show
that
some
HRGs
responsive
changes
independently
status,
propose
an
updated
HRG
list
more
representative
for
marker
gene
expression.
discuss
synergistic
effects
their
phenotypic
consequences
context
both
environmental
developmental
hypoxia.
Plant Biology,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 12, 2024
Abstract
Discontinuous
hydration
and
dehydration
(HD)
cycles
refer
to
controlled
imbibition
followed
by
before
seed
germination.
Here,
we
investigated
whether
the
level
of
HD
affects
physiology
Tabebuia
heterophylla
seeds
seedlings.
Seeds
were
imbibed
for
10
h
(T1;
phase
I
imbibition)
or
35
(T2;
II),
dehydrated,
progressively
rehydrated
one
four
times
(HD
cycles).
Germination
biochemical
parameters
(membrane
integrity;
total
soluble,
reducing,
nonreducing
(NRS)
sugars;
proteins,
amino
acids,
proline,
H
2
O
,
catalase,
ascorbate
peroxidase,
glutathione
reductase
activity)
quantified
at
last
rehydration
step
each
cycle.
Biometric
(including
pigments)
analysed
in
seedlings
60
days
after
T1
led
reduced
germination
greater
plasma
membrane
damage,
higher
enzyme
activity
(catalase
reductase)
accumulation
NRS,
proline
compared
controls
T2
treatment.
Cellular
damage
became
more
severe
with
cycles.
synchronized
regardless
number
also
had
a
priming
effect.
less
content
than
T1.
produced
carotenoid
chlorophyll
T2,
while
from
amounts
osmoprotectants.
benefited
This
suggests
that
physiological
effects
modulate
seedling
plasticity,
depending
on
water
availability,
potentially
promoting
increased
tolerance
recurrent
droughts
will
be
intensified
ongoing
climate
changes.
Frontiers in Plant Science,
Journal Year:
2024,
Volume and Issue:
15
Published: Sept. 19, 2024
Anthropogenic
activities
and
subsequent
global
climate
change
instigate
drastic
crop
productivity
yield
changes.
These
changes
comprise
a
rise
in
the
number
severity
of
plant
stress
factors,
which
can
arise
simultaneously
or
sequentially.
When
abiotic
factors
are
combined,
their
impact
on
plants
is
more
substantial
than
that
singleton
factor.
One
such
alteration
redox
cellular
homeostasis,
which,
turn,
regulate
downstream
stress-responsive
gene
expression
resistance
response.
The
epigenetic
regulation
response
to
varied
an
interesting
phenomenon,
conversely,
be
stable
heritable.
control
combinations
interactions
with
emerging
field
commemorate
management
under
change.
article
highlights
integration
signaling
pathways
regulations
as
pivotal
components
complex
network
responses
against
multi-combinatorial
stresses
across
time
space.
This
review
aims
lay
foundation
for
developing
novel
approaches
mitigate
environmental
productivity,
bridging
gap
between
theoretical
understanding
practical
solutions
face
changing
anthropogenic
disturbances.
PLANT PHYSIOLOGY,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 12, 2024
Abstract
Oxygen
deficiency
(hypoxia)
occurs
naturally
in
many
developing
plant
tissues
but
can
become
a
major
threat
during
acute
flooding
stress.
Consequently,
plants
as
aerobic
organisms
must
rapidly
acclimate
to
hypoxia
and
the
associated
energy
crisis
ensure
cellular
ultimately
organismal
survival.
In
plants,
oxygen
sensing
is
tightly
linked
with
oxygen-controlled
protein
stability
of
group
VII
ETHYLENE-RESPONSE
FACTORs
(ERFVII),
which,
when
stabilized
under
hypoxia,
act
key
transcriptional
regulators
hypoxia-responsive
genes
(HRGs).
Multiple
signaling
pathways
feed
into
fine-tune
decision-making
First,
ATP
shortage
upon
directly
affects
status
adjusts
anaerobic
metabolism.
Secondly,
altered
redox
homeostasis
leads
reactive
nitrogen
species
(ROS
RNS)
accumulation,
evoking
oxidative
stress
acclimation.
Finally,
phytohormone
ethylene
promotes
improve
acclimation,
while
turn
alter
ethylene,
auxin,
abscisic
acid,
salicylic
jasmonate
guide
development
responses.
this
Update,
we
summarize
current
knowledge
on
how
energy,
redox,
hormone
are
induced
subsequently
integrated
at
molecular
level
stress-tailored
We
show
that
some
HRGs
responsive
changes
independently
status,
propose
an
updated
HRG
list
more
representative
for
marker
gene
expression.
discuss
synergistic
effects
their
phenotypic
consequences
context
both
environmental
developmental
hypoxia.
