Plant Stress,
Год журнала:
2024,
Номер
12, С. 100495 - 100495
Опубликована: Май 20, 2024
Rice
is
the
staple
food
for
more
than
half
of
global
population.
It
cultivated
in
over
100
countries,
and
predominant
Asia,
which
accounts
90%
world's
production.
As
most
crucial
crop
globally,
rice
sensitive
to
both
UVB
radiation
climate
variations.
UltraViolet-B
(UVB)
recognised
as
adverse
factors
photosynthesis
plant
growth.
The
current
study
investigates
resilience
Oryza
sativa
L.
(IR20)
seedlings
irradiation,
focusing
on
parameters
such
photosynthetic
pigment,
total
sugar,
phenolic,
free
amino
acids,
malondialdehyde
content,
hydrogen
peroxide,
antioxidative
enzymes.
mRNA
expression
levels
genes
involved
perception,
signalling,
response
(UVR8,
HY5,
RLCK,
PHT2,
URP)
were
studied
using
quantitative
RT-PCR
(RT-qPCR).
Additionally,
a
computational
approach
was
employed
identify
UVB-responsive
microRNAs
(miRNAs)
their
corresponding
target
mRNAs;
subsequently
validated
stem-loop
RT-qPCR
RT-qPCR,
respectively.
Surprisingly,
it
discovered
that
H2O2
content
IR20
cultivar
increased
despite
no
significant
changes
observed
lipid
peroxidation,
chlorophyll,
phenolic
content.
irradiation
increases
sugar
decreases
entire
acid
while
not
affecting
protein.
analysis
reveals
exposure
augment
related
signal
detection
(UVR8),
signalling
(HY5,
WRKY),
(PHT2,
CA,
URP).
Our
findings
also
suggest
at
post-transcriptional
stage,
miRNAs
expressed
upon
are
responsible
tolerance
radiation.
Overall,
results
reveal
exhibits
promise
candidate
development
varieties
highly
productive
resilient
induced
stress.
International Journal of Molecular Sciences,
Год журнала:
2023,
Номер
24(4), С. 3346 - 3346
Опубликована: Фев. 8, 2023
Radiation
is
widespread
in
nature,
including
ultraviolet
radiation
from
the
sun,
cosmic
and
emitted
by
natural
radionuclides.
Over
years,
increasing
industrialization
of
human
beings
has
brought
about
more
radiation,
such
as
enhanced
UV-B
due
to
ground
ozone
decay,
emission
contamination
nuclear
waste
power
plants
radioactive
material
industry.
With
additional
reaching
plants,
both
negative
effects
damage
cell
membranes,
reduction
photosynthetic
rate
premature
aging
benefits
growth
promotion
stress
resistance
enhancement
have
been
observed.
ROS
(Reactive
oxygen
species)
are
reactive
oxidants
plant
cells,
hydrogen
peroxide
(H2O2),
superoxide
anions
(O2•−)
hydroxide
anion
radicals
(·OH),
which
may
stimulate
antioxidant
system
act
signaling
molecules
regulate
downstream
reactions.
A
number
studies
observed
change
cells
under
new
technology
RNA-seq
molecularly
revealed
regulation
radiative
biological
ROS.
This
review
summarized
recent
progress
on
role
response
radiations
UV,
ion
beam
plasma,
help
reveal
mechanisms
responses
radiation.
International Journal of Molecular Sciences,
Год журнала:
2024,
Номер
25(2), С. 1234 - 1234
Опубликована: Янв. 19, 2024
The
presence
of
the
ozone
hole
increases
amount
UV
radiation
reaching
a
plant's
surface,
and
UV-B
is
an
abiotic
stress
capable
affecting
plant
growth.
Rhododendron
chrysanthum
Pall.
(R.
chrysanthum)
grows
in
alpine
regions,
where
strong
present,
has
been
able
to
adapt
over
long
period
evolution.
We
investigated
response
R.
leaves
using
widely
targeted
metabolomics
transcriptomics.
Although
phytohormones
have
studied
for
many
years
growth
development
adaptation
environmental
stresses,
this
paper
innovative
terms
species
methods
used.
Using
unique
latest
research
methods,
was
add
information
topic
chrysanthum.
treated
grown
simulated
environment,
with
group
M
receiving
no
groups
N
Q
(externally
applied
abscisic
acid
treatment)
2
days
(8
h
per
day).
results
MN
showed
significant
changes
phenolic
accumulation
differential
expression
genes
related
synthesis
after
radiation.
combined
transcriptomics
data
map
metabolic
regulatory
network
acids
under
order
investigate
such
secondary
metabolites
stress.
L-phenylalanine,
L-tyrosine
phenylpyruvic
contents
were
significantly
increased
Simultaneously,
levels
3-hydroxyphenylacetic
acid,
2-phenylethanol,
anthranilate,
2-hydroxycinnamic
3-hydroxycinnamic
α-hydroxycinnamic
2-hydroxy-3-phenylpropanoic
pathway
elevated
In
contrast,
study
NQ
found
that
externally
(ABA)
had
greater
tolerance
radiation,
influence
ABA
also
differences.
1-o-p-coumaroyl-β-d-glucose,
3-(4-hydroxyphenyl)-propionic
3-o-feruloylquinic
ac-id-o-glucoside
external
application
protect
against
Taken
together,
these
studies
three
indicated
can
production
promote
stress,
which
provided
theoretical
reference
its
complex
molecular
mechanism.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Фев. 9, 2024
Abstract
Exposure
of
plants
to
ultraviolet-B
(UV-B)
radiation
initiates
transcriptional
responses
that
modify
metabolism,
physiology
and
development
enhance
viability
in
sunlight.
Many
these
regulatory
UV-B
are
mediated
by
the
photoreceptor
UV
RESISTANCE
LOCUS
8
(UVR8).
Following
photoreception,
UVR8
interacts
directly
with
multiple
proteins
regulate
gene
expression,
but
mechanisms
control
differential
protein
binding
initiate
distinct
unknown.
Here
we
show
is
phosphorylated
at
several
sites
stimulates
phosphorylation
Serine
402.
Site-directed
mutagenesis
mimic
402
promotes
REPRESSOR
OF
PHOTOMORPHOGENESIS
(RUP)
proteins,
which
negatively
action.
Complementation
uvr8
mutant
phosphonull
or
phosphomimetic
variants
suggests
modifies
activity
flavonoid
biosynthesis,
a
key
UV-B-stimulated
response
enhances
plant
protection
crop
nutritional
quality.
This
research
provides
basis
understand
how
differentially
effector
radiation.
Frontiers in Plant Science,
Год журнала:
2025,
Номер
15
Опубликована: Янв. 15, 2025
This
study
aimed
to
screen
the
differentially
expressed
genes
(DEGs)
of
Gossypium
hirsutum
under
UV-B
stress
and
identify
significant
pathways
based
on
gene
enrichment
analysis
results.
In
this
study,
allotetraploid
crop
G.
was
used
examine
changes
in
various
physiological
indexes
stress,
screened
out
all
DEGs
(16
kJ
m-2
d-1)
six
leaf
transcriptomes.
The
main
were
analyzed
according
annotation.
Finally,
we
predicted
regulatory
phenylpropanoid
pathway
by
co-expression
network
analysis,
selected
GhMYB4
for
verification.
Gene
annotation
revealed
that
predominantly
enriched
related
photosynthesis
secondary
metabolism.
Further
impaired
mainly
damaging
photosystem
II
(PSII)
inhibiting
electron
transport,
whereas
responded
synthesizing
metabolites
such
as
anthocyanins
lignin.
We
It
found
be
an
anthocyanin
negative
regulator
response
stress.
