Agronomy,
Journal Year:
2023,
Volume and Issue:
13(11), P. 2819 - 2819
Published: Nov. 15, 2023
Lignin
is
an
important
secondary
metabolite
that
maintains
the
mechanical
strength
of
horticultural
plants
and
enhances
their
ability
to
respond
external
environmental
changes
such
as
biotic
abiotic
stresses.
However,
excessive
accumulation
lignin
can
lead
lignification
products,
reducing
taste
quality
nutritional
value.
Therefore,
content
products
needs
be
controlled
at
a
reasonable
level,
studying
regulating
metabolism
very
meaningful
work.
This
article
focuses
on
synthesis,
accumulation,
regulation
in
crops
recent
years,
provides
systematic
analysis
its
molecular
mechanism
application
prospects,
sheds
insights
into
directions
need
further
research
future.
basis
for
proposes
new
ideas
improving
crops.
Horticultural Plant Journal,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
Floral
color
and
scent
are
crucial
for
plant-environment
interactions,
especially
in
reproduction
by
attracting
pollinators
fertilization.
They
also
have
wide
applications
cosmetic,
pharmaceutical,
nutraceutical
industries.
Plant
pigments
typically
classified
as
chlorophylls,
flavonoids,
carotenoids,
betalains,
while
volatile
organic
compounds
(VOCs)
grouped
terpenes,
phenylpropanoids/benzenoids,
fatty
acid
derivatives.
Significant
progresses
been
made
understanding
the
biosynthesis
regulation
of
these
floral
VOCs.
Despite
differences
their
biosynthetic
pathways,
VOCs
biochemically
connected
exhibit
synergistic
interactions
during
flower
development
response
to
biotic
abiotic
stresses,
suggesting
existence
pleiotropic
regulators
or
complex
mechanisms
co-regulating
biosynthesis.
In
this
review,
we
summarize
outline
metabolite
pathways
mainly
integrating
phenylpropanoids/benzenoids.
We
provide
a
series
scenarios
illustrating
coordinated
scent.
Finally,
suggest
areas
future
research.
hope
review
will
spark
interest
research
direction
stimulate
further
studies.
ABSTRACT
Lignified
stone
cell
content
is
one
of
the
critical
factors
affecting
‘Dangshansuli’
fruit
quality.
The
function
MADS‐box
transcription
in
regulating
lignin
biosynthesis
pear
still
less.
In
this
study,
PbMADS49
gene
silencing
inhibited
and
secondary
wall
development
mainly
through
reducing
expression
levels
monomer
polymerisation
key
enzymes
(PbPRX33
PbPRX45).
was
a
transcriptional
repressor
inhibiting
its
by
binding
to
CArG
element
target
promoter.
Combined
with
co‐expression
network
promoter
cis‐acting
analysis,
we
hypothesised
that
positively
regulates
PbPRX33
PbWRKY63
.
effect
homologous
genes
‐
1
2
consistent
,
more
significant
than
This
study
shows
positive
regulator
lignification,
providing
new
insights
into
mechanism
cells.
Horticulture Research,
Journal Year:
2024,
Volume and Issue:
11(5)
Published: March 28, 2024
Abstract
Lignin
accumulation
can
enhance
the
disease
resistance
of
young
tea
shoots
(Camellia
sinensis).
It
also
greatly
reduces
their
tenderness,
which
indirectly
affects
quality
and
yield
tea.
Therefore,
regulation
lignin
biosynthesis
appears
to
be
an
effective
way
balance
tenderness
in
shoots.
In
this
study,
we
identified
a
laccase
gene,
CsLAC17,
that
is
induced
during
reduction
gray
blight
infection
Overexpression
CsLAC17
significantly
increased
content
transgenic
Arabidopsis,
enhancing
decreasing
stem
tenderness.
addition,
found
was
negatively
regulated
by
upstream
CsmiR397a
5′-RLM-RACE,
dual-luciferase
assay,
transient
expression
Interestingly,
inhibited
reduced
accumulation,
resulting
decreased
Arabidopsis.
Furthermore,
overexpression
leaves
directly
confirms
function
CsmiR397a-CsLAC17
module
its
effect
on
resistance.
These
results
suggest
involved
balancing
regulating
biosynthesis.
Current Plant Biology,
Journal Year:
2024,
Volume and Issue:
39, P. 100364 - 100364
Published: June 22, 2024
There
is
strong
interest
in
deciphering
the
gene
regulatory
networks
(GRNs)
that
govern
plant
specialized
metabolism
to
assist
breeding.
Here,
we
investigated
GRN
governing
phenolic
biosynthesis
pathways
from
which
~
8,000
secondary
metabolites
are
derived
plants.
Previously
it
was
established
19
predominantly
expressed
(PEP)
genes
maize
sufficient
explain
>70%
of
metabolic
flux
through
phenylpropanoid,
monolignol,
and
flavonoid
branches
this
pathway.
A
yeast-1-hybrid
(Y1H)
centric
screening
approach
employed
discover
upper
level
(tier
2,
3,
4)
regulators
PEP
genes.
These
were
further
examined
by
co-expression
analyses,
a
subset
protein-DNA
interactions
(PDIs)
validated
vivo
ChIP-qPCR
luciferase
reporter
assays
protoplasts.
This
study
reveals
comprehensive
composed
429
PDIs
exhibits
hubs
with
high
connectivity
cross
hierarchical
regulation
different
The
core
includes
TFs
conserved
other
species
implicated
including
ZmMYB40/53/100,
ZmMADS9,
ZmWD40.1/PAC1.
also
(e.g.,
ZmC3H9,
ZmHB20/79,
ZmNAC103/123,
ZmMYB19/26,
ZmMYBR87,
ZmDOF3,
ZmbZIP67,
ZmTCP30,
ZmbHLH128)
indicate
developmentally
regulated
but
fall
under
control
biotic
abiotic
stress
signals.
Together,
provides
complex
mechanism
has
evolved
coordinately
regulate
many
response
multiple
internal
external
signals
can
guide
efforts
aimed
at
manipulating
levels
plants
towards
targeted
breeding
improvement.
The Plant Journal,
Journal Year:
2024,
Volume and Issue:
120(5), P. 1933 - 1953
Published: Oct. 24, 2024
SUMMARY
Lignification
of
the
cell
wall
in
pear
(
Pyrus
)
fruit
results
formation
stone
cells,
which
affects
texture
and
quality
fruit.
However,
it
is
still
unclear
that
how
different
transcription
factors
(TFs)
work
together
to
coordinate
synthesis
deposition
lignin.
Here,
we
examined
transcriptome
varieties
with
contents
found
a
key
TF
PbAGL7
can
promote
increase
secondary
thicknesses.
In
addition,
facilitate
expression
level
lignin
biosynthesis‐related
genes
accelerate
biosynthesis
Arabidopsis.
did
not
directly
bind
promoters
PbC3H1
PbHCT17
are
crucial
involved
biosynthesis.
On
other
hand,
yeast
two‐hybrid
(Y2H)
library
showed
PbNAC47
PbMYB73
interacted
nucleus.
also
increased
contents,
upregulated
expressions
by
binding
SNBE
AC
elements,
respectively.
Moreover,
form
PbAGL7–PbNAC47–PbMYB73
complex.
This
complex
significantly
activated
levels
promoted
cells
Overall,
our
study
provides
new
insights
into
molecular
mechanism
TFs
coordinately
regulate
extend
knowledge
understand
lignification
plants.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Dec. 28, 2024
Cold
stress,
a
major
abiotic
factor,
positively
modulates
the
synthesis
of
artemisinin
in
Artemisia
annua
and
influences
biosynthesis
other
secondary
metabolites.
To
elucidate
changes
metabolites
under
low-temperature
conditions,
we
conducted
dynamic
transcriptomic
metabolite
quantification
analyses
A.
leaves.
The
accumulation
total
organic
carbon
(TOC)
leaves
cold
stress
provided
ample
precursors
for
synthesis.
Short-term
exposure
to
low
temperature
induced
transient
increase
jasmonic
acid
synthesis,
which
regulates
biosynthetic
pathway,
contributing
accumulation.
Additionally,
transcripts
genes
encoding
key
enzymes
transcription
factors
both
phenylpropanoid
pathways,
including
PAL,
C4H,
ADS,
DBR2,
exhibited
similar
expression
patterns,
suggesting
coordinated
effect
between
these
pathways.
Prolonged
sustained
high
levels
leading
significant
increases
lignin,
flavonoids,
anthocyanin.
Conversely,
final
stage
pathway
is
inhibited
resulting
elevated
dihydroartemisinic
artemisinic
acid.
Collectively,
our
study
provides
insights
into
parallel
transcriptional
regulation
pathways
stress.