Horticulture Advances,
Journal Year:
2024,
Volume and Issue:
2(1)
Published: Dec. 10, 2024
Abstract
Conventional
breeding
techniques
have
been
effectively
utilized
for
the
enhancement
of
citrus
varieties.
Nonetheless,
traits
such
as
an
extended
juvenile
phase,
cross-
or
self-incompatibility,
high
genetic
heterozygosity,
and
polyembryony
posed
significant
challenges
limitations
to
these
methods.
The
clustered
regularly
interspaced
short
palindromic
repeats
(CRISPR)
genome
editing
has
progressively
emerged
a
vital
tool
research.
This
article
reviews
array
CRISPR/Cas
systems,
emphasizes
recent
advancements
in
using
CRISPR/Cas,
explores
application
this
technology
bolster
resistance
canker.
review
also
covers
development
CRISPR/Cas-mediated
transformation
regeneration
systems
citrus,
alongside
approaches
generating
transgene-free
germplasm.
Moreover,
regulatory
landscape
societal
acceptance
are
examined.
Lastly,
potential
applications
proposed,
with
attention
prospective
challenges.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: July 4, 2023
Citrus
canker
caused
by
Xanthomonas
citri
subsp.
(Xcc)
is
a
destructive
citrus
disease
worldwide.
Generating
disease-resistant
cultivars
the
most
effective,
environmentally
friendly
and
economic
approach
for
control.
However,
traditional
breeding
lengthy
laborious.
Here,
we
develop
transgene-free
canker-resistant
sinensis
lines
in
T0
generation
within
10
months
through
transformation
of
embryogenic
protoplasts
with
Cas12a/crRNA
ribonucleoprotein
to
edit
susceptibility
gene
CsLOB1.
Among
39
regenerated
lines,
38
are
biallelic/homozygous
mutants,
demonstrating
97.4%
mutation
rate.
No
off-target
mutations
detected
edited
lines.
Canker
resistance
cslob1-edited
results
from
both
abolishing
symptoms
inhibiting
Xcc
growth.
The
C.
have
received
regulatory
approval
USDA
APHIS
exempted
EPA
regulation.
This
study
provides
sustainable
efficient
control
solution
presents
an
genome-editing
strategy
other
crops.
Frontiers in Plant Science,
Journal Year:
2024,
Volume and Issue:
14
Published: Jan. 8, 2024
Gene
editing
technologies
have
opened
up
the
possibility
of
manipulating
genome
any
organism
in
a
predicted
way.
CRISPR
technology
is
most
used
tool
and,
agriculture,
it
has
allowed
expansion
possibilities
plant
biotechnology,
such
as
gene
knockout
or
knock-in,
transcriptional
regulation,
epigenetic
modification,
base
editing,
RNA
prime
and
nucleic
acid
probing
detection.
This
mostly
depends
on
New Phytologist,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 1, 2025
Genome
editing
for
the
development
of
improved
varieties
is
supported
by
possibility
segregating
out
editor
T-DNA
cassette
after
genome
in
many
crop
species.
Removal
prevents
potential
continuous
activity
transformed
plant
and
furthermore
facilitates
regulatory
approval.
While
transgene
outcrossing
exogenous
sequences
possible
crops,
this
not
case
vegetatively
propagated
sterile
such
as
Cavendish
bananas.
Therefore,
gene
techniques
leading
to
transgene-free
edited
plants
are
essential
untap
those
crops.
Here,
we
present
a
method
banana
(Musa
spp.)
through
co-editing
strategy.
A
novel
Agrobacterium
tumefaciens-mediated
approach
combining
embryogenesis
chlorsulfuron
selection
was
established
validated
whole
sequencing.
Editing
acetolactate
synthase
(MaALS)
genes
using
base
allows
effective
plants.
Moreover,
plantlets
were
regenerated
with
mutations
at
two
target
sites,
indicating
that
strategy
can
be
used
multiple
genomic
sites.
The
presented
efficient
represents
first
report
Frontiers in Genome Editing,
Journal Year:
2023,
Volume and Issue:
5
Published: July 20, 2023
Increased
understanding
of
plant
genetics
and
the
development
powerful
easier-to-use
gene
editing
tools
over
past
century
have
revolutionized
humankind's
ability
to
deliver
precise
genotypes
in
crops.
Plant
transformation
techniques
are
well
developed
for
making
transgenic
varieties
certain
crops
model
organisms,
yet
reagent
delivery
regeneration
remain
key
bottlenecks
applying
technology
most
Typical
protocols
produce
transgenic,
genetically
modified
(GM)
rely
on
transgenes,
chemical
selection,
tissue
culture.
make
edited
(GE)
also
use
even
though
these
may
be
undesirable
final
crop
product.
In
some
crops,
transgenes
routinely
segregated
away
during
meiosis
by
performing
crosses,
thus
only
a
minor
concern.
other
particularly
those
propagated
vegetatively,
complex
hybrids,
or
with
long
generation
times,
such
crosses
impractical
impossible.
This
review
highlights
diverse
strategies
CRISPR/Cas
reagents
regenerable
cells
recover
plants
without
unwanted
integration
transgenes.
Some
examples
include
delivering
DNA-free
as
ribonucleoproteins
mRNA,
relying
expression
from
non-integrated
DNA,
using
novel
mechanisms
viruses
nanoparticles,
unconventional
selection
methods
avoid
and/or
avoiding
culture
altogether.
These
advancing
rapidly
already
enabling
scientists
precision
CRISPR
tools.
Journal of Experimental Botany,
Journal Year:
2023,
Volume and Issue:
74(15), P. 4349 - 4366
Published: May 19, 2023
Abstract
Gene
expression
plays
a
fundamental
role
in
the
regulation
of
agronomically
important
traits
crop
plants.
The
genetic
manipulation
plant
promoters
through
genome
editing
has
emerged
as
an
effective
strategy
to
create
favorable
crops
by
altering
pattern
pertinent
genes.
Promoter
can
be
applied
directed
manner,
where
nucleotide
sequences
associated
with
are
precisely
generated.
Alternatively,
promoter
also
exploited
random
mutagenic
approach
generate
novel
variations
within
designated
promoter,
from
which
elite
alleles
selected
based
on
their
phenotypic
effects.
Pioneering
studies
have
demonstrated
potential
engineering
well
mining
valuable
for
breeding.
In
this
review,
we
provide
update
application
increased
yield,
enhanced
tolerance
biotic
and
abiotic
stresses,
improved
quality.
We
discuss
several
remaining
technical
bottlenecks
how
may
better
employed
improvement
future.
Frontiers in Plant Science,
Journal Year:
2024,
Volume and Issue:
15
Published: March 26, 2024
Citrus
canker
disease
affects
citrus
production.
This
is
caused
by
Xanthomonas
citri
subsp.
(Xcc).
Previous
studies
confirmed
that
during
Xcc
infection,
PthA4,
a
transcriptional
activator
like
effector
(TALE),
translocated
from
the
pathogen
to
host
plant
cells.
PthA4
binds
binding
elements
(EBEs)
in
promoter
region
of
susceptibility
gene
LOB1
(EBE
-LOBP)
activate
its
expression
and
subsequently
cause
symptoms.
Previously,
Cas12a/CBE
co-editing
method
was
employed
disrupt
EBE
-LOBP
pummelo,
which
highly
homozygous.
However,
most
commercial
cultivars
are
heterozygous
hybrids
more
difficult
generate
homozygous/biallelic
mutants.
Here,
we
edit
Hamlin
(
sinensis
),
hybrid
cultivar
grown
worldwide.
Binary
vector
GFP-p1380N-ttLbCas12a:LOBP1-mPBE:ALS2:ALS1
constructed
shown
be
functional
via
Xcc-facilitated
agroinfiltration
leaves.
construct
allows
selection
transgene-free
regenerants
GFP,
edits
ALS
chlorsulfuron-resistant
as
marker
for
genome
editing
resulting
transient
T-DNA
nCas9-mPBE:ALS2:ALS1,
gene(s)
interest
(i.e.,
this
study)
through
ttLbCas12a,
thus
creating
citrus.
Totally,
77
plantlets
were
produced.
Among
them,
8
transgenic
plants
(#Ham
GFP
1
-
#Ham
8),
4
NoGFP
4),
rest
wild
type.
plantlets,
three
lines
1,
2
3)
contained
biallelic
mutations
pthA4
,
one
line
4)
had
homozygous
.
We
achieved
5.2%
mutation
efficiency
–LOBP
C.
cv.
Hamlin,
compared
1.9%
pummelo
previous
study.
Importantly,
four
3
survived
resistant
against
canker.
Taken
together,
has
been
successfully
used
canker‐resistant
T0
generation
biallelic/homozygous
LOB1.
Molecular Horticulture,
Journal Year:
2023,
Volume and Issue:
3(1)
Published: Jan. 28, 2023
Fruit
crops,
consist
of
climacteric
and
non-climacteric
fruits,
are
the
major
sources
nutrients
fiber
for
human
diet.
Since
2013,
CRISPR/Cas
(Clustered
Regularly
Interspersed
Short
Palindromic
Repeats
CRISPR-Associated
Protein)
genome
editing
system
has
been
widely
employed
in
different
plants,
leading
to
unprecedented
progress
genetic
improvement
many
agronomically
important
fruit
crops.
Here,
we
summarize
latest
advancements
including
efforts
decipher
mechanisms
behind
plant
development
immunity,
We
also
highlight
potential
challenges
improvements
application
tools
optimizing
expression
cassette,
improving
delivery
efficiency
reagents,
increasing
specificity
editing,
transformation
regeneration
system.
In
addition,
propose
perspectives
on
crop
breeding
especially
crops
challenges.
It
is
worth
noting
that
manipulate
with
systems
urgently
needed
demonstration.