Whole-genome duplication in an algal symbiont bolsters coral heat tolerance
Science Advances,
Journal Year:
2024,
Volume and Issue:
10(29)
Published: July 19, 2024
The
algal
endosymbiont
Durusdinium
trenchii
enhances
the
resilience
of
coral
reefs
under
thermal
stress.
D.
can
live
freely
or
in
endosymbiosis,
and
analysis
genetic
markers
suggests
that
this
species
has
undergone
whole-genome
duplication
(WGD).
However,
evolutionary
mechanisms
underpin
thermotolerance
are
largely
unknown.
Here,
we
present
genome
assemblies
for
two
isolates,
confirm
WGD
these
taxa,
examine
how
selection
shaped
duplicated
regions
using
gene
expression
data.
We
assess
free-living
versus
endosymbiotic
lifestyles
have
contributed
to
retention
divergence
genes,
processes
enhanced
.
Our
combined
results
suggest
lifestyle
is
driver
post-WGD
evolution
,
with
phase
being
most
important,
followed
by
endosymbiosis.
Adaptations
both
likely
enabled
provide
stress
protection
host
coral.
Language: Английский
A decade of dinoflagellate genomics illuminating an enigmatic eukaryote cell
BMC Genomics,
Journal Year:
2024,
Volume and Issue:
25(1)
Published: Oct. 4, 2024
Language: Английский
Symbiodiniaceae
Coral reefs of the world,
Journal Year:
2025,
Volume and Issue:
unknown, P. 9 - 23
Published: Jan. 1, 2025
Nuclear genomes of dinoflagellates reveal evolutionarily conserved pattern of RNA editing relative to stress response
Frontiers in Protistology,
Journal Year:
2024,
Volume and Issue:
2
Published: May 10, 2024
Dinoflagellates
are
a
group
of
diverse
protists
with
complex
genomes
whose
gene
expression
regulation
mechanisms
remain
little
known.
RNA
editing
is
post-transcriptional
regulatory
mechanism
utilized
by
species,
and
has
been
described
primarily
in
the
plastid
mitochondrial
dinoflagellates.
Its
role
nuclear
dinoflagellates
remains
largely
unexplored.
Here,
integrating
genome
transcriptome
data
from
two
dinoflagellate
taxa
comparative
analysis,
we
identified
10,486
69,953
putative
sites
coral
symbiont,
Durusdinium
trenchii
CCMP2556
free-living
bloom-forming
taxon,
Prorocentrum
cordatum
CCMP1329.
We
recovered
all
12
possible
types
edits,
more
edits
representing
transitions
than
transversions.
In
contrast
to
other
eukaryotes,
found
dominance
A-to-T
transversion
non-coding
regions,
many
which
were
condition-specific.
Overall,
implicate
7.5%
D.
genes
13.2%
P.
genes.
Some
(1.5%
more-substantially
62.3%
)
edited
at
significantly
different
frequencies
distinct
growth
conditions.
The
distribution
locations
exhibited
conserved
patterns
between
phylogenetically
distant
species.
Interestingly,
within
untranslated
regions
appear
be
associated
upregulation
response
heat
stress.
These
results
lend
support
hypothesis
that
key
molecular
underpins
Language: Английский
Time-series dynamics in symbiont communities of acroporid corals undergoing cold stress in winter
Marine Ecology Progress Series,
Journal Year:
2024,
Volume and Issue:
749, P. 71 - 85
Published: Oct. 11, 2024
The
bleaching
of
corals
due
to
cold
stress
has
been
seldom
studied
compared
with
events
resulting
from
heat
stress.
In
this
study,
using
a
camera
connected
an
observatory
system,
we
discovered
Acropora
cytherea
-like
coral
colony
that
underwent
in
winter
at
depth
approximately
20
m
Okinawa,
Japan.
This
main
and
8
nearby
colonies
similar
morphological
traits
were
selected
for
their
genetic
lineages
identified.
dynamics
the
symbiont
communities
associated
during
2015
2016
determined
by
metabarcoding.
Bleaching
2015-2016
was
less
severe
than
winters
2013-2014
2014-2015,
water
temperatures
higher
2015-2016.
Analyses
markers
revealed
9
A
.
A.
hyacinthus
species
complexes
multiple
lineages.
symbionts
included
2
major
defining
intragenomic
variants,
C50a
C50c,
which
are
related
Cladocopium
C3.
ratio
genotypes
remained
largely
unaltered
throughout
sampling
period.
Although
changed
continually
bleached
colony,
alterations
not
seasonal
fluctuations
temperature.
study
certain
C3
strains
can
endure
low
suggests
different
within
same
genus
exhibit
physiological
differences.
Language: Английский