Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 18, 2024
Abstract
Light
quality
is
a
crucial
abiotic
environmental
factor
that
influences
the
growth
and
β-carotene
accumulation
on
Dunaliella
salina.
However,
influence
of
primary
photochemical
reactions
D.
salina
physiological
mechanisms
regulating
metabolism
remains
unclear
at
present.
This
study
involved
batch
culture
using
low
light
(40
±
5
μmol
photons
m-2
s-1,
without
inhibiting
photosynthetic
electron
transfer)
provided
by
different
colored
LEDs.
Our
results
indicated
rate,
chlorophyll
a/chlorophyll
b/β-carotene
content
cells
were
higher
under
BL
RL
than
WL
GL.
The
absorption
rates
chloroplasts
in
algae
(22.8%
18.6%,
respectively)
those
GL
(14.0%
10.2%,
respectively),
which
was
attributed
to
reduced
energy
dissipation
increased
efficiency
RL.
enhanced
synthesis
capability
cells.
It
observed
light,
has
little
process
β-carotene.
two
key
genes
degradation
pathway
(LUT5ABA2)
are
significantly
downregulated
both
all-trans
inhibition
conversion
from
all-trans
ABA
biosynthesis
precursor
(9-cis-β-carotene)
more
pronounced
explains
why
D.salina
BL,
while
synthesized
9-cis-β-carotene
