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@ARTICLE{Barnkov:889202,
author = {Baránková, Barbora and Lazár, Dušan and Nauš, Jan and
Solovchenko, Alexei and Gorelova, Olga and Baulina, Olga and
Huber, Gregor and Nedbal, Ladislav},
title = {{L}ight absorption and scattering by high light-tolerant,
fast-growing {C}hlorella vulgaris {IPPAS} {C}-1 cells},
journal = {Algal Research},
volume = {49},
issn = {2211-9264},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2021-00112},
pages = {101881 -},
year = {2020},
abstract = {Algal cells are highly complex optical systems that can
dynamically change their structure. Consequently, absorption
and scattering properties of algae change, while the cells
are acclimating to different light conditions or during
growth and division in a cell cycle. This may be
particularly important in algal species that can grow
rapidly under very high-light such as Chlorella vulgaris
IPPAS C-1 that is studied here. From cell transmittance
measured conventionally and using integrating sphere, we
evaluated absorption and scattering coefficients and cross
sections per cell dry weight and chlorophyll content. This
was done for asynchronous cell culture grown in low-light
(LL; 220 μmol (photons) m−2 s−1) or high-light (HL;
1760 μmol (photons) m−2 s−1) light, as well as
during cell cycle of synchronous culture grown in HL. During
the cell cycle, we also determined cell ultrastructural
organization by transmission electron microscopy, and
correlated its parameters with absorption and scattering
cross sections per cell dry weight. We found that the IPPAS
C-1 cells of asynchronous culture scatter light more than
other cells, however, internal organization of the cells
that is decisive for scattering is less sensitive to HL and
LL treatment than the cell pigment content that controls
absorption. The light scattering and absorption were
dynamically changed during cell cycle of synchronous cells
grown in the HL. Changes in ratio of chloroplast to
protoplast area, reflecting amount of scattering chloroplast
membrane (outer, inner) interfaces, best correlated with
changes in light scattering. We suggest that the increased
light scattering by the HL-acclimated IPPAS C-1 cells might
be responsible for increased HL resilience reported in the
literature. Biotechnological aspect of this study is that
the scattering and absorption properties of phytoplankton
cells ought to be calibrated for each particular growth
phase or irradiance to which the cells are acclimated.},
cin = {IBG-2},
ddc = {580},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {2171 - Biological and environmental resources for
sustainable use (POF4-217) / AF AlgalFertilizer -
AlgalFertilizer (20172303)},
pid = {G:(DE-HGF)POF4-2171 / G:(BioSC)20172303},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000540736500015},
doi = {10.1016/j.algal.2020.101881},
url = {https://juser.fz-juelich.de/record/889202},
}