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@MASTERSTHESIS{Robertz:1018978,
author = {Robertz, Stefan and Reinecke-Levi, Diana},
othercontributors = {Janzik, Ingar},
title = {{C}haracterization of {C}hlorellales cell walls –
{S}patio-temporal refined biochemical and morphological
characterization of {C}hlorella sorokinianaand vulgaris, and
{P}arachlorella kessleri},
school = {Fachhochschule Aachen},
type = {Masterarbeit},
publisher = {Fachhochschule Aachen},
reportid = {FZJ-2023-05047},
pages = {109 p.},
year = {2021},
note = {Masterarbeit, Fachhochschule Aachen, 2021},
abstract = {Microalgae of the family Chlorellaceae are of special
interest to the food, feed, and nutraceutical industry, due
to their high content of valuable nutrients. However, the
bioaccessibility is limited by the rigid and polymorph cell
wall of these species. This work aimed to characterize the
cell walls of three Chlorellaceae strains in-vivo and
in-vitro under industry-related culturing conditions.
Histochemical staining and detailed analyses of cell wall
monosaccharide composition identified changes in the
composition during cell maturation in Chlorella sorokiniana
SAG 211-8k, Chlorella vulgaris SAG 211-11b and Parachlorella
kessleri SAG 211-11g. The cell walls of C. sorokiniana and
P. kessleri developed a higher hemicellulose content
(defined as susceptible to 2 mol/L trifluoroacetic acid
hydrolysis) with stable amounts of the recalcitrance
components (susceptible to 6 mol/L HCl). In contrast, the
cell wall of C. vulgaris incorporated increasingly
recalcitrance components and developed higher
robustness.Additionally, a novel endogenous cell-wall-lytic
enzyme (autologous Autolysin) was extracted from C.
sorokiniana and P. kessleri. It showed endo-β-1,3-Glucanase
activity, and partial autologous cell wall degradation in
both strains. Thus, presenting a first step towards more
effective methods for increased bioaccessibility, protoplast
formation and genetic manipulation of Chlorellaceae
strains.},
cin = {IBG-2},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {2171 - Biological and environmental resources for
sustainable use (POF4-217)},
pid = {G:(DE-HGF)POF4-2171},
typ = {PUB:(DE-HGF)19},
doi = {10.34734/FZJ-2023-05047},
url = {https://juser.fz-juelich.de/record/1018978},
}