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@ARTICLE{Solovchenko:872659,
author = {Solovchenko, Alexei and Khozin-Goldberg, Inna and Selyakh,
Irina and Semenova, Larisa and Ismagulova, Tatiana and
Lukyanov, Alexandr and Mamedov, Ilgar and Vinogradova,
Elizaveta and Karpova, Olga and Konyukhov, Ivan and
Vasilieva, Svetlana and Mojzes, Peter and Dijkema, Cor and
Vecherskaya, Margarita and Zvyagin, Ivan and Nedbal,
Ladislav and Gorelova, Olga},
title = {{P}hosphorus starvation and luxury uptake in green
microalgae revisited},
journal = {Algal Research},
volume = {43},
issn = {2211-9264},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2020-00150},
pages = {101651 -},
year = {2019},
abstract = {Phosphorus (P) is central to storing and transferring
energy and information in living cells, including those of
microalgae. Many microalgal species dwelling in low P
environments are naturally equipped to take up and store P
whenever it becomes available through a complex phenomenon
known as “luxury P uptake.” Its research is required for
better understanding of the nutrient geochemical cycles in
aquatic environments but also for biotechnological
applications such as sequestration of nutrients from
wastewater and production of algal fertilizers. Here, we
report on our recent insights into luxury P uptake and
polyphosphate formation originating from physiological,
ultrastructural, and transcriptomic evidence. The cultures
pre-starved of P and re-fed with inorganic phosphate (Pi)
exhibited a bi-phasic kinetics of Pi uptake comprising fast
(1–2 h after re-feeding) and slow (1–3 d after
re-feeding) phases. The rate of Pi uptake in the fast phase
was ca. 10 times higher than in the slow phase with an
opposite trend shown for the cell division rate. The
transient peak of polyphosphate accumulation was determined
2–4 h after re-feeding and coincided with the period of
slow cell division and fast Pi uptake. In this phase, the
microalgal cells reached the highest P content (up to $5\%$
of dry cell weight). The P re-feeding also reversed the
characteristic changes in cell lipids induced by P
starvation, namely increase in the major membrane glycolipid
(DGDG/MGDG) ratio and betaine lipids. These changes were
reversed upon Pi re-feeding of the starved culture. Electron
microscopy revealed the ordered organization of vacuolar
polyphosphate indicative of the possible involvement of an
enzyme (complex) in their synthesis. A candidate gene
encoding a protein similar to the vacuolar transport
chaperone (VTC) protein, featuring an expression pattern
corresponding to polyphosphate accumulation, was revealed.
Implications of the findings for efficient biocapture of
phosphorus are discussed.},
cin = {IBG-2},
ddc = {580},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {582 - Plant Science (POF3-582)},
pid = {G:(DE-HGF)POF3-582},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000489307800025},
doi = {10.1016/j.algal.2019.101651},
url = {https://juser.fz-juelich.de/record/872659},
}