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Statements

Subject Item
n2:RIV%2F67179843%3A_____%2F12%3A00382914%21RIV13-MSM-67179843
rdf:type
n8:Vysledek skos:Concept
dcterms:description
The unicellular, nitrogen fixing cyanobacteriumCyanothecesp. ATCC51142 is of a remarkable potential for production of third-generation biofuels. As the biotechnological potential of Cyanothece51142 varies with the time of the day, we argue that it will, similarly, depend on the phase of the culturegrowth. Here, we study the batchculturedynamics to discover the dominant constraints in the individual growth phases and identify potential for inducing or delaying transitions between culturegrowth phases in Cyanothece51142. We found that specific growth rate in the exponential phase of the culture is much less dependent on incident irradiance than the photosynthetic activity. We propose that surplus electrons that are released by water splitting are used in futile processes providing photoprotection additional to non-photochemical quenching. We confirm that the transition from exponential to linear phase is caused by a light limitation and the transition from linear to stationary phase by nitrogen limitation. We observe spontaneous diurnal metabolic oscillations in stationary phase culture that are synchronized over the entire culture without an external clue. We tentatively propose that the self-synchronization of the metabolic oscillations is due to a cell-to-cell communication of the cyanobacteria that is necessary for nitrogenase activity in nitrate depleted medium. The unicellular, nitrogen fixing cyanobacteriumCyanothecesp. ATCC51142 is of a remarkable potential for production of third-generation biofuels. As the biotechnological potential of Cyanothece51142 varies with the time of the day, we argue that it will, similarly, depend on the phase of the culturegrowth. Here, we study the batchculturedynamics to discover the dominant constraints in the individual growth phases and identify potential for inducing or delaying transitions between culturegrowth phases in Cyanothece51142. We found that specific growth rate in the exponential phase of the culture is much less dependent on incident irradiance than the photosynthetic activity. We propose that surplus electrons that are released by water splitting are used in futile processes providing photoprotection additional to non-photochemical quenching. We confirm that the transition from exponential to linear phase is caused by a light limitation and the transition from linear to stationary phase by nitrogen limitation. We observe spontaneous diurnal metabolic oscillations in stationary phase culture that are synchronized over the entire culture without an external clue. We tentatively propose that the self-synchronization of the metabolic oscillations is due to a cell-to-cell communication of the cyanobacteria that is necessary for nitrogenase activity in nitrate depleted medium.
dcterms:title
On the dynamics and constraints of batch culture growth of the cyanobacterium Cyanothece sp. ATCC 51142 On the dynamics and constraints of batch culture growth of the cyanobacterium Cyanothece sp. ATCC 51142
skos:prefLabel
On the dynamics and constraints of batch culture growth of the cyanobacterium Cyanothece sp. ATCC 51142 On the dynamics and constraints of batch culture growth of the cyanobacterium Cyanothece sp. ATCC 51142
skos:notation
RIV/67179843:_____/12:00382914!RIV13-MSM-67179843
n8:predkladatel
n13:ico%3A67179843
n4:aktivita
n12:P
n4:aktivity
P(ED1.1.00/02.0073)
n4:cisloPeriodika
1
n4:dodaniDat
n6:2013
n4:domaciTvurceVysledku
n10:4419715 n10:3910830 Sinětova, Maria A. n10:3211088
n4:druhVysledku
n9:J
n4:duvernostUdaju
n15:S
n4:entitaPredkladatele
n17:predkladatel
n4:idSjednocenehoVysledku
156386
n4:idVysledku
RIV/67179843:_____/12:00382914
n4:jazykVysledku
n7:eng
n4:klicovaSlova
growth limitation; photoprotection; oscillations; Nitrogen fixation; microbial communication
n4:klicoveSlovo
n11:oscillations n11:growth%20limitation n11:Nitrogen%20fixation n11:microbial%20communication n11:photoprotection
n4:kodStatuVydavatele
NL - Nizozemsko
n4:kontrolniKodProRIV
[E35CD358F8EF]
n4:nazevZdroje
Journal of Biotechnology
n4:obor
n18:EH
n4:pocetDomacichTvurcuVysledku
4
n4:pocetTvurcuVysledku
4
n4:projekt
n16:ED1.1.00%2F02.0073
n4:rokUplatneniVysledku
n6:2012
n4:svazekPeriodika
162
n4:tvurceVysledku
Sinětova, Maria A. Červený, Jan Zavřel, Tomáš Nedbal, Ladislav
n4:wos
000311019700018
s:issn
0168-1656
s:numberOfPages
8
n14:doi
10.1016/j.jbiotec.2012.04.009