Physiology of the Photosynthetic Prokaryotes

Ormerod, John G.

doi:10.1007/978-1-4757-1332-9_3

Cited by 17 publications

(4 citation statements)

References 52 publications

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“…Every metabolic reaction has to be controlled temporally and/or spatially. Cyanobacteria perform photosynthesis during the day and respiration during the night (1,2), as well as cell division only in certain phases (3). Enzymes (e.g., cytochrome b 6 f) shared by two incompatible biochemical processes (e.g., photosynthesis and respiration) are not fed into both pathways at the same time (4), and other disparate cellular processes, such as photosynthesis (produces oxygen as a by-product) and oxygen-sensitive nitrogen fixation, are separated in time in unicellular diazotrophic cyanobacterial species (5)(6)(7).…”

mentioning

confidence: 99%

Daily Expression Pattern of Protein-Encoding Genes and Small Noncoding RNAs in Synechocystis sp. Strain PCC 6803

Beck

Hertel

Rediger

et al. 2014

Appl Environ Microbiol

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mentioning

confidence: 99%

Daily Expression Pattern of Protein-Encoding Genes and Small Noncoding RNAs in Synechocystis sp. Strain PCC 6803

Beck

Hertel

Rediger

et al. 2014

Appl Environ Microbiol

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“…Primjena sekundarnih lignoceluloznih sirovina u biotehnološkoj proizvodnji je osobito interesantna jer takve sirovine predstavljaju relativno jeftin, lako dostupan i obnovljiv izvor različitih organskih tvari (Choudhury i sur., 2017; Mirza i sur., 2019). Ormerod, 1992;Tabita, 1995). Tijekom uzgoja R. adriaticum DSM 2781 na hranjivoj podlozi s 5 g L -1 glukoze (Slika 1) utrošilo se 3,879 g L -1 glukoze tijekom 96 sati uzgoja, a prinos biomase je iznosio 2,095 g L -1 .…”

Section: Rezultati I Raspravaunclassified

“…Fotosintetska fosforilacija uključuje apsorpciju fotona u molekulama pigmenata koja rezultira ekscitacijom elektrona i njihovim cirkuliranjem kroz fotosustav. Time dolazi do formiranja transmembranskog gradijenta protona koji predstavlja pokretačku silu za sintezu ATP-a ili redukciju NADP + u NADPH (Ormerod, 1992). U uvjetima limitacije kisikom, osim fototrofnog rasta, određene vrste ljubičastih nesumpornih bakterija poput Rhodobacter capsulatus i Rhodobacter sphaeroides pokazuju sposobnost rasta anaerobnom respiracijom ili fermentacijom u mraku (Imhoff, 2006;Madigan i Jung, 2009;Zannoni i sur., 2009).…”

unclassified

Fotoheterotrofni uzgoj ljubičaste nesumporne bakterije Rhodovulum adriaticum na hranjivim podlogama s različitim izvorima ugljika

Novák

Trontel

Marđetko

et al. 2020

Hrvat. čas. prehrambenu tehnol. biotehnol. nutr. (Online)

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Ljubičaste nesumporne bakterije zanimljive su s ekološkog i ekonomskog stajališta u održivim biotehnološkim procesima proizvodnje biogoriva, biokemikalija, biopolimera, biomase odnosno sintezi specifičnih spojeva kao što su npr. karotenoidi i pigmenti. Za uspostavu ekološki i ekonomski održivih bioprocesa nužan je adekavatan odabir radnih mikroorganizama, sirovina i uvjeta kultivacije, a dobar primjer za to je razvoj bioprocesa na obnovljivim sirovinama kao što su to lignocelulozne sirovine. U ovom istraživanju proučavan je fotoheterotrofni uzgoj ljubičaste nesumporne bakterije Rhodovulum adriaticum DSM 2781 na tekućim hranjivim podlogama koje sadrže glukozu i/ili ksilozu kao izvore ugljika s ciljem dobivanja bakterijske biomase i fotosintetskih pigmenata. Rezultati istraživanja pokazuju da su najveće vrijednosti pokazatelja uspješnosti bioprocesa (YX = 2,095 g L-1; YX/S = 0,54 g g-1i Pr = 0,022 g L-1h-1) vezanih u dobivanje biomase ostvareni kod uzgoja na hranjivoj podlozi s 5 g L-1 glukoze. Uzgoj R. adriaticum DSM 2781 na hranjivoj podlozi s 3 g L-1 glukoze i ksiloze pokazao se najuspješnji za dobivanje fotosintetskih pigmenata (ukupni pigmenti 13,27 mg g-1 biomase) uz zadovoljavajuće ostale pokazatelje uspješnosti bioprocesa (YX = 1,507 g L-1; YX/S = 0,22 g g-1i Pr = 0,017 g L-1h-1).

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“…Contrary to other modern bacteria, cyanobacteria have the capacity to perform oxygenic photosynthesis (Ormerod ). Cyanobacteria are even able to simultaneously perform photosynthesis and respiration within the same compartment (e.g.…”

mentioning

confidence: 99%

First record of Cyanobacteria in Cambrian Orsten deposits of Sweden

Castellani¹,

Maas²,

Eriksson

et al. 2018

Palaeontology

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The Swedish Cambrian ‘Orsten’‐type fossil sites have yielded diverse secondarily phosphatized three‐dimensionally preserved microfossils, mainly of arthropod affinities. Similar material has also been recorded from Canada, the UK, Poland, Siberia, China and Australia. Only one other non‐arthropod group, the Cycloneuralia, is commonly reported from any of these sites, leading to the general assumption that ‘Orsten’‐type preservation is largely restricted to animals with a chitin‐containing cuticle. We describe here secondarily phosphatized, originally unmineralized, thread‐shaped fossils etched out of Cambrian ‘Orsten’‐type deposits from the Agnostus pisiformis Biozone of the Alum Shale Formation in Sweden. These fossils strikingly resemble specimens previously described from Precambrian deposits, with at least two different morphotaxa identified (Siphonophycus kestron Schopf and Oscillatoriopsis longa Timofeev & Hermann) as well as the modern Oscillatoria. This leads us to interpret the new fossils as unbranched, uniseriate filamentous cyanobacteria. Our morphological investigations, combined with morphometrics, allow grouping the specimens assigned to O. longa into two size classes, suggesting an even higher diversity within the ‘Orsten’ assemblages. The lack of cyanobacterial material in any sample younger than the A. pisiformis Biozone indicates that rather drastic changes occurred in the environment, that is, substrate conditions on the Alum Shale seafloor. This coincided with a significant change in the composition of the trilobite communities and onset of the globally recognized Steptoean Positive Isotope Carbon Excursion (SPICE) in Scandinavia.

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Physiology of the Photosynthetic Prokaryotes

Cited by 17 publications

References 52 publications

Daily Expression Pattern of Protein-Encoding Genes and Small Noncoding RNAs in Synechocystis sp. Strain PCC 6803

Daily Expression Pattern of Protein-Encoding Genes and Small Noncoding RNAs in Synechocystis sp. Strain PCC 6803

Fotoheterotrofni uzgoj ljubičaste nesumporne bakterije Rhodovulum adriaticum na hranjivim podlogama s različitim izvorima ugljika

First record of Cyanobacteria in Cambrian Orsten deposits of Sweden

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