Cyanobacteria evolution: Insight from the fossil record

Demoulin, Catherine; Lara, Yannick; Cornet, Luc; François, Camille; Baurain, Denis; Wilmotte, Annick; Javaux, Emmanuelle

doi:10.1016/j.freeradbiomed.2019.05.007

Cited by 168 publications

(79 citation statements)

References 233 publications

(384 reference statements)

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“…Paleontological interpretations of ancestral cyanobacteria have long been rationalized in terms of morphological and local ecological stasis on geological time scales [e.g., ( 52 )]. The observations reported here extend this working hypothesis of stasis to levels of biological organization—from the global marine ecosystem down to the organellar and, perhaps, biochemical realms—that have not been previously accessible to paleontological insight ( 17 , 19 ). When viewed in terms of the comprehensive nature of the Proterozoic carbon isotope record, this suggests that, like in the modern ocean, pelagic cyanobacteria were an important component of Proterozoic marine primary productivity.…”

Section: Discussionsupporting

confidence: 67%

Carbon isotope evidence for the global physiology of Proterozoic cyanobacteria

et al. 2021

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Ancestral cyanobacteria are assumed to be prominent primary producers after the Great Oxidation Event [≈2.4 to 2.0 billion years (Ga) ago], but carbon isotope fractionation by extant marine cyanobacteria (α-cyanobacteria) is inconsistent with isotopic records of carbon fixation by primary producers in the mid-Proterozoic eon (1.8 to 1.0 Ga ago). To resolve this disagreement, we quantified carbon isotope fractionation by a wild-type planktic β-cyanobacterium (Synechococcus sp. PCC 7002), an engineered Proterozoic analog lacking a CO2-concentrating mechanism, and cyanobacterial mats. At mid-Proterozoic pH and pCO2 values, carbon isotope fractionation by the wild-type β-cyanobacterium is fully consistent with the Proterozoic carbon isotope record, suggesting that cyanobacteria with CO2-concentrating mechanisms were apparently the major primary producers in the pelagic Proterozoic ocean, despite atmospheric CO2 levels up to 100 times modern. The selectively permeable microcompartments central to cyanobacterial CO2-concentrating mechanisms (“carboxysomes”) likely emerged to shield rubisco from O2 during the Great Oxidation Event.

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Section: Discussionsupporting

confidence: 67%

Carbon isotope evidence for the global physiology of Proterozoic cyanobacteria

et al. 2021

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“…Cyanobacterial blooms are a serious issue in fresh, brackish, and marine water, as they decrease light penetration through the water and deplete dissolved oxygen, causing mortality for aquatic life [2]. Cyanobacteria are oxygenic autotrophs, constituting the largest and most diverse community of photosynthetic prokaryotes [3]. medium [28] and acclimatized for 14 days inside an incubator (MIR-254, Sanyo, Tokyo, Japan) at 20 • C; they underwent manual shaking three to five times per day.…”

Section: Introductionmentioning

confidence: 99%

Effects of Light Intensity and Exposure Period on the Growth and Stress Responses of Two Cyanobacteria Species: Pseudanabaena galeata and Microcystis aeruginosa

Muhetaer

Asaeda

Jayasanka

et al. 2020

Water

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Light is an important factor that affects cyanobacterial growth and changes in light can influence their growth and physiology. However, an information gap exists regarding light-induced oxidative stress and the species-specific behavior of cyanobacteria under various light levels. This study was conducted to evaluate the comparative effects of different light intensities on the growth and stress responses of two cyanobacteria species, Pseudanabaena galeata (strain NIES 512) and Microcystis aeruginosa (strain NIES 111), after periods of two and eight days. The cyanobacterial cultures were grown under the following different light intensities: 0, 10, 30, 50, 100, 300, and 600 μmol m−2 s−1. The optical density (OD730), chlorophyll a (Chl-a) content, protein content, H2O2 content, and the antioxidative enzyme activities of catalase (CAT) and peroxidase (POD) were measured separately in each cyanobacteria species. P. galeata was negatively affected by light intensities lower than 30 μmol m−2 s−1 and higher than 50 μmol m−2 s−1. A range of 30 to 50 μmol m−2 s−1 light was favorable for the growth of P. galeata, whereas M. aeruginosa had a higher tolerance for extreme light conditions. The favorable range for M. aeruginosa was 10 to 100 μmol m−2 s−1.

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“…İnsan ve hayvan sağlığı için zararlı olan ve toksisitelerine göre hepatotoksin, nörotoksin, sitotoksin, dermatotoksin ve irritant olarak bilinen değişik siyanotoksinleri üretirler (Dittmann et al2013, Moreira et al 2014. Siyanobakteriler değişik fotosentetik pigmentler içermeleri nedeniyle denizlerin temel besin kaynağını oluşturan ve atmosferik azotu da asimile ederek diğer organizmaların kullanabileceği mineral azota dönüştürebilen organizmalardır (Demoulin et al 2019). Ayrıca, yeryüzünde fikse edilen toplam karbonun yaklaşık %20-30'luk bir kısmının sadece bu bakterilerce sağlandığı düşünülmektedir.…”

Section: Introductionunclassified

Genetic Characterization of Some Cyanobacterial Species Using by RAPD-PCR Technique

2020

JSTR

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Cyanobacteria are the ecologically important organisms due to they thrive in wide variety of habitats and some with the ability to produce secondary metabolites known as cyanotoxin. Besides classical identification methods, DNA fingerprint and many other PCR based molecular approaches have being adopted and well used in the molecular systematics and genetic characterization of Cyanobacteria. In this study, 7 bacterial isolates were analyzed through the RAPD-PCR technique using 15 different randomly selected primers. All the bacterial isolates were produced 306 completely polymorphic amplification products. A minimum 12 and maximum 35 different PCR fragments were obtained by the OPA-14 and Hip-GC primers respectively. The size of RAPD-PCR fragments were varied between 175-3.000 bp. Two different dendrogrames (UPGMA ve Neighbor Joining) were created using Nei's genetic distance and similarity values, to identify genetic relationships among analyzed bacterial isolates. According to the results, the Synechococcus elongatus and Pseudoanabaena moniliformis are defined as the most distant species, while the Anabaena affisinis and Arthrospira sp. are determined as the closest organisms. Consequently, randomly selected primers have generated 100% polymorphic fragments, indicating high efficiency and successful utilization of RAPD-PCR technique in the genetic characterizations and molecular systematics of different Cyanobacteria isolates.

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Cyanobacteria evolution: Insight from the fossil record

Cited by 168 publications

References 233 publications

Carbon isotope evidence for the global physiology of Proterozoic cyanobacteria

Carbon isotope evidence for the global physiology of Proterozoic cyanobacteria

Effects of Light Intensity and Exposure Period on the Growth and Stress Responses of Two Cyanobacteria Species: Pseudanabaena galeata and Microcystis aeruginosa

Genetic Characterization of Some Cyanobacterial Species Using by RAPD-PCR Technique

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