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Items tagged with: cyanobacteria

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#MolecularClock analysis shows #bacteria used oxygen long before widespread photosynthesis
phys.org/news/2025-04-molecula…

A geological timescale for bacterial #evolution and oxygen adaptation science.org/doi/10.1126/scienc…

"the earliest aerobic transition occurred in an ancestor of photosynthetic #cyanobacteria, indicating that the ability to utilize trace amounts of oxygen may have allowed the development of genes central to oxygenic #photosynthesis."

Molecular clock analysis shows bacteria used oxygen long before widespread photosynthesis

Microbial organisms dominate life on Earth, but tracing their early history and evolution is difficult because they rarely fossilize. Determining when exactly a particular group of microbes first appeared is especially hard.
Okinawa Institute of Science and Technology (Phys.org)
#Evolution #bacteria #cyanobacteria #photosynthesis #molecularclock

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#Bacterial acquisition of #zinc. @Ignacio_Luque_R @cyanofur &co reveal that a previously unstudied exoprotein from #cyanobacteria is an ancient system for Zn2+ acquisition that has been well conserved for billions of years #PLOSBiology plos.io/3PkyfBU

An ancient bacterial zinc acquisition system identified from a cyanobacterial exoproteome

Bacteria have developed fine-tuned responses to cope with limiting amounts of the essential mineral zinc.
plos.io
#plosbiology #bacterial #cyanobacteria #zinc

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Two lifeforms merge in once-in-a-billion-years #evolutionary event
Scientists have caught a once-in-a-billion-years evolutionary event in progress, as two lifeforms have merged into one organism that boasts abilities its peers would envy. Last time this happened, Earth got plants. The #algae Braarudosphaera bigelowii has been found to have absorbed a #cyanobacteria called UCYN-A, which may be a huge step forward for #evolution.
newatlas.com/biology/life-merg…

Two lifeforms merge in once-in-a-billion-years evolutionary event

Scientists have discovered that a once-in-a-billion-years evolutionary event is underway, as two lifeforms have merged into one organism that boasts abilities its peers would envy. Last time this happened, Earth got plants.
Michael Irving (New Atlas)
#Evolution #cyanobacteria #algae #evolutionary

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The #symbioses that gave rise to primary #organelles are key events in the origin of #Eukaryotes. @PierreSGarcia @FredBarras & @SGribaldo use markers from 2 conserved machineries for [Fe-S] cluster biogenesis to support an early emergence of #mitochondria & #plastids within #Alphaproteobacteria & #Cyanobacteria #PLOSBiology plos.io/3FNP5E5

Components of iron–Sulfur cluster assembly machineries are robust phylogenetic markers to trace the origin of mitochondria and plastids

The symbioses that gave rise to primary organelles are key events in the origin of Eukaryotes. This study uses a dataset of markers belonging to two conserved machineries responsible for [Fe-S] cluster biogenesis to support an early emergence of mito…
plos.io
#plosbiology #mitochondria #cyanobacteria #eukaryotes #organelles #alphaproteobacteria #plastids #symbioses

#microbiology #marine #cyanobacteria

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Blooms of #Cyanobacteria pose a significant threat to #freshwater systems including rivers driving both #eutrophication and its dire implications for freshwater species as oxygen availability plummets and also the additional threat posed by #cyanotoxins produced by some Cyanobacteria.

This new research in Scientific Reports takes a #metagenomics and Q-PCR approach to explore the composition of the Cyanobacterial populations and their cyanotoxin production gene in major rivers across the United States (in 2019) and identifies Microcystis as the key toxin producing genus across this study.

Find out more on:

nature.com/articles/s41598-023…

#microbiology #ecology #MicrobialEcology

Metagenomic mapping of cyanobacteria and potential cyanotoxin producing taxa in large rivers of the United States - Scientific Reports

Scientific Reports - Metagenomic mapping of cyanobacteria and potential cyanotoxin producing taxa in large rivers of the United States
Nature
#ecology #microbiology #freshwater #cyanobacteria #MicrobialEcology #metagenomics #eutrophication #cyanotoxins

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Rare opportunity to study short-lived volcanic island reveals sulfur-metabolizing #microbes phys.org/news/2023-01-rare-opp…

The Early Microbial Colonizers of a Short-Lived Volcanic Island in the Kingdom of #Tonga journals.asm.org/doi/10.1128/m…

"We didn't see what we were expecting. We thought we'd see organisms you find when a glacier retreats, or #cyanobacteria, more typical early colonizer species—but instead we found a unique group of #bacteria that metabolize sulfur and atmospheric gases."

Rare opportunity to study short-lived volcanic island reveals sulfur-metabolizing microbes

In 2015, a submarine volcano in the South Pacific erupted, forming the Hunga Tonga Hunga Ha'apai island, destined to a short, seven-year life.
Science X (Phys.org)
#bacteria #Tonga #cyanobacteria #microbes

#habs #limnology #freshwater #cyanobacteria

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