Small Things Considered

Trichoplax & Company II.

by Christoph | When searching the metagenomes ob­tain­ed from single Tri­cho­plax H2 in­di­vi­du­als for 16S and 18S rRNA-spe­ci­fic se­quen­ces, Gru­ber-Vo­dic­ka et al. found, next to the pre­va­lent Tri­cho­plax and Grel­lia se­quen­ces a third se­quen­ce at high fre­quen­cy that mat­ched well with known 16S rRNA se­quen­ces from the Ma­ri­na­mar­gu­lis­bac­te­ria (ZB3), a branch with­in the phy­lum Mar­gu­lis­bac­te­ria... Read more →

Trichoplax & Company I.

by Christoph | Take a few thousand small eu­kar­yo­tic cells, al­low for a few dif­fe­rent cell types, and sea­son the cells ge­ne­rous­ly with en­do­sym­bionts (no, not mi­to­chon­dria, they al­ready have these!). Let the cells self-or­ga­ni­ze into a pat­ty – or a po­ta­to chip, if you're more in­to a ve­gan life­style – with a dia­me­ter of ap­pro­xi­ma­te­ly 0.5–1.0 mm, and a mere 25 µm thick. Read more →

Life After CPR

by Mechas Zambrano and Roberto | For most English speakers, CPR would be assumed to stand for cardiopulmonary resuscitation, oftentimes a real life saver. But for many readers of this blog, the acronym has a whole different meaning. For the last few years, CPR, has stood for the "Candidate Phyla Radiation." The discovery of the CPR superphylum was (and remains) one of the most remarkable developments in our growing realization that the genetic diversity of the microbial world is unimaginably vast. Read more →

A sprinkle of acid a day keeps the law enforcement away

by Aleks Prochera | Imagine you look like someone dangerous, a criminal, an enemy. Despite being an exemplary citizen, you have to deal with the possibility that, at one point or another, you might get in trouble with law enforcement simply because you appear threatening. That's a struggle that many bacterial members of a plant's microbiome face. Read more →

The Continuing Saga of Insect-Associated Streptomyces

by Roberto | For some reason that I cannot really pinpoint, I am con­ti­nu­ally fascinated by the interactions that are continually discovered between insects and bacteria. Among some of my favorites are those that involve insects that carry bacteria that produce antimicrobial com­pounds that in turn provide a useful function for the insect.
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Strawberry Fields Forever

by Mechas Zambrano and Roberto | Close your eyes for a mo­ment and ima­gine your­self in front of a plate full of fresh­ly picked, bright red, fra­grant, ripe, and sweet straw­ber­ries. For most of you, that should be a tru­ly "mouth water­ing" ex­per­i­ence. If you do en­joy straw­ber­ries, you are part of a long and wide­spread plea­sure that goes back mil­len­nia through the eat­ing of wild straw­berry spe­cies... Read more →

A Vertical Symbiont Keeps Its Chromosome Oriented Towards The Host

by Philipp Weber | Have you ever heard of 'Can­di­da­tus Thio­sym­bion onei­sti' It is a rod-sha­ped bac­te­ri­um that at­ta­ches, via one of its pol­es, to the cu­ticle of a ma­rine ne­ma­to­de. Onei­sti is com­mit­ted to have each daugh­ter cell in con­stant and in­ti­mate con­tact with its host. To ac­comp­lish this, it can­not simple elon­gate along... Read more →

Strictly Intracellular Parasite No More

by Elio | We learn with mother's milk (or at least in a beginning micro­bio­logy course) that certain bacteria, notably rickettsiae, chlamydiae, and anaplasmas, cannot grow outside of host cells. Thus, they are de­fined as being strictly intracellular parasites. Ha! A member of the ric­kettsiae has now been found to grow freely outside of host cells. Read more →

Discovering a Novel Algal-Fungal Symbiosis and a Humanized Journal

by Elio | Lichens are said to occupy an astounding 6% of the surface of Earth’s land mass, so pay attention. As you are well aware, lichens arise by the symbiotic interaction of fungi and algae (or sometimes cyanobacteria). And as you know, they consist of separate individuals of the two partners, each benefiting from the interaction. Read more →

A Wormful of Bugs, Again...

by Christoph | When you've followed our posts on symbioses between ani­mals and bac­te­ria over the last two years or so, you could have ea­si­ly got the im­pres­sion that they oc­cur main­ly be­tween in­sects and Gamma­pro­teo­bac­te­ria from the or­der En­te­ro­bac­te­ra­les of this large and di­verse phy­lum. This im­pression would be skewed but only because our choice of topics was! Read more →