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From: Athel Cornish-Bowden <me@yahoo.com>
Newsgroups: talk.origins
Subject: Re: A large colonial choanoflagellate from Mono Lake harbors live bacteria
Date: Sat, 24 Aug 2024 11:54:59 +0200
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On 2024-08-23 19:59:29 +0000, erik simpson said:

> https://journals.asm.org/doi/10.1128/mbio.01623-24
> 
> ABSTRACT
> As the closest living relatives of animals, choanoflagellates offer 
> insights into the ancestry of animal cell physiology. Here, we report 
> the isolation and characterization of a colonial choanoflagellate from 
> Mono Lake, California. The choanoflagellate forms large spherical 
> colonies that are an order of magnitude larger

by volume, by surface area, by diameter? It makes a huge difference.

>  than those formed by the closely related choanoflagellate Salpingoeca 
> rosetta. In cultures maintained in the laboratory, the lumen of the 
> spherical colony is filled with a branched network of extracellular 
> matrix and colonized by bacteria, including diverse Gammaproteobacteria 
> and Alphaproteobacteria. We propose to erect Barroeca monosierra gen. 
> nov., sp. nov. Hake, Burkhardt, Richter, and King to accommodate this 
> extremophile choanoflagellate. The physical association between 
> bacteria and B. monosierra in culture presents a new experimental model 
> for investigating interactions among bacteria and eukaryotes. Future 
> work will investigate the nature of these interactions in wild 
> populations and the mechanisms underpinning the colonization of B. 
> monosierra spheres by bacteria.


-- 
Athel -- French and British, living in Marseilles for 37 years; mainly 
in England until 1987.