http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/-t1.htm What is the nature of micro-organims and other organisms that can catalyze freezing of supercooled water? This section concerns their basic physiology, genetics and ecology as well as the nature of the cell material (generally a protein) that catalyzes freezing of supercooled water. Thu, 21 May 2009 18:53:55 GMT 10 http://i71.servimg.com/u/f71/13/31/11/69/banner12.jpg http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/-t1.htm http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/biological-ice-nucleation-is-there-added-value-of-biology-over-inert-chemistry-t16.htm ceMorris The recent publication of Mortazavi et al (2008) made me wonder if we need to be more precise about the meaning of « biological ice nucleation ». This paper points out that a wide range of environmental bacteria can induce freezing of supercooled water above the homogeneous nucleation point of pure water (-39°C). Their work focused on bacteria isolated from snow, and included ubiquitous organisms such as Stenotrophomonas maltophilia, Bacillus spp., and Microbacterium spp. that are also present ... Biology of microbial ice nucleators Thu, 21 May 2009 18:53:55 GMT http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/biological-ice-nucleation-is-there-added-value-of-biology-over-inert-chemistry-t16.htm#20 http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/biological-ice-nucleation-is-there-added-value-of-biology-over-inert-chemistry-t16.htm http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/next-generation-sequencing-for-metagenomics-of-cloud-dwelling-bacteria-t13.htm Suzanne Is anyone using next generation sequencing for looking at the collection of bacteria in clouds?
Why would the fluorescent pseudomonas be the predominant species in clouds?

Best,
Suzanne]]> Biology of microbial ice nucleators Mon, 19 Jan 2009 20:39:20 GMT http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/next-generation-sequencing-for-metagenomics-of-cloud-dwelling-bacteria-t13.htm#15 http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/next-generation-sequencing-for-metagenomics-of-cloud-dwelling-bacteria-t13.htm http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/role-and-evolution-of-the-in-gene-t6.htm Tom Hill I find it intriguing that it’s hard to define the principal ecological function of such a highly evolved protein. Could it actually have multiple functions or do we lack insight? Hirano and Upper (2000) wrote “there is no clear selection for destroying the leaf habitat. For most organisms, habitat destruction is regarded as highly unfavorable…..the bacteria reward themselves for success [as colonists] by destroying their habitat! Is this not paradoxical?” But could IN bacteria be ... Biology of microbial ice nucleators Fri, 05 Dec 2008 05:43:57 GMT http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/role-and-evolution-of-the-in-gene-t6.htm#7 http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/role-and-evolution-of-the-in-gene-t6.htm http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/ecology-of-biological-ice-nucleators-a-need-for-movement-t5.htm ceMorris We have recently wondered if ice nucleation activity of bacteria is part of a dissemination strategy, assuring that they will get transported back to the ground (via precipitation) once they have attained clouds. Posted today on Nature.com is an interesting article about a unifying framework for understanding the movement of organisms. Although animals are the likely target of thought, the framework is clearly applicable to ‘passive’ dissemination of air borne micro-organisms. See : http://www.nature.com/news/2008/081201/full/news.2008.1268.html Biology of microbial ice nucleators Wed, 03 Dec 2008 13:06:59 GMT http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/ecology-of-biological-ice-nucleators-a-need-for-movement-t5.htm#5 http://bio-ice.forumotion.com/biology-of-microbial-ice-nucleators-f7/ecology-of-biological-ice-nucleators-a-need-for-movement-t5.htm