IUBio Biosequences .. Software .. Molbio soft .. Network News .. FTP

How animals in the hydrothermal vent can live with the high temperature.

Bob bbruner at uclink4.berkeley.edu
Wed Mar 27 20:53:23 EST 2002

On Wed, 27 Mar 2002 14:04:50 -0600, "Em"
<ekhatipoREMOVE at midway.uchicagoREMOVE.edu> wrote:

>There is amother important issue that I believe should be considered, namely
>pressure at the sea bed.  Water is not boiling at 400C down there simply
>because the pressure is too high. 

that is true.

>In respect to boiling point, the 400C
>corrected to high pressure is in fact around 70-80C. That is why most
>thermophiles have in lab conditions temperature optimum ~70C. 

No. That is not how pressure affects growth. Pressure may affect
growth, but not thru its effect on the boiling point.

Thermophiles isolated from hot springs (at P = 1 atm) and thermopiles
isolated from deep sea vents (high P) have approx the same T-max.
(There are some vent organisms that can grow at T > 100 deg, because
the high P keeps the water in the liquid form. The current record high
T for bacterial growth is, I believe, 113 C.)


More information about the Microbio mailing list

Send comments to us at biosci-help [At] net.bio.net