It depends on different bacteria and the environmental pH. Generally
speaking, most bacteria can keep their internal pH around 7 even when they
grow in a slightly acidic or alkaline environment. Bacteria carry a pH
regulation system which can adjust their internal pH when there is a change
of outside pH. On other hand, some bacteria do grow very well at extreme
conditions, from pH 2-3 to pH 10-11.
JC
Jaime Finguerut wrote:
> Dear All:
>> Would you please help my friend below?
> Don't forget to put his address at the "To:" Field.
>> Thanks a lot
>> jaime
> ------------
>> ------- Forwarded Message Follows -------
> To: nobody at net.bio.net> From: fuller at envirogen.com> Subject: internal cell pH
> Date: Tue, 12 Jan 1999 09:39:04 -0800
> Organization: PSINet
>> Just a general microbiology question that I haven't been able to find an
> answer to...
>> How does internal cell pH of a bacterial cell usually compare to
> external pH? I know that cell pH is usually close to 7, but are there
> shifts in this. If the outside pH were say around 6, would the internal
> pH shift to a little lower or a little higher than 7. And vice versa if
> the external pH were say 7.5-8.0?
>> Any and all responses much appreciated.
>> Thanks,
>> -Mark
>fuller at envirogen.com>> -------------------------------------------------------------------
> To reply to the group as well as to the originator, make sure that
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>> See the BIOFILMS homepage at http://www.im.dtu.dk/biofilms for info
> on how to (un)subscribe and post to the Biofilms newsgroup.
>> ------------------------------------
> Jaime Finguerut (Mr., chem.eng.)
> Copersucar
> Cx.Postal 162 Piracicaba
> Sao Paulo BRAZIL 13400-970
> fax +55 19 429 8109
>jaime at azul.ctc.com.br>> ------------------------------------
> Jaime Finguerut (Mr., chem.eng.)
> Copersucar
> Cx.Postal 162 Piracicaba
> Sao Paulo BRAZIL 13400-970
> fax +55 19 429 8109
>jaime at azul.ctc.com.br
