Login

Join for Free!
114409 members


Capsules and Slime layers

About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

Moderator: BioTeam

Capsules and Slime layers

Postby dizzysally » Sat May 19, 2012 1:49 pm

If firmly attached to a cell wall of G+ bacteria leaving a structured tight matrix excluding particles it is a capsule.

If loosely attached to a cell wall and matrix includes small particles it is referred to as a slime layer.

I was just wondering seen as a capsule is attached to G+ cell walls does that mean that slime layers attach to G- cell walls?

Ive an exam on Wednesday and im just trying to get my head around the surface structure of bacteria.. If anyone could answer my question it would be greatly appriciated
Thanks :)
dizzysally
Garter
Garter
 
Posts: 2
Joined: Sat May 19, 2012 1:41 pm

Postby JorgeLobo » Sat May 19, 2012 2:09 pm

What is the mechanical distinction/test of "loosely attached"?
JorgeLobo
Coral
Coral
 
Posts: 424
Joined: Mon Nov 17, 2008 12:12 am

Re:

Postby dizzysally » Sat May 19, 2012 6:18 pm

JorgeLobo wrote:What is the mechanical distinction/test of "loosely attached"?



I dont understand?
dizzysally
Garter
Garter
 
Posts: 2
Joined: Sat May 19, 2012 1:41 pm


Postby JorgeLobo » Sun May 20, 2012 10:45 am

The term" loosely attached" is subjective. There has to be some objective test that tells you that slime is loosely attached vs. the reportedly more tenacious capsule. Ask your teacher.
Suggest the distinction is not useful. What is capsule for an isolated cells is a slime layer for a population (millions of cells) on a surface. That appears to be what is being said - one doesn't see particles in a capsule on any isolated cell and one always sees particles in a complex slime layer-biofilm on a surface populated with many cells and thatbiofilm layer sloughs off material.. Maybe you could ask for a direct comparison on individual cell level.
JorgeLobo
Coral
Coral
 
Posts: 424
Joined: Mon Nov 17, 2008 12:12 am


Return to Microbiology

Who is online

Users browsing this forum: No registered users and 1 guest

cron