Winoblog, The last post, group B7.
In response to the last post’s comment, Beggiatoa isn’t growing here. Simply, it was cyanobacteria.
Cyanobacteria grow in a space with oxygen, at the top of the column. This area can present a ligth brown. This is the part of the column richer in oxygen and poorer in sulfur. However, certain quantities of SH2 arrive to the first stratum by diffusion from the mud of lower areas. This quantities can be used by sulfide oxidisers.
To emphasise, at the end of our Winogradsky column, we can observe red and orange colours.
Rhodospirillum and Rhodopseudomonas produce those colorus. Their abundance depends
on the amount of hydrogen sulphide that has been produced and that has been utilised. Those
microorganisms are photoorganotrophs.
In order to conlcude with our experiment, we think that this experiment have an interesting
ecologic part. The microorganisms that are involved in the column have the ability to regulate
a medium that was saturated with nutrients and to generate a gradient of gases.
This microorganisms have a specific metabolic pathways that can produce subtances that others can use
to obtain energy. This “chain relation” through bacterias are so interesnting and can be used in
biotechnological process. For example, this microorganisms can be used to regulate an ecosistem
that it’s saturated of some substances, this knoledge field is called “Bioremediation”,
and its booming science sector.
Other example is generating a “chain” trough some microorganisms to obtain some interesting substances
for humans or pharmaceutical industries.
To sum up, after that experiment we understand better the relations that can be established in our "Winogradsky column”. What`s more, now we understand the real biotechnological potential of bacteria. This experiment does not finish here, it’s only the beginning  |
| Figure 1: Cyanobacteria |
 |
| Figure 2: Rhodospirillum and Rhodopseudomonas |
 |
| Figure 3: Photo taken 26th May |
No comments:
Post a Comment