:""( This was in my first year. I don't even know what I was talking about. Sorryyy
It is more correct to understand that bacteria depends on substrate concentration. If it is in excess it will impair growth as well as if it is lacking some nutrient.
Hi there,
What do you mean by substrate? Is it carbon source?
It seems difficult to imagine that a single cell may regulate extracellular medium whatever concentration (by definition extracellular medium may be infinite so...)... On the contrary the cell always maintains a concentration gradient between extracellular concentration of sugar (for instance) and its cellular concentration to make the best of this gradient for the sugar uptake. For glucose for instance, immediate phosphorylation inside the cell is the event allowing maintenance of the gradient and also avoiding cell leakage. So the control is always easier in the inner compartiment.
The bacteria depend on the concentration of the substrate for its development. From the use of this substrate, the concentration of the same can vary, but it is not a direct action, it is more correct to say that this variation is a consequence of using the substrate.
Dear Ranjith,
From the concept what we have study, for the bacterial growth the concentration of the substrate in the media especially during the growth phase plays a major role.
during the growth phase the movement of the substrate/nutrients into the cell depends on the cellular metabolism i.e., the metabolic pathways at that particular point, if the cell is not in need then it will be regulated either by the active or passive transport system by the cells. Might be in this way the bacteria might control the concentration of substrate/nutrients contents concentration in the media.
Dear Gopika, you will receive better answers if you provide more context and details to your question. Your question can be read in multiple ways and you will get multiple answers if you don't frame it as functionally as possible.
ON A METHODS LENS:
Bacterial growth in a lab medium depends on the nutrients supplied in that medium. Often, a bacterial medium is formulated to match the needs of a specific group (family, genus) or species of bacterium/a.
ON A PHYSIOLOGY LENS:
Bacterial cells are capable of regulating the inflow and outflow of substances inside them. Several mechanisms for regulating and ensuring cellular transport exist such as membrane proteins of all sorts. In a way, they (bacterial cells) may dictate the concentration of a particular substrate in a medium for a certain point during their life time.
-Arizaldo
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