The optimal growth medium for a certain species is often not so easy to determine. The question if and how two media differ for a species is difficult to answer, what do you understand under "the composition are not as much different"? Some things that seem small and can make a huge difference: amino acid composition, vitamins and other growth factors, salts, pH, osmotic pressure, ...
What exactly do you mean? The concentration of nutrients plays a major role.
Please tell, what are the differences in growth media composition.
Best regards
Vit
Medium composition is not the only factor affecting bacteria growth. Mohammad Oves has done justice to the question.
Even the difference of a minor componenet in the media effect bacterial growth
Some bacteria are sensitive to ionic levels of nutrient media, a small increase in ionic concentration may affect bacterial growth
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