We all know that Spirulina/Arthrospira both are spirally coiled filaments. But in lab culture media they sometimes transform their shape to straight filaments.
Same thing happened to my Spirulina culture. As per the literature its beacuse of the stressed conditions or the fluctuating enviroment in vitro. There is some change in the transcription pattern. You can check out this paper i m attaching.
@Monika. Thanks. But in natural environment, the conditions are always limiting but the Spirulina filament is always found coiled. Its only happen in lab culture. I think major factor is low pH.
pH always go towards basic side as the culture grows old. you will find the pH around 9-10 that too in a week's time. Think this way in vitro the enviroment is very restricted but naturaly they exist in huge mass n sheets flowing freely that too in a fresh enviroment. Here limiting conditions dsn't refer to the nutritional aspect but the enviromental conditions.i hope you r geeting my point.
Hi Uday,
We maintain the strain in the laboratory conditions for years and we seldom observe such elongations. Please provide further information on, whether the strain is changing during any specific experimental conditions or as such. If possible please perform a molecular charecterization of the strains in two different forms. It could provide some idea.
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