The main characteristics of Azotobacter are:
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Azotobacter is a polymorphic gram negative bacteria.
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The young cells of the bacteria possess peritrichous flagella which functions as locomotive organs.
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Most of the species of Azotobacter are very sensitive to acidic pH, salts and temperature.
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Optimum range of temperature is between 20°C and 30°C.
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The thick walled cysts are also formed.
