nutritional requirements and cultivation of bacteria. different types of bacterial culture media.

1. Nutritional requirments , growth and
cultivation of bacteria
Source of energy:
Chemotrophs: from chemicals
Phototrophs: from light(radient energy)
Source of electrons:
Lithotrophs: use reduced inorganic compounds as electron donors.
They are chemolithotrophs and photolithotrophs.
Organotrophs: use organic compounds as electron donors. They are
chemo-organotrophs and photoo-organotrophs.
Source of carbon:
Autotrophs: from Co2
Heterotrophs: from organic compounds.
Source of nitrogen: atomsporic nitrogen or inorganic nitrogen(nitrates
and nitrites or ammoniam salts) some types from amino acids
Oxygen, sulfur and phosphorous:

2. Macro elements and microelements:
Macro elements:Ca+, k+ , Mg+, and Fe+
Micro elements: Zn2+ Cu2+, Mn2+ ,Mo6+,Ni2+, B3+
and Co2+
Vitamins and vitamin like compounds:
water:

34. Thank you