1
nutrients
supply of monomers (or precursors of) required by cells for growth
2
macronutrients
nutrients required in large amounts
3
micronutrients
nutrients required in trace amounts
4
macronutrients: carbon (C)
- required by ALL cells, major element in ALL classes of macromolecules
- typical bacterial cell is ~50% carbon (by dry weight)
- heterotrophs use organic carbon, autotrophs use carbon dioxide (CO2)
5
macronutrients: nitrogen (N)
- typically bacterial cell is ~13% nitrogen (by dry weight)
- key element in proteins, nucleic acids, and many more cell constituents
6
macronutrients: phosphorus (P)
synthesis of nucleic acids and phospholipids
7
macronutrients: sulfur (S)
sulfur-containing amino acids
8
macronutrients: potassium (K)
...
9
macronutrients: magnesium (Mg)
...
10
macronutrients: calcium (Ca)
...
11
macronutrients:sodium (Na)
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