Griffitts:Common media

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Bacterial Media and Additives

LB Broth (1 L)

• 1 L dH₂0
• 10 g Bacto tryptone
• 5 g Bacto yeast extract
• 5 g NaCl
• 1 mL 2N NaOH
• 12 g agar (optional)
  

Autoclave

LB-Top agar (500 mL)

• 500 mL dH₂0
• 5 g Bacto tryptone
• 2.5 g Bacto yeast extract
• 2.5 g NaCl
• 0.5 mL 2N NaOH
• 2 g agar
  
  • Microwave until agar is dissolved
    
  • Distribute 75 mL per bottle
    
  • Autoclave
    

Note: Add 3 mM CaCl₂ before phage infections

Swarm agar for E. coli (400 mL)

• 400 mL dH₂0
• 4 g Tryptone
• 2 g NaCl
• 0.88 g Agar (for 0.22%)
  

Autoclave

TY broth (1 L)

• 1 L dH₂0
• 6 g Bacto tryptone
• 3 g Bacto yeast extract
• 0.5 g CaCl₂·2H₂0
• 12 g Bacto agar (optional)
  

Autoclave
Note: for motility assays, mage agar 0.22%

Water agar (250 mL)

• 250 mL dH₂0
• * 3 g agar
  

Autoclave

Standard Minimal Medium (SMM)(250 mL)

To 250 mL sterile dH₂0 or water agar add:

• 2.5 mL 100X SMAJ
• 2.5 mL 100X MCBT
• 2.5 mL 30% carbon source
• antibiotics (optional)
  

Autoclave

100X SMAJ (50 mL)

• ~30 mL ddH₂0
• 8 g KH₂PO₄
• 12 g K₂HPO₄
• 2 g NaCl
• 4 g NH₄Cl
  

(takes a while to dissolve)
QS to volume with ddH₂0
Filter sterilize

100X MCBT (50 mL)

• 50 mL ddH₂0
• 2.46 g MgSO₄·7H₂0
• 1 mg CoCl₂
• 1 mg biotin
• 3 mg thiamine
  

Filter sterilize
Note: Biotin takes a while to dissolve

100X (30%) carbon source (50 mL)

• 15 g carbon source (e.g. sucrose, mannitol, glucose, lactose, sodium succinate).
• QS to volume with ddH₂0

Filter sterilize Note: mannitol and lactose are soluble at 30% only upon heating

Plant Media and Additives

Standard Nodulation Medium (SNM) (1 L)

• 1 L dH₂0
• 0.15 g CaCl₂·2H₂0
• 0.25 g MgS0₄·7H₂0
• 0.35 g KH₂PO₄
• 2 mL 500X minor salts
• pH to 7.0 (~850 μL 2N KOH
• 13 g plant agar
  

Microwave to dissolve agar
Distribute 8.2 mL per 18×150 disposable tube
Cap tubes
Autoclave for 10 minutes
Wet the tubes (this way they'll stick to the rack instead of sliding out) Slant the racks carefully, making sure the agar reaches the bottom of the cap Allow to cool for at least one hour and preferably overnight

500X minor salts (200 mL)

• 1.9 g Na₂EDTA·2H₂0
• 1.4 g FeSO₄·7H₂0
• 300 mg ZnSO₄·7H₂0
• 300 mg H₃BO₃
• 300 mg MnSO₄·H₂0
• 30 mg Na₂MoO₄·2H₂0
• 3 mg CuSO₄
• 3 mg CoCl₂

QS to volume with ddH₂0
Some heating may be required to get it all into solution Filter sterilize