Modified high salt medium (HSM) aka Sueoka's medium

Used for Chlamydomonas as well as other species.

Reference: Sueoka, N., Chiang, K.S. and Kates, J.R. (1967) Deoxyribonucleic acid replication in meiosis of Chlamydomonas reinhardtii.  Isotopic transfer experiments with a strain producing eight zoospores. J. Mol. Biol. 25: 44-67.

Stock Substance Concentration Amount added to medium (mL/L)
1. Beijerinck's #2:  

50 mL

NH4Cl 5 g/500 mL
MgSO47H2O 0.2 g/500 mL
CaCl22H2O 0.1 g/500 mL
2. Phosphate #2:  

25 mL

KH2PO4    14.8 g/500 mL
K2HPO4 28.8 g/500 mL
3. AAP trace metal solution See below 1 mL

Final pH of medium is 6.8 and if necessary can be adjusted using 1N HCl and 1N NaOH. 

Autoclave for 20 minutes or longer if using larger quantities than 1 Litre.  Allow medium to stand overnight before use.

Trace metal solution

Substance Concentration (mg/500 mL)
1.  H3BO3 92.76 mg
2.  MnCl24H2O 207.69 mg
3.  ZnCl2  1.64 mg
4.  FeCl36H2 79.89 mg
5.  Na2EDTA2H2O 150.00 mg
6.  CoCl26H2O 1.30 mg
7.  Na2MoO42H2O 3.63 mg
8.  CuCl22H2O 0.006 mg

Dissolve each ingredient before adding the next. Allow to stand until a precipitate develops. Filter into a sterile bottle when colour changes from greenish-brown to purple. Store in refrigerator.