DSMZ 465h . MINERALMEDIUM WITH 6-METHYLNICOTINATE

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Selected strain: Mesorhizobium sp. DSM 11455

This strain uses the standard medium without modifications.


Growth conditions: 30 °C
Equipment needed: Autoclave Filter

Final pH: n.d.

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ml
Compound Amount Unit
Medium 465 1000 ml
Selenite/tungstate stock solution 1 ml
6-methylnicotinate , adjust if required 5 g/l
Vitamin solution 1 ml
1 Supplement medium 465 with selenite, tungstate, 2.5 - 5 g/l 6-methylnicotinate from a stock solution (autoclave separately) and 1 ml/l vitamin solution (see medium 461).

Main sol. 465 #

1000
Compound Amount Unit
Na2HPO4 x 2 H2O 3.50 g
KH2PO4 1.00 g
(NH4)2SO4 0.50 g
MgCl2 x 6 H2O 0.10 g
Ca(NO3)2 x 4 H2O 0.05 g
Trace element solution SL-4 1.00 ml
Distilled water 1000.00 ml
1 pH 7.25
2 Rehydrate and cultivate lyophilized cells in the complex medium recommended for the specific strain (e.g. medium 1, 220, 535 or 830). After this reactivation, cultivate on mineral medium with the appropriate carbon source.

Selenite/tungstate stock solution #

1000
Compound Amount Unit
NaOH 500 mg
Na2SeO3 x 5 H2O 3 mg
Na2WO4 x 2 H2O 4 mg
Distilled water 1000 ml
1 Autoclave separately. Add 1 ml per l medium.

Vitamin solution #

1000
Compound Amount Unit
Vitamin B12 50 mg
Pantothenic acid 50 mg
Riboflavin 50 mg
Pyridoxamine hydrochloride 10 mg
Biotin 20 mg
Folic acid 20 mg
Nicotinic acid 25 mg
Nicotine amide 25 mg
alpha-lipoic acid 50 mg
p-Aminobenzoic acid 50 mg
Thiamine-HCl x 2 H2O 50 mg
Distilled water 1000 ml
1 Stir for some hours, filter sterilize the solution.

Trace element solution SL-4 #

1000
Compound Amount Unit
Na2-EDTA 0.50 g
FeSO4 x 7 H2O 0.20 g
ZnSO4 x 7 H2O 0.10 g
MnCl2 x 4 H2O 0.03 g
H3BO3 0.30 g
CoCl2 x 6 H2O 0.20 g
CuCl2 x 2 H2O 0.01 g
NiCl2 x 6 H2O 0.02 g
Na2MoO4 x 2 H2O 0.03 g
Distilled water 1000.00 ml
1 First dissolve EDTA in distilled water and adjust pH to 7.0 using 2 N NaOH; then add other compounds.

Main sol. 1 #

1000
Compound Amount Unit
Peptone 5 g
Meat extract 3 g
Agar , for solid medium 15 g
Distilled water 1000 ml
1 Adjust pH to 7.0.
2 For Bacillus strains the addition of 10.0 mg MnSO4 x H2O is recommended for sporulation.

Main sol. 220 #

1000
Compound Amount Unit
Casein peptone 15 g
Soy peptone 5 g
NaCl 5 g
Agar 15 g
Distilled water 1000 ml
1 Adjust pH to 7.3. Medium is identical with Tryptone Soya Agar (Oxoid CM 131).

Main sol. 535 #

1000
Compound Amount Unit
Trypticase soy broth
(BBL 11768, Oxoid CM129 or Merck 5459)
30 g
Agar 20 g
Distilled water 1000 ml
1 pH 7.3
2 Autoclave at 121°C for 15 min.

Main sol. 830 #

1000
Compound Amount Unit
Yeast extract 0.50 g
Proteose peptone
(Difco no. 3)
0.50 g
Casamino acids 0.50 g
Glucose 0.50 g
Starch
(soluble)
0.50 g
Na-pyruvate 0.30 g
K2HPO4 0.30 g
MgSO4 x 7 H2O 0.05 g
Agar 15.00 g
Distilled water 1000.00 ml
1 Final pH 7.2; adjust with crystalline K2HPO4 or KH2PO4 before adding agar. Add agar, heat medium to boiling to dissolve agar, and autoclave for 15 min at 121°C.