B5培养基基盐（不含维生素）

GAMBORG B5 MEDIUMG
G0209.0050

B5培养基的主要特点是含有较低的铵，这是因为铵可能对不少培养物的生长有抑制作用。经过试验发现，有些植物的愈伤组织和悬浮培养物在MS培养基上生长得比B5培养基上要好，而另一些植物，在B5培养基上更适宜。

B5 medium has been defined for the growth of cell suspensions of soybean root cells in the presence of 2,4 D. Nitrate was required in a concentration of 20-30 mM. An addition of 2 mM ammoniumsulphate led to an increase in cellgrowth. NH4+ when added as the sole source of nitrogen, did not support growth. Similar results were obtai-ned when NH4NO3 was substi-tuted for (NH4)2SO4. However, ammonium ions depressed growth when the concen-tration excee-ded 2 mM. Variati-ons in the concentrations of phosphate, calcium and magnesi-um resulted in relatively minor chan-ges in growth rate. Thiamine is known to be an essenti-al nutrient for cell growth and is increa-sed in concentrati-on up to 10 mg/l. B5 medium has been defined for the growth of cell suspensions of soybean root cells in the presence of 2,4 D. Nitrate was required in a concentration of 20-30 mM. An addition of 2 mM ammoniumsulphate led to an increase in cellgrowth. NH4+ when added as the sole source of nitrogen, did not support growth. Similar results were obtai-ned when NH4NO3 was substi-tuted for (NH4)2SO4. However, ammonium ions depressed growth when the concen-tration excee-ded 2 mM. Variati-ons in the concentrations of phosphate, calcium and magnesi-um resulted in relatively minor chan-ges in growth rate. Thiamine is known to be an essenti-al nutrient for cell growth and is increa-sed in concentrati-on up to 10 mg/l. B5 medium has been defined for the growth of cell suspensions of soybean root cells in the presence of 2,4 D. Nitrate was required in a concentration of 20-30 mM. An addition of 2 mM ammoniumsulphate led to an increase in cellgrowth. NH4+ when added as the sole source of nitrogen, did not support growth. Similar results were obtai-ned when NH4NO3 was substi-tuted for (NH4)2SO4. However, ammonium ions depressed growth when the concen-tration excee-ded 2 mM. Variati-ons in the concentrations of phosphate, calcium and magnesi-um resulted in relatively minor chan-ges in growth rate. Thiamine is known to be an essenti-al nutrient for cell growth and is increa-sed in concentrati-on up to 10 mg/l.
Micro Elements   mg/l   µM
CoCl2.6H2O   0.025   0.11
CuSO4.5H2O   0.025   0.10
FeNaEDTA   36.70   100.00
H3BO3   3.00   48.52
KI   0.75   4.52
MnSO4.H2O   10.00   59.16
Na2MoO4.2H2O   0.25   1.03
ZnSO4.7H2O   2.00   6.96
Macro Elements   mg/l   mM
CaCl2   113.23   1.02
KNO3   2500.00   24.73
MgSO4   121.56   1.01
NaH2PO4   130.44   1.09
(NH4)2SO4   134.00   1.01
Gamborg O.L., Miller R.A., Ojima K., Nutrient requirement of suspensions cultures of soybean root cells. Exp. Cell Res., 50, 151 (1968).

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