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Functions of medium. Provide waterProvide mineral nutritional needsProvide vitaminsProvide growth regulatorsAccess to atmosphere for gas exchangeRemoval of plant metabolite waste. Mineral Elements. Macroelements. Nitrogen (N)nitrate ion (NO3- oxidized) ammonium ion (NH4 reduced)25-60 mMorg
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1. Nutrient Media for Plant Tissue Cultures
2. Functions of medium Provide water
Provide mineral nutritional needs
Provide vitamins
Provide growth regulators
Access to atmosphere for gas exchange
Removal of plant metabolite waste
3. Mineral Elements
4. Macroelements Nitrogen (N)
nitrate ion (NO3- oxidized)
ammonium ion (NH4+ reduced)
25-60 mM
organic
5. Macroelements Potassium (K) 20 -30 mM
Phosphorous (P) 1-3 mM
Calcium (Ca) 1-3 mM
Magnesium (Mg) 1-3 mM
Sulfur (S) 1-3 mM
6. Micronutrients Iron (Fe) 1 m M
Manganese (Mn) 5-30 m M
Zinc (Zn)
Boron (B)
Copper (Cu) 0.1 m M
Molybdenum (Mo) 1 m M
Cobalt (Co) 0.1 m M
Iodine (I) Nickel (Ni), aluminum (Al), and silicon (Si)
7. Organic Compounds Sugar
sucrose
others
20 to 40 g/l
Vitamins
thiamine (vitamin B1)
nicotinic acid (niacin) and pyridoxine (B6)
myo-inositol
8. Other Compounds Activated charcoal
Plant growth regulators!
9. Support Systems Agar (from seaweed)
Agarose
Gelrite (Phytagel) (from bacteria)
Mixtures (Phytagar)
Mechanical (bridges, rafts)
Sand
10. Media Formulations Many available
Differ in salt concentrations
Differ in presence or absence of salts