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Some Common Mineral Functions And Deficiency Symptoms

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Mineral supply and growth: Hormonal Regulation Of Growth And Development

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  Lab Report Name Institution Date LAB REPORT    Table 1. Some Common Mineral Functions and Deficiency Symptoms  
Mineral Some  Functions  Deficiency Symptoms
Nitrogen    
Phosphorus    
Iron    
Calcium    
Potassium    
Magnesium    
Sulfur    
  1) 2) 3)   Mineral supply and growth 4) 0% water only, 1%, 3%, 5%-inorganic fertilizer best nutrient supply and growth  At 10% the inorganic fertilizer improves growth and in the case of crops the yield would also be better 6)  When there is less than optimal nutrient supply there is stunted growth, inadequate supply of nutrients this is also associated with decreased plant productivity and fertility.  When plants are nitrogen deficient the leaves die from the tip and turn brown. 7)  Oversupply of nutrients also harms the plants and affects growth negatively. For instance, nitrogen is crucial to producing chlorophyll and absorbing light, but too much nitrogen in fertilizers can result in nitrate toxicity when the leaves and steams ‘burn’ and can also promote fungal diseases.     II. HORMONAL REGULATION OF GROWTH AND DEVELOPMENT (Week 2)   8) Terminal bud intact Terminal bud removed and mixture of lanolin+IAA (auxin) applied Terminal bud removed  And lanolin applied   9)  
Treatment Development of Lateral Buds
Intact The growth of lateral( axillary) buds is inhibited
Pinched The buds are growing out
Pinched+ Lanolin + IAA Buds fail to grow out because of the repressive effects of auxin
Pinched+ Lanolin The buds are growing out
  10) Auxin has an inhibitory effect on the growth of lateral buds, as auxin is required for apical dominance 11) Pinching the apical bud results in the lateral buds growing 12) Applying the auxin (lanolin+IAA) then inhibit the lateral bud growth again 13) Lanolin is the (control) in the experiment   Experiment A: Effects of Auxins on Root elongation  
Conc. of IAA (mg/L) Length of Roots (mm) Group Mean Length (mm) Group% Change Class Mean Length   Class % Change  
0 (Control) 0 0      
0.1 11.1(3+1.1+2+2+3) 2.22      
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