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Photosynthesis process, Sucrose formation

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Rashidul Islam
Rashidul Islam

This document summarizes the process of sucrose formation in sugar cane. It occurs mainly through photosynthesis, which has two stages: the photo stage and synthesis stage. In the photo stage, light energy is converted to chemical energy through the breakdown of water molecules in the leaves, producing oxygen, NADPH, and ATP. In the synthesis stage, which occurs in darkness, CO2 reacts with RuBP using the energy from ATP and NADPH to form G3P, which is then converted to glucose. The overall reaction results in the formation of sucrose, which makes up 10-16% of sugar cane.

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Photosynthesis process, Sucrose formation
RASHIDUL ISLAM 20121107007 Department of Applied Chemistry and Chemical Engineering. BSMRSTU
COURSE TITLE: CHEMICAL TECHNOLOGY-II COURSE NO: ACCE-462
Sucrose Formation in Sugar cane • Sucrose forms in sugar cane mainly by photosynthetic process. • The photosynthetic process is divided into two stage − Photo stage and − Synthesis stage
Sucrose Formation in Sugar cane • The photo stage proceeds in the presence of light • Synthesis stage is taken place in the darkness. • The chlorophyll catalyses this process.
Photo Stage • In this stage light energy is convert to chemical energy. • In leaves, water (H2O) molecules break down and form oxygen (O2), NADPH and ATP (energy carriers) in the presence of light and chloroplast. [ATP= Adenosine triphosphate] [NADPH= Nicotinamide adenine dinucleotide phosphate]
Photosynthesis process, Sucrose formation
Photo Stage
Synthesis Stage • CO2 is Converted into glucose. • The CO2 react with RuBP and energy from ATP and NADPH to form G3P (an energy-rich glucose) • The G3P is then converted into glucose. [RuBP= Ribulose-1,5-bisphosphate] [G3P= Glyceraldehyde 3-phosphate]
Photosynthesis process, Sucrose formation
Overall Photosynthetic process
Overall Reactions
Constituent of Sugar cane Name of Constituents Wt. Percentage Water 73-76 Solid substance 24-27 Fiber 3-5 Soluble solid substance 11-16 Juice constituent sugar 10-16
Constituent of Sugar cane juice Name of constituents Percentage Glucose 70-88 Fructose 2-4 Salt 2-4 Protein 0.1-0.5 Gums 0.506 Wax, fats, phosphates 0.3-0.5
Photosynthesis process, Sucrose formation
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Photosynthesis process, Sucrose formation

  • 2. RASHIDUL ISLAM 20121107007 Department of Applied Chemistry and Chemical Engineering. BSMRSTU
  • 3. COURSE TITLE: CHEMICAL TECHNOLOGY-II COURSE NO: ACCE-462
  • 4. Sucrose Formation in Sugar cane • Sucrose forms in sugar cane mainly by photosynthetic process. • The photosynthetic process is divided into two stage − Photo stage and − Synthesis stage
  • 5. Sucrose Formation in Sugar cane • The photo stage proceeds in the presence of light • Synthesis stage is taken place in the darkness. • The chlorophyll catalyses this process.
  • 6. Photo Stage • In this stage light energy is convert to chemical energy. • In leaves, water (H2O) molecules break down and form oxygen (O2), NADPH and ATP (energy carriers) in the presence of light and chloroplast. [ATP= Adenosine triphosphate] [NADPH= Nicotinamide adenine dinucleotide phosphate]
  • 9. Synthesis Stage • CO2 is Converted into glucose. • The CO2 react with RuBP and energy from ATP and NADPH to form G3P (an energy-rich glucose) • The G3P is then converted into glucose. [RuBP= Ribulose-1,5-bisphosphate] [G3P= Glyceraldehyde 3-phosphate]
  • 13. Constituent of Sugar cane Name of Constituents Wt. Percentage Water 73-76 Solid substance 24-27 Fiber 3-5 Soluble solid substance 11-16 Juice constituent sugar 10-16
  • 14. Constituent of Sugar cane juice Name of constituents Percentage Glucose 70-88 Fructose 2-4 Salt 2-4 Protein 0.1-0.5 Gums 0.506 Wax, fats, phosphates 0.3-0.5