Photosynthesis- Limiting Factors of Photosynthesis using TM

Chlorophyll- is founds in the thylakoids of chloroplasts in photosystems (Green) and absorbs light to excite electrons

Action spectre for photosynthetic pigments in chloroplasts:

Chlorophyll A- Most abundant better absorbance at 420 or 680nm and is mostly in PSI

Chlorophyll B- Mostly in PSII (Both A and B are primary pigments and are reaction centres)

Carotene- Accessory pigment and are light-harvesting systems which help PSI and II

Mostly absorb red and blue light from sun, green is not as it is reflected

Limiting factors-That when they are not present photosynthesis is not at its optimum

• Chlorophyll concentration- Can’t be manipulate by Farmers

• Light intensity- More light the high the rate of photosynthesis as more energy to chlorophyll to excite the electrons more ATP and NADPH made (Artificial light)

• Temperature -Increase temperature will increase photosynthesis however if increased to much it will denature enzymes (Rubisco) and permeability of a membrane so rate decreases (Has an optimum) stomata will close to not loss water therefore carbon is not allowed into the chloroplast (Green houses)

• Carbon dioxide concentration-Increase carbon dioxide will increase photosynthesis - without it Co2 cannot fixate to RuBP to form organic substances

  Always a maximum rate therefore another factor will become limiting (Burn perfin to create carbon dioxide)

Fertilizers can also provide nutrients as well but these can be costly