1. Number of leaves: If the number of leaves in the plant body is more, the amount of photosynthesis is more and if the number of leaves is less, the amount of photosynthesis is less.
2. Age of leaves: More photosynthesis occurs in middle aged leaves. Photosynthesis is low in young and old leaves.
3. Leaf structure: The rate of photosynthesis depends on the nature of the leaf, the arrangement of mesophyll cells and the number of stomata.
4. Protoplasm: A leaf with more protoplasm has a higher rate of photosynthesis.
5. Chlorophyll: If the amount of chlorophyll is high in the leaves, the amount of photosynthesis is high.
6. Sugar content: If sugar is high in the leaves, the rate of photosynthesis is low.
7. Potassium: If the amount of potassium in the leaves is low, the photosynthesis will decrease.
8. Enzymes: The amount of enzymes required controls the rate of photosynthesis.