We know that the word equation for the reaction taking place during photosynthesis is:
carbon dioxide + water + sunlight → glucose + oxygen
Therefore, the more the reactants are provided, the more the plant will grow. The lesser the reactants, the lesser the growth. Providing products will not alter the rate of photosynthesis. The factors may be grouped as:
Increase plant growth:
-increase sunlight
-increase carbon dioxide
-increase water
No effect on plant growth:
-increase glucose
-increase oxygen
-decrease glucose
-decrease oxygen
Decrease plant growth:
-decrease water
-decrease sunlight
-decrease carbon dioxide
