What are the raw mighty wheels needed for photosynthesis? Raw mighty wheels of photosynthesis are carbon dioxide and water. Water and carbon dioxide in the presence of light and other cells of the leaf. Where in the presence of chlorophyll photosynthesis takes place and sugar and oxygen are produced. And the role of water in photosynthesis is first identified by World Hallmet through his below plant experiment. Joseph Prishly in 1770s through his Belger experiment. First, I will invite the role of carbon dioxide in photosynthesis.