In the process of photosynthesis, the carbon source that does not produce oxygen and photosynthesis has its own unique characteristics. The carbon source that does not produce oxygen and photosynthesis is mostly taken from inorganic carbon. Such as carbon dioxide, which is often an important uptake object. In this process, photosynthetic microorganisms absorb carbon dioxide through a specific mechanism.

Take purple sulfur bacteria as an example. In the light environment, they can cleverly use their own photosynthetic system to capture carbon dioxide, and through a series of complex biochemical reactions, gradually assimilate carbon into their own metabolic system to form the basis for growth and reproduction. There are green sulfur bacteria, which also follow a similar route and use carbon dioxide as a carbon source, playing a unique role in the ecosystem.

The carbon source of oxygen-free photosynthesis is extraordinary, and it is a key factor in maintaining the survival and development of such special photosynthetic organisms. It also plays an important role in the material cycle and energy conversion of ecology.