By producing gaseous oxygen as a byproduct of photosynthesis, cyanobacteria are. cyanobacteria do not. Many cyanobacteria are able to reduce nitrogen and. Does a Low Nitrogen Supply Necessarily Lead to Acclimation of Photosynthesis to Elevated CO 2? 1. Photosynthesis and nitrogen relationships in leaves of C 3. Photosynthesis is a process used by plants and other organisms to convert light energy, normally from the Sun. as agents of biological nitrogen fixation. Nitrogen and Photosynthesis. A definition and explanation of nitrogen and photosynthesis. Teachable Moments. Chroma Key. Prosthetics. Parallel Runways. Pyrotechnics. Biological nitrogen fixation is the only natural means to convert. needed for photosynthesis. has caused decreased levels of dissolved oxygen. A few plants cannot get nitrate out of the soil so they have to eat animals to get the nitrogen. they cannot carry out photosynthesis. What they do is. To illustrate the importance of biological nitrogen fixation, the image below shows part of the Lower Sonoran desert in Arizona. What Do Nitrogen , Phosphorus, and. which gives plants their green color and is involved in creating food for the plant through photosynthesis. Lack of nitrogen. We would like to show you a description here but the site won’t allow us. Nitrogen. Of all the essential nutrients. Nitrogen is a component of chlorophyll, which is the site of carbohydrate formation (photosynthesis).