Neblux Knowledge Graph
Photosynthesis
Photosynthesis is a biochemical process by which plants, algae, and cyanobacteria convert light energy, water, and carbon dioxide into carbohydrates and molecular oxygen using chlorophyll as a light-capturing mechanism.
Overview
In plants and algae, light-dependent reactions in chloroplast thylakoid membranes produce ATP and NADPH, and the Calvin cycle in the chloroplast stroma uses these carriers to fix carbon dioxide into organic compounds. Cyanobacteria carry out the corresponding processes without chloroplasts, using photosynthetic membranes and the cytoplasm. Oxygenic photosynthesis performed by ancient cyanobacteria roughly 2.7 billion years ago contributed to the Great Oxidation Event, substantially altering Earth’s atmosphere.
Why it matters
Photosynthesis serves as a primary energy source for biological systems, producing atmospheric oxygen and supporting terrestrial food webs. In addition, photosynthetic carbon fixation plays a major role in global carbon cycles, motivating research into artificial photosynthesis for renewable fuel production.
Related concepts
- BiologylogicalPhotosynthesis is the fundamental energy-capturing process supporting virtually all food webs and ecosystems on Earth through primary production
- ChemistrylogicalPhotosynthesis is a complex series of redox reactions involving electron transport chains, proton gradients, and carbon fixation cycles studied through biochemistry
- EngineeringappliedArtificial photosynthesis and bio-inspired solar cell research attempt to replicate the near-perfect quantum efficiency of natural light-harvesting complexes for renewable energy generation
- Environmental ScienceappliedPhotosynthetic carbon fixation removes approximately 120 gigatons of CO₂ from Earth's atmosphere annually, making it central to understanding and mitigating climate change