Stroma
Definition
The stroma is the fluid-filled space surrounding the grana (stacks of thylakoids) within the chloroplast where the "dark" reactions of photosynthesis (Calvin cycle) occur.
Analogy
Consider stroma as the factory floor where all raw materials are assembled into finished products. In this case, carbon dioxide and energy from ATP are used to create glucose.
Related terms
Chloroplasts: Organelles found in plant cells where photosynthesis occurs.
Grana: Stacks of thylakoids located within the chloroplasts where light-dependent reactions occur.
Calvin Cycle: The set of chemical reactions that take place in chloroplasts during photosynthesis, converting carbon dioxide into organic compounds.
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