noun[mass noun] Botany
A respiratory process in many higher plants by which they take up oxygen in the light and give out some carbon dioxide, contrary to the general pattern of photosynthesis.
- Oxygen can also be reduced in the processes of photorespiration.
- It was suggested above that one proton was released in the chloroplast stroma for every three oxygen molecules fixed during photorespiration.
- It is therefore likely that photorespiration of herbaceous leaves is driven by a large carbon pool.
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