noun[mass noun] Botany
The inner tissue (parenchyma) of a leaf, containing many chloroplasts.
- Thus, elements of the guard cell's response to stress are present in mesophyll and xylem parenchyma cells.
- Inactivation of plastids in the leaf mesophyll, which normally contains the majority of chloroplasts would be the most easily identified.
- Light dependence of zeaxanthin formation in hypocotyl and mesophyll chloroplasts of Arabidopsis seedlings
Mid 19th century: from meso- 'middle' + Greek phullon 'leaf'.
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