Stone Cells

Stone Cells

 

or sclereids, plant cells with considerably thickened, stratified, lignified, sometimes suberized or cutinized walls frequently saturated with calcium salts or silica and pierced by pore canaliculi. Mature stone cells have no live contents.

Stone cells solidify tissues. The commonest are short stone cells, or brachysclereids, which are arranged in groups, or concretions, in fruit pith (pear, quince, chokeberry), rhizomes (peony, anemone), roots (horseradish), and phloem (oak, beech); less commonly, they form solid layers in the pericarp of nuts and acorns and cherry and plum pits. Elongated stone cells, or mac-rosclereids, usually form a solid layer in the seed coat (bean). Solitary stone cells, or idioblasts, are usually star-shaped (as-terosclereids) and found in fir bark, yellow water lily stems, and petioles; others extend from the top to bottom pellicle of a leaf, thereby making it tougher (tea, camellia).

O. N. CHISTIAKOVA

References in classic literature ?
Stumbling on as well as he could, beneath the unusual burden of these fetters, he was conducted to a strong stone cell, where, fastening the door with locks, and bolts, and chains, they left him, well secured; having first, unseen by him, thrust in Grip, who, with his head drooping and his deep black plumes rough and rumpled, appeared to comprehend and to partake, his master's fallen fortunes.
With this, the undertaker's wife opened a side door, and pushed Oliver down a steep flight of stairs into a stone cell, damp and dark: forming the ante-room to the coal-cellar, and denominated 'kitchen'; wherein sat a slatternly girl, in shoes down at heel, and blue worsted stockings very much out of repair.
The public will be able to step into the dark stone cells in the bowels of Carrickfergus Castle, Co Antrim, where for centuries prisoners were held captive and even tortured.
The next few nights were spent in stone cells, approximately 8ft by 6ft, sleeping on piles of blankets.
STRIPPED them of their uniforms, manhandled them and half-starved them; LOCKED them up alone in tiny stone cells for days at a time, with little food and no contact with each other;