Sclereid


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sclereid

[′sklir·ē·əd]
(botany)
A thick-walled, lignified plant cell typically found in sclerenchyma.

Sclereid

 

a structural component of the sclerenchyma, that is, the mechanical tissue of plants. Sclereids derive from the parenchyma or, less frequently, the prosenchyma cells as a result of sclerification. Their layered and often mineralized walls have numerous porous canals. The most common type of scler-eid cell is a stone cell, or brachysclereid. (Sometimes the term “stone cells” is used to designate all sclereids.)

References in periodicals archive ?
Tomlinson (1959) described sclereids in several palm genera.
Structure and distribution of sclereids in the leaves of palms.
Vascularization terminal tracheids have no sclereids, (Fig.
oxypetala, and elongated sclereids (arrows) traversing the palisade parenchyma (Figure 2B) occur in N.
The blade margin is patterned similarly for all evaluated species, with a layer of regular parenchyma (Rp), without supporting tissue, the absence of palisade parenchyma (Pp), and the presence of sclereids (S), vascular bundle (Vb), stomata and hydropoten (Hd).
For all seven species, there is a similarity in the anatomical pattern of the midrib mesophyll formed by a parenchymal cortex with vascular bundles arranged in regular formation, with the region inside the cortex consisting of regular aerenchyma (As) with sclereids (S--arrows) projected on the inside of the lacunae (Figure 3C).
The large amount of sclereids inside the lacunae offers resistance, as these species do not have supporting tissues (Sculthorpe, 1967).
Sculthorpe (1967) also describes star-shaped sclereids that project into the lacunae of the spongy tissue in members of the family Nymphaeaceae.
Elongated sclereids found in the mesophyll of some species, according to Evert (2006), consist of immature cells; upon the development of the organ, they will reach both surfaces of the epidermis.
Han, "A study on relationship between the structure and morphology of the sclereids and the quality of pear fruit," Journal of Laiyang Agricultural College, vol.