| 释义 |
sclereid
scler·e·id S0150700 (sklĕr′ē-ĭd)n. A thick-walled lignified sclerenchyma cell. Sclereids are variable in shape and are shorter than fibers.
[sclere(nchyma) + -id.]sclereid or sclereiden (Biology) a type of biological, thick- walled cellSclereid
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.) sclereid
sclereid (sklĕr′ē-ĭd)n. A thick-walled lignified sclerenchyma cell. Sclereids are variable in shape and are shorter than fibers.sclereid a type of SCLERENCHYMA cell of higher plants, which is roughly spherical in shape with a thick wall that can be smooth or spiky and is always heavily impregnated with LIGNIN. Sclereids occur in the flesh of succulent fruits such as pears, and are common in the shells of nuts. |