A tracheid is a long and tapered lignified cell in the xylem of vascular plants. It is a type of conductive cell called a tracheary element. Angiosperms...

distinctive xylem cells are the long tracheary elements that transport water. Tracheids and vessel elements are distinguished by their shape; vessel elements...

sieve-tube elements. The xylem consists of vessels in flowering plants and of tracheids in other vascular plants. Xylem cells are dead hard-walled hollow cells...

gymnosperms, by having flowers, xylem consisting of vessel elements instead of tracheids, endosperm within their seeds, and fruits that completely envelop the...

suggest that by this period Sequoia ancestors had already evolved a greater tracheid diameter that allowed it to reach the great heights characteristic of the...

lignin, a polymer used to strengthen the secondary cell walls of xylem tracheids and vessels to keep them from collapsing when a plant sucks water through...

parenchyma cells, fibers, vessels, tracheids, and ray cells. Longer tubes made up of individual cellssels tracheids, while vessel members are open at each...

tissue composed of water-conducting tracheids or vessel elements, together with fibres and parenchyma cells. Tracheids are elongated cells with lignified...

fibre cells' evolutionary origin from tracheids exists.[citation needed] During evolution the strength of the tracheid cell walls was enhanced, the ability...

leaves. By the time they become competent to conduct water, all xylem tracheids and vessels have lost their cytoplasm and the cells are therefore functionally...

Surrounding both conducting tissues was a broad sheath of transfusion tracheids. Below the leaf scar the leaf-cushion tapered to a basal position. In...

trabs, trabis trabeculae trach- rough Greek τραχύς (trakhús) trachea, tracheids, tracheitis, tracheophyte, tracheostomy, tracheotomy, trachoma trag- he-goat...

Sap is a fluid transported in xylem cells (vessel elements or tracheids) or phloem sieve tube elements of a plant. These cells transport water and nutrients...

three directions, and strongly elongated tracheids. Tracheids make up more than 90% of timber volume. The tracheids of earlywood formed at the beginning of...

vessel elements in the gnetophytes were interpreted as being derived from tracheids with circular bordered pits, as in conifers. It however only gained strong...

gwynne-vaughanii that had xylem tracheids that were well reinforced by bands of lignin. The earliest macrofossils known to have xylem tracheids are small, mid-Silurian...

Wiktionary, the free dictionary. Sap is the fluid transported in xylem cells (tracheids or vessel elements) or phloem sieve tube elements of a plant. Sap may...

extent that the filter plates in the pores between the wood's component tracheids had rotted away, perhaps while the wood was stored in or under water in...

Cone-bearing plant Conifers Cones containing seeds and wood composed of tracheids 629 extant Prasinodermophyta Prasinoderma-like plants Picozoans, picobiliphytes...

dimensions of lumens and the thickness of walls in the conducting cells (tracheids, vessels), fibers, and various ray properties. The structural attributes...

the cell wall that is perforated; present in vessel members but not in tracheids. Should not be confused with a pit. perianth The collective term for the...

endophytes. Mosses differ from vascular plants in lacking water-bearing xylem tracheids or vessels. As in liverworts and hornworts, the haploid gametophyte generation...

roots to the shoots. Two kinds of cell are involved in xylem transport: tracheids and vessel elements. Vessel elements are the building blocks of vessels...

they appear to have no (visible) pores because of the presence of tracheids. Tracheids are a primitive element of xylem (fluid-conducting tissues). They...

branching. It seems probable that the xylem, comprising a solid strand of tracheids, was centrarch.": 216  However, Edwards and Edwards also decided to include...

and wide". There was a central vascular cylinder consisting of annular tracheids (water-conducting cells with thickened walls). Six other species were...

vascular system composed of eustele and bifacial vascular cambium. The tracheids in the secondary xylem rays have pitting that occurs only on the walls...

cellulose fibrils are not continuous, meaning that there are two independent tracheid structures in “older” trees meeting different mechanical requirements....

plants. The sap vaporizes locally so that either the vessel elements or tracheids are filled with water vapor. Plants are able to repair cavitated xylem...

availability in the rooting medium also affects the size and structure of tracheids formed in the long lateral roots of white spruce (Krasowski and Owens...