- Perforated end walls separating the component cells (sieve elements) that make up the phloem sieve tubes in vascular plants. The perforations permit the flow of water and dissolved organic solutes along the tube, and are lined with callose. The plates are readily blocked by further deposition of callose when the sieve tube is stressed or damaged.
Dictionary of molecular biology. 2004.
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sieve plate — noun or sieve disk : a wall or portion of a wall between sieve tube elements containing one or more sieve areas compare compound sieve plate, sieve tube * * * sieve plate noun (botany) A perforated area by which a sieve tube connects with another … Useful english dictionary
sieve plate — Perforated wall area in a sieve tube element, through which strands connecting sieve tube protoplasts can pass … Glossary of Biotechnology
sieve plate — noun Date: 1875 a perforated wall or part of a wall at the end of one of the individual cells making up a sieve tube … New Collegiate Dictionary
sieve plate — 1. (ECHINODERMATA) see madreporite. 2. (PORIFERA) A plate like porous structure below the osculum … Dictionary of invertebrate zoology
sieve plate — (Class Ostracoda): Minute, perforated plate covering pore in valve; may be associated with seta [Stachowitsch, 1992] … Crustacea glossary
sieve-plate — … Useful english dictionary
compound sieve plate — noun botany : a sieve plate having the sieve areas in groups separated by a network or bar of cell wall material … Useful english dictionary
spiracular sieve plate — (ARTHROPODA: Insecta) A platelike sclerite covering the spiracle that functions to exclude entry of dust or water into the tracheal system … Dictionary of invertebrate zoology
sieve tube — noun tube formed by cells joined end to end through which nutrients flow in flowering plants and brown algae • Hypernyms: ↑vascular tissue • Part Holonyms: ↑phloem, ↑bast * * * noun : a tube consisting of an end to end series of thin walled… … Useful english dictionary
sieve cell — noun : an elongated tapering cell characteristic of the phloem of gymnosperms and lower vascular plants that is basically similar in form, function, and relationships to a sieve tube element but distinguished by rather uniformly distinguished… … Useful english dictionary