sieve tube

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 living cells characteristic of the phloem, having no nucleus when mature, and believed to function chiefly in translocation of organic solutes — compare companion cell, sieve cell, sieve plate

* * *

Bot.
1. a vertical series of sieve cells in the phloem, specialized for the conduction of food materials.
2. a single sieve cell.
[1870-75]

* * *

sieve tube noun (botany)
A conducting element in phloem, consisting of thin-walled cells connected end to end with sieve plates between adjacent members
• • •
Main Entry: ↑sieve

* * *

sieve tube,
Botany.
1. a tubelike structure composed of thin, elongated cells connected through perforations in their end walls, forming the essential element of the phloem of higher vascular plants: »

The thin-walled sieve tubes are often filled with colloidal material and have the appearance of containing live protoplasm (Fred W. Emerson).

2. one of the cells that make up this structure; sieve cell.

* * *

n. Botany a series of sieve tube elements placed end to end to form a continuous tube

Useful english dictionary. 2012.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • sieve tube — n. Bot. a longitudinal tube in the phloem of flowering plants, consisting of a connected series of individual cells (sieve cells) and serving to conduct organic food materials through the plant …   English World dictionary

  • sieve tube — sieve′ tube n. Bot. bot a vertical series of cylindrical cells in the phloem, specialized for the conduction of food materials • Etymology: 1870–75 …   From formal English to slang

  • sieve tube — Bot. 1. a vertical series of sieve cells in the phloem, specialized for the conduction of food materials. 2. a single sieve cell. [1870 75] * * * ▪ plant structure       in flowering plants, elongated living cells (sieve tube elements) of the… …   Universalium

  • sieve tube — /ˈsɪv tjub/ (say siv tyoohb) noun a longitudinal, food conducting, tubelike structure present in the phloem of angiosperms composed of sieve tube elements (cells containing cytoplasm but not nuclei) placed end to end with perforations (sieve… …  

  • Sieve tube element — in the plant, sieve elements are living cells. They are thick and circular and can be different colours.At the interface between two sieve tube members in angiosperms are sieve plates, pores in the plant cell walls that facilitate the movement of …   Wikipedia

  • sieve-tube element — noun or sieve tube member : a thin walled elongated living cell that has no nucleus at maturity, is continuous with other similar cells by protoplasmic strands which pass through the perforations of specialized sieve plates, prob. functions… …   Useful english dictionary

  • sieve-tube member — noun see sieve tube element …   Useful english dictionary

  • sieve tube — A tube within the phloem tissue of a plant, composed of joined sieve elements …   Glossary of Biotechnology

  • sieve tube — The structure within the phloem of higher plants that is responsible for transporting organic material (sucrose, raffinose, amino acids, etc.) from the photosynthetic tissues (eg. leaves) to other parts of the plant. Made up of a column of cells… …   Dictionary of molecular biology

  • sieve tube — noun Date: 1875 a tube consisting of an end to end series of thin walled living plant cells characteristic of the phloem and held to function chiefly in translocation of organic solutes …   New Collegiate Dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”