sieve tube

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 (sieve elements) connected by sieve plates.

Dictionary of molecular biology. 2004.

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  • 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 — 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 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 — 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

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