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sieve tube
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sieve tube
noun Botany.
1.
a vertical series of sieve cells in the phloem, specialized for the conduction of food materials.
2.
a single sieve cell.
Origin:
1870–75
1870–75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Sieve tube
is always a great word to know.
So is autotroph. Does it mean:
| plants with true roots, stems and leaves dispersed by spores because they don't produce seeds |
| organism capable of self-nourishment which uses photosynthesis or chemosynthesis for energy |
Collins
World English Dictionary
| sieve tube | |
| —n | |
| botany an element of phloem tissue consisting of a longitudinal row of thin-walled elongated cells with perforations in their connecting walls through which food materials pass | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Encyclopedia Britannica
Encyclopedia
sieve tube
in flowering plants, elongated living cells (sieve-tube elements) of the phloem, the nuclei of which have fragmented and disappeared and the transverse end walls of which are pierced by sievelike groups of pores (sieve plates). They are the conduits of food (mostly sugar) transport.
Learn more about sieve tube with a free trial on Britannica.com.
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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