sieve-tube element

An elongated, food-conducting cell in phloem in angiosperms. Unlike the tracheary elements of xylem, sieve elements have living protoplasts when mature, but they lack a nucleus and are dependent upon companion cells for certain functions. At the ends of each sieve-tube element are sieve plates, areas of the cell wall containing numerous large pores. The sieve-tube elements are aligned end to end and form continuous tubes, along which nutrients flow relatively unimpeded from cell to cell through the sieve plates. Sieve-tube elements are more specialized than the sieve cells found in gymnosperms. Compare sieve cell.

Words nearby sieve-tube element

sieve graft, sieve of Eratosthenes, Sievers, sievert, sieve tube, sieve-tube element, Sieyès, sif, sifaka, Sifrei Torah, sift

单词	sieve-tube element
释义	sieve-tube element An elongated, food-conducting cell in phloem in angiosperms. Unlike the tracheary elements of xylem, sieve elements have living protoplasts when mature, but they lack a nucleus and are dependent upon companion cells for certain functions. At the ends of each sieve-tube element are sieve plates, areas of the cell wall containing numerous large pores. The sieve-tube elements are aligned end to end and form continuous tubes, along which nutrients flow relatively unimpeded from cell to cell through the sieve plates. Sieve-tube elements are more specialized than the sieve cells found in gymnosperms. Compare sieve cell. Words nearby sieve-tube element sieve graft, sieve of Eratosthenes, Sievers, sievert, sieve tube, sieve-tube element, Sieyès, sif, sifaka, Sifrei Torah, sift The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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