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Sieve tube : an element of phloem tissue consisting of a longitudinal row of thin-walled elongated | 、、 。， sieve tube
sieve tube We can separate the stones out with a sieve. 。David has a head like a sieve. Perforated like a
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Sieve tube definition, a vertical series of sieve cells in the phloem, specialized for the conduction of food materials. See more.
Sieve tube definition is - 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 transloion of organic solutes. 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
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2009-7-13 · Abstract. Sieve elements are one of the least understood cell types in plants. Transloion velocities and volume flow to supply sinks with photoassimilates greatly depend on the geometry of the microfluidic sieve tube system and especially on the anatomy of sieve plates and sieve plate pores.
Sieve Tube Function Phloem function is closely related to sieve tube structure. Since we encounter many problems to investigate sieve tubes without inducing artifacts, the in vivo structure of sieve tubes is still a matter of debate and so is the transloion mechanism.
2018-9-21 · One or more companion cells attached to each sieve tube provide this energy. A sieve tube is completely dependent on its companion cell(s). Comparison of transport in the xylem and phloem.
sieve tube in American Botany a longitudinal tube in the phloem of flowering plants, consisting of a connected series of individual cells ( sieve cells ) and serving to
Alibaba offers 1,510 sieve tube products. About 2% of these are steel pipes, 1% are packaging tubes, and 1% are plastic tubes. A wide variety of sieve tube
Although the presence of proteins in sieve tube exudates has been recognized for many years, little is known about their function or metabolic stability. Mostefforts to charac-terize their biochemical properties have concentrated onthe structural proteins (P-proteins), which appear in fairly high
2018-10-23 · Sieve Tube members are associated with companion cells, which are cells that combine with sieve tubes to create the sieve element-companion cell complex. This allows for supply and maintenance of the plant cells and for signaling between distant organs within the plant. 
2018-10-23 · In vascular plants, phloem (pronunciation: Sieve tube cells do contain vacuoles and other organelles, such as ribosomes, before they mature, but these generally migrate to the cell wall and dissolve at maturity; this ensures there is little to impede the movement of fluids.
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2008-1-9 · We have used high-sensitivity capillary electrophoresis coupled to a laser-induced fluorescence detection method to quantify 16 amino acids in wheat ( Triticum aestivum ) sieve tube (ST) samples as small as 2 nL collected by severing the stylets of feeding aphids. The sensitivity of the method was sufficient to determine a quantitative amino acid profile of individual STs without the need
2013-5-12 · Sieve tubes of legumes (Fabaceae) contain characteristic P-protein crystalloids with controversial function. We studied their behavior by conventional light, electron, and confocal laser scanning microscopy. In situ, crystalloids are able to undergo rapid (<1 sec) and reversible conversions from the condensed resting state into a dispersed state, in which they occlude the sieve tubes.
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).
sieve tube  ; sieve opening ; test sieve  ; ; standard sieve  ; sieve residue