Sieve element, in vascular plants, elongated living cells of the phloem. The nuclei of sieve element cells have fragmented and disappeared and the transverse end walls are pierced by sievelike groups of pores. They are the conduits of food transport from the leaves to …

Sieve elements' major function includes transporting sugars over long distance through plants by acting as a channel. Sieve elements elongate cells containing sieve areas on their walls. Pores on sieve areas allow for cytoplasmic connections to neighboring cells, which allows for the movement of photosynthetic material and other organic ...

Phloem (/ ˈfloʊ.əm /, FLOH-əm) is the living tissue in vascular plants that transports the soluble organic compounds made during photosynthesis and known as photosynthates, in particular the sugar sucrose, [1] to the rest of the plant. This transport process is called translocation. [2] .

Sieve tubes, found in angiosperms, are living cells that are associated with companion cells. The association with companion cells helps in distant transportation within the plant cells. The sieve tubes are made up of longitudinal arrangement of sieve tube members from end to end.

Sieve pores of the sieve plates connect neighboring sieve elements to form the conducting sieve tubes of the phloem. Sieve pores are critical for phloem function. From the 1950s onwards, when electron microscopes became increasingly available, the ...

Dec 12, 2024 · Phloem Sieve Tube Elements & Companion Cells: Structure & Function. The function of phloem tissue in a plant is to: Transport organic compounds (assimilates), particularly sucrose, from the source (e.g. leaf) to the sink (e.g. roots). The transport of these compounds in phloem tissue can occur up and down the plant

Sieve elements are thin-walled cells that are alive at maturity, although the protoplast is greatly changed, and they generally lack nuclei. Sieve elements are elongated and function as the basic photosynthate-conducting cell type in the phloem of vascular plants.

A sieve tube is a prime component of the phloem tissue present in the angiosperms. These cells are accompanied by companion cells forming an elegant transportation system to deliver carbohydrates and other organic compounds to the rest of the plant parts. Sieve tubes and companion cells are dominantly present in this tissue.

Jan 20, 2021 · The sieve element refers to the main conductive cell in the phloem. It is a living cell with a protoplast although the nucleus is absent at maturity. There are also fewer organelles. It is a special type of sclerenchyma cell. However, the cell wall is not lignified.

phloem, plant vascular tissue that conducts foods made in the leaves during photosynthesis to all other parts of the plant. Phloem is composed of various specialized cells called sieve elements, phloem fibres, and phloem parenchyma cells.