What are sieve tube members connected by?

Sieve tube members and companion cells are connected through plasmodesmata. Plasmodesmata consists of channels between cell walls of adjacent plant cells for transport and cell to cell recognition.

Is sieve tube and sieve cell same?

Sieve tubes are syncytes (aggregation of cells), placed vertically one above the other forming long tubes. Sieve cells are less specialized sieve elements of phloem. Sieve tubes are much specialized sieve elements of phloem. Sieve cells are long and narrow cells with tapering end walls.

Are sieve tubes connected to each other?

Sieve tubes consist of sieve elements which are elongated cells, connected to each other via sieve plates to form a continous tube system that spreads out through the entire plant.

How are sieve tubes and companion cells connected in phloem?

Both the companion cells and the sieve tube cells are derived from the same mother cell. Now, both these cells are connected by channel-forming cells called plasmodesmata. The plasmodesmata form porous channels between the two cells by traversing the thin cell walls of both sieve tube element cells and companion cells.

What is the difference between sieve tubes and companion cells?

Difference Between Sieve Tubes and Companion Cells Definition. Sieve tubes refer to a series of sieve tube elements placed end to end to form a continuous tube while companion cells refer to a specialized parenchyma cell, located Size. Sieve Plates. Pores in the Transverse Wall. Nucleus and Ribosomes. Amount Mitochondria. Metabolic Activity. Function. Conclusion.

Where are sieve tube cells found?

Although the function of both of these kinds of sieve elements is the same, sieve cells are found in gymnosperms , non-flowering vascular plants, while sieve tube members are found in angiosperms , flowering vascular plants.

Do sieve cells have nucleus?

Sieve tubes are the sieve elements present in angiosperms . They are elongated large cells that have pores in their transverse walls. Moreover, at the young stage, sieve tubes have a nucleus.

What is the function of sieve tube in plants?

What You Need To Know About Sieve Tubes (Characteristics) Sieve Tubes are a series of cells placed end to end to form a continuous tube. The sieve tubes are usually living cells with an elongated structure. Sieve tubes contain fewer mitochondria. Sieve tubes are responsible for the transport of food throughout the plant body.