What tissues contain sieve tubes?

What tissues contain sieve tubes?

phloem
The sieve tube is the conducting element of the phloem. It is formed from a vertical series of elongated cells, interconnected by perforations in their walls in areas known as sieve plates.

Is the sieve tube a tissue?

Sieve elements are specialized cells that are important for the function of phloem, which is a highly organized tissue that transports organic compounds made during photosynthesis. Sieve elements are the major conducting cells in phloem.

Which type of tissue contains sieve tubes and companion cells?

…angiosperms are sieve tubes and companion cells found in the phloem (see angiosperm: Vascular tissue).

Is sieve tube a part of xylem tissue?

It is composed of sieve tube, sieve plates, companion cell, phloem parenchyma and phloem fibre. 3. It transports water and mineral from roots to other parts of the plant….Tissues.

What is called sieve tube?

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.

Where are sieve tubes found?

Sieve tubes are found in the phloem vascular tissue. Sieve tubes are located in vascular plants that flower called angiosperms.

What is the function of Collenchyma tissue?

Collenchyma tissue is composed by elongated living cells of uneven primary thick walls, which possess hemicellulose, cellulose, and pectic materials. It provides support, structure, mechanical strength, and flexibility to the petiole, leaf veins, and stem of young plants, allowing for easy bending without breakage.

Why are sieve tubes called so?

Sieve cells are also associated with gymnosperms because they lack thecompanion cell and sieve member complexes that angiosperms have. Their narrow pores are necessary in their function in most seedless vascular plants and gymnosperms which lack sieve-tube members and only have sieve cells to transport molecules.

Which cell is living but without nucleus?

Complete answer: >Option A:- A cambium cell in plants is defined as a tissue layer providing partially undifferentiated cells which are prerequisite for the growth of the plants. These cells are present amidst both the xylem and phloem. They show no true nucleus. Therefore, this is the correct option.

What kind of cells are in a sieve tube?

…of various specialized cells called sieve tubes, companion cells, phloem fibres, and phloem parenchyma cells. Primary phloem is formed by the apical meristems (zones of new cell production) of root and shoot tips; it may be either protophloem, the cells of which are matured before elongation (during growth) of the….

How is the sieve tube formed in the phloem?

The sieve tube is the conducting element of the phloem. It is formed from a vertical series of elongated cells, interconnected by perforations in their walls in areas known as sieve plates. The perforations may be restricted to smaller areas, sieve fields, several of which are contained in each sieve plate.

How are sieve tubes supported and kept alive?

The main function of the sieve tube is the transport of carbohydrates, primarily sucrose, in the plant. Likewise, how are sieve tubes supported and kept alive? Each STM is a living cell. They have to be alive because phloem transport only occurs in living cells with intact, functioning plasma membranes.

When was the sieve tube element first discovered?

Sieve elements were first discovered by the forest botanist Theodor Hartig in 1837. Since this discovery, the structure and physiology of phloem tissue has been emphasized more as there has been greater focus on its specialized components such as the sieve cells.