What are the characteristics features of phloem?

Phloem is the vascular tissue in charge of transport and distribution of the organic nutrients. The phloem is also a pathway to signaling molecules and has a structural function in the plant body. It is typically composed of three cell types: sieve elements, parenchyma, and sclerenchyma.

What are the function of phloem?

While the main role of the phloem tissue is to transport carbohydrates from sources to sinks through the sieve elements, phloem is also composed of parenchyma cells, which play a key role in the storage of water, non-structural carbohydrates and storage proteins (Rosell 2016).

What is the structure of phloem?

The phloem is composed of three types of cells – the conducting cells, the parenchyma cells and the supportive cells. The conducting cells, also called sieve elements, are composed of columns of sieve tube cells that have perforations in their lateral walls and that helps in the conduction of food throughout the plant.

What are characteristics of transport of food in phloem?

Phloem consists of various elements – phloem parenchyma, phloem fibers, companion cells, and sieve tubes. The transportation of food in plants through phloem is bidirectional i.e., in both upward and downward directions. ATP is very essential for the process of translocation to occur.

What is phloem made of?

Phloem consists of living cells. The cells that make up the phloem are adapted to their function: Sieve tubes – specialised for transport and have no nuclei . Each sieve tube has a perforated end so its cytoplasm connects one cell to the next.

What are the four types of phloem?

Answer. In angiosperms it possesses four components of phloem. They are sieve tubes, phloem parenchyma, phloem fibres and companion cells.

What is the difference between phloem and xylem?

The vascular system is comprised of two main types of tissue: the xylem and the phloem. The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots.

Why is phloem a living tissue?

Phloem is living tissue, responsible for transporting food and other organic materials. Xylem consists of dead cells (parenchyma is the only living cells present in the xylem). Pholem mainly contains living cells (fibres are the only dead cells in the phloem).

What is mechanism of phloem transport?

Mechanism of Phloem Transportation

Sieve tubes in the phloem form long columns with holes in the end walls. Cytoplasmic strands pass through these holes forming a continuous channel.

What are the functions of phloem and xylem?

The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots. Xylem cells constitute the major part of a mature woody stem or root.

What is the function of xylem and phloem Class 9?

What are the functions of xylem and phloem? Xylem and phloem facilitate the transportation of water, minerals and food throughout the plant. Xylem carries water and minerals from the roots to the leaves. Whereas, phloem carries the food prepared by the leaves to different parts of the plant.

What is phloem class 9th?

Phloem is the other complex tissue system in the plants. It is the food conducting tissues of the vascular plant. The materials (food), i.e. (towards the root and stem) can move in both directions because phloem transports food and water from leaves to all plant parts. All phloem cells are living except phloem fibres.

What is the main function of xylem?

Xylem is the specialised tissue of vascular plants that transports water and nutrients from the plant–soil interface to stems and leaves, and provides mechanical support and storage.

Why is phloem a living tissue?

Phloem is living tissue, responsible for transporting food and other organic materials. Xylem consists of dead cells (parenchyma is the only living cells present in the xylem). Pholem mainly contains living cells (fibres are the only dead cells in the phloem).

What transports phloem?

Phloem transports carbohydrates, produced by photosynthesis and hydrolysis of reserve compounds, to sink tissues for growth, respiration and storage. At photosynthetic tissues, carbohydrates are loaded into phloem (Rennie and Turgeon 2009), a process that raises the solute concentration.