What is apoplast and symplast concept?

What is apoplast and symplast concept?

Apoplast. Symplast. Apoplast refers to the non protoplasmic components of a plant, including the cell wall and the intracellular spaces. Symplast refers to the continuous arrangement of protoplasts of a plant, which are interconnected by plasmodesmata.

What is the relationship between symplast and apoplast?

Apoplast and symplast are two routes used by plants to transport water from root hair cells to the xylem of the root. Apoplast includes the non-living components of a plant such as cell walls and the intracellular spaces. Symplast includes the living components of a plant such as protoplasms.

What is symplast pathway in biology?

The symplastic pathway: It provides the movement of water from one cell to another cell by plasmodesmata. Symplast, is an inner side of the plasma membrane.

What are the apoplastic and symplastic pathways in plants?

The symplast pathway involves protoplasts, which are found within the living cytoplasm cells. In contrast, the apoplast pathway is a non-living route since the water solution moves in the spaces between cells and along the cell wall (no protoplasts involved).

What is apoplast in biology?

The apoplast is the space outside the plasma membrane consisting of intercellular spaces where the material diffuses freely. It does not involve protoplasm in the plant tissues but involves the non-living parts of the plant such as cell wall and intercellular spaces.

What is apoplast route in biology?

In the apoplast pathway (apoplastic route), water moves through the spaces between the cells and in the cells walls themselves. In the symplast pathway (symplastic route), water passes from cytoplasm to cytoplasm through plasmodesmata (Figure 17.1.

Who introduced the concept of apoplast and symplast?

Eduard Tangl discovered the symplastic pathway in 1879 and later Hanstein coined the term ‘symplast’ in 1880. M√ľnch coined the term ‘apoplast’ in 1930 and used both the terms, apoplast and symplast together for the first time to differentiate between the two.

What is meant by apoplastic pathway?

The apoplastic pathway is one of the two main pathways for water transport in plants, the other being symplastic pathway. In apoplastic transport, water and minerals flow in an upward direction via the apoplast to the xylem in the root.

What is apoplast pathway in biology?

In the apoplast pathway, water is transported from root hair to xylem through the cell wall of intervening cells. Apoplastic water movement beyond the cortex is blocked by the Casparian strip of endodermal cells. Hence, the symplastic route is utilised to deliver water and ions beyond the cortex.

What is apoplast in plants?

Nowadays, the apoplast is defined as the intercellular space filled with gas and water, contained between cell membranes, the interfibrillar and intermicellar space of the cell walls, and the xylem extending to the rhizoplane and cuticle of the outer plant surface (Figure 1).

  • September 29, 2022