Cells of parenchymatous tissues are characterised by :-a)Uniform thickeningb)Thickening at cornersc)Liquefied wallsd)Intercellular spacesCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Answer

Parenchyma is a simple tissue which is composed of thin-walled polyhedral, isodiametric living cells with sufficient cytoplasm and one or more nuclei. These tissues serve the purpose of storage, photosynthesis gaseous exchange and much more but do not provide mechanical support to the plant and hence, lack cell wall thickening or lignin deposition which is a characteristic feature of mechanical tissues. They have cellulosic cell wall without any thickening or lignin deposition. Parenchymatous cells are characterized by the presence of well-developed intercellular spaces, as in the case of aerenchyma.
Therefore, the correct answer is option D.

Answer

Cells of parenchymatous tissues are characterised by Intercellular spaces.

Parenchyma is a type of simple permanent tissue that is found in various parts of the plant. It is composed of relatively unspecialized cells that have thin cell walls and large intercellular spaces. These cells are alive and possess the ability to divide and differentiate into other types of cells.

The characteristic feature of parenchyma cells is the presence of intercellular spaces. These spaces are present between the cells and allow the movement of gases, water, and nutrients within the tissue. The intercellular spaces provide a pathway for the exchange of gases during photosynthesis and respiration. They also allow for the movement of water and minerals from the roots to the leaves.

The presence of intercellular spaces also helps in the storage of food and water. In some plants, the parenchyma cells function as storage organs and store starch, oils, and water. The large intercellular spaces allow for the expansion and contraction of these cells as they store or release these substances.

Moreover, the intercellular spaces in parenchyma tissues also play a role in providing mechanical support to the plant. The presence of these spaces reduces the density of the tissue, making it lighter and more flexible. This flexibility allows the plant to withstand external forces such as wind and rain.

Additionally, the intercellular spaces in parenchyma tissues aid in the diffusion of gases and the exchange of nutrients between cells. They provide a larger surface area for the exchange of molecules, facilitating efficient transportation within the tissue.

In summary, the characteristic feature of parenchyma cells is the presence of intercellular spaces. These spaces enable the movement of gases, water, and nutrients within the tissue, provide storage capacity, offer mechanical support, and facilitate diffusion and exchange of molecules between cells.

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