Aerenchyma is related with

✅ Explanation: As explained in the previous question, ethylene is the hormone directly responsible for inducing the formation of aerenchyma tissue. It triggers the cell death and lysis that create the characteristic air spaces in aerenchyma.

🔑Key Points :

• Aerenchyma is a tissue that consists of large air spaces or air channels in the leaves, stems, and roots of some plants, mostly in aquatic plants and some wetland plants. The presence of these air-filled cavities provides these plants with several essential advantages:
-Gaseous Exchange and Respiration: Aerenchyma enables the efficient transportation of gases between different parts of the plant. For example, the oxygen produced in photosynthetic tissues can be transported to roots submerged in water or compacted soil, which might otherwise become oxygen-starved. This provides a more efficient respiration process, even when the plant is submerged or under stress due to water-logging conditions.
-Buoyancy: In aquatic plants, aerenchyma can help provide buoyancy, enabling leaves or stems to float on the surface of the water and therefore maximizing access to sunlight for photosynthesis.
-Reduces Metabolic Cost: The formation of aerenchyma often occurs through a process of cell degeneration, which reduces the overall metabolic cost of maintaining these cells for the plant, a potentially important adaptation under conditions where resources are restricted.
-Resistance to Drought and Other Stresses: Aerenchyma is also found in some terrestrial plants that live under stress conditions such as drought, high salinity, or heavy metal toxification. It assists in internal oxygen diffusion during these stress conditions.