AP BIOLOGY

Detailed explanation-1: -Such a parenchyma type is called aerenchyma. It is a type of tissue with air gaps. It gives hydrophytes buoyancy, allowing them to float to the water’s upper surface. The buoyancy of floating plants is helped by aerenchyma.

Detailed explanation-2: -Basically aerenchyma is parenchyma tissue in aquatic plants.

Detailed explanation-3: –Aerenchyma is a special type of parenchyma. It is a plant tissue with larger gas spaces than those found in intracellular spaces. It forms in the roots and shoots of wetland species, as well as in the roots and shoots of some dryland species, under adverse conditions, either naturally or as a result of abiotic stress.

Detailed explanation-4: -15.2. Aerenchyma is a spongy tissue that forms spaces/air channels in the leaves, stems, and roots of halophytic plants (Santos et al., 2016). The presence of aerenchymatic tissues helps in exchange of gases between the shoot and the root systems.

Detailed explanation-5: -Gas-filled spaces (aerenchyma) are constitutively found in aquatic and semi-aquatic plants, and are considered to be an efficient mechanism to ameliorate low oxygen stress. Aerenchyma facilitate gas exchange between aerial and submerged plant parts by reducing the diffusion resistance to gas exchange imposed by cells.