How is aerenchyma useful in aquatic plants?
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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.
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The spongy tissue that forms air spaces between the cells of leaves, stems and roots of some plants are called aerenchyma cells. It helps in the gaseous exchange between the shoot and the root and also provides buoyancy to the aquatic plants.
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