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PLANTS ADAPTION TO LIVE IN THE AQUATIC LIFE.

PLANTS ADAPTION TO LIVE IN THE AQUATIC LIFE. Plant adaptations…. Aquatic plants are plants that have adapted to living in aquatic environments [salt water or fresh water] They are also referred to as hydrophytes or macrophytes. Floating plants are of two types

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PLANTS ADAPTION TO LIVE IN THE AQUATIC LIFE.

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  1. PLANTS ADAPTION TO LIVE IN THE AQUATIC LIFE.

  2. Plant adaptations… • Aquatic plants are plants that have adapted to living in aquatic environments [salt water or fresh water] They are also referred to as hydrophytes or macrophytes.

  3. Floating plants are of two types • Floating plants which are rooted with floating leaves (e.g. Water lily) • And those floating plants which are not rooted in the sediment but just float on the surface e.g. (Duckweed) Floating leaves are generally tough because they have to withstand the weather and water movement.

  4. The presence of little or no mechanical strengthening tissue in stems and leaf petioles. If these plants are removed from the water, they hang limply. They are normally supported by water all around them and so have no need of Mechanical strengthening.

  5. In some submerged plants, leaves are divided which allows water to flow past them easily without causing any damage to them and has the advantage of creating a large surface area for absorption & photosynthesis it also reduce water resistance. • Roots which normally play a very important role in the absorption of nutrients and water from the substrate, are often also reduced and their main function is anchorage.

  6. The root hairs which function in absorption are often absent and roots themselves may be entirely dispensed with (e.g.Bladderwort) • Air filled cavities often extend throughout the leaves & stems of aquatic plants, providing an Internal atmosphere

  7. The green pigment containing chloroplasts important for Photosynthesis are restricted to the upper surface of the leaves which are the only surface to be well lit. Stomata (breathing pores), through which gas exchange takes place in the leaf, are also found only on the upper surface of the leaf. • This upper surface often has a thick waxy cuticle to repel water and help to keep the stomata open and clear.

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