However, many hydrophytes have well developed root systems. For example, Eichhornia and Pistia have well developed adventitious roots. In these. A level OCR Biology on plant adaptations to water availability. Examines the adaptations made by hydrophytes and their importance.

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Morphological and Physiological Adaptations of Hydrophytes

Mechanical support would be disadvantage as it would limit flexibility in the event of changes in water level or water movements. What would you need? Thus the roots don’t have to depend on getting oxygen from the soil.

The epidermis usually lacks cuticle or periderm and stomata are not present in the submerged leaves. This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes. The leaves of free floating hydrophytes are smooth and shining and coated with wax.

Adaptation of Hydrophytes

The presence of mucilage on the aerial organs seems also an adaptation for protecting them from getting wet. Will my weight affect med school chances? Nympha ea and Nelumbium. In hydrophytes, the osmotic concentration of the cell sap 3 equal to or slightly higher than the surrounding water.


Cuticles primarily prevent water loss, thus most hydrophytes have no need for cuticles. These roots grow to reach the surface above the water in order to obtain CO2 to survive.

Extensive Shallow Root System: Study tools and advice 12 tips to get top grades Interactive study planner Free learning resources. 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. My presentations Profile Feedback Log out.

Here the adaptations of hydrophytes are discussed under three headings: They usually have larger, thinner leaves compared to xerophytes, sometimes with a greater number of stomata on the undersides of leaves. The propagation of most hydrophtes is vegetative. The presence of little or no mechanical strengthening tissue hyydrophytes stems and leaf petioles. Answer Now and help others.

Rapid Early Shoot Growth: In hyper-arid deserts, there is no rain, wind speed is very high, and night is extremely cold. In India, hot springs are scattered in many parts of the country. This helps in keeping the buoyancy of plants and facilitates exchange of gases. Anyone who has knowledge on the topic “aquatic adaptations of hydrophytic plants”, please share it with me. The vent animals also possess other physiological adaptations in nutrition and respiration to cope with toxic hydrogen sulphide.


The vent fauna consists of annelid and pogonophoran tubeworms, bivalve molluscs and some decapod crustaceans. It is possible that hydrophytes developed concurrently with land plants. They are normally supported by water all around them and so have no need of mechanical strengthening.

Revision:Xerophytes and Hydrophytes | The Student Room

Oryza sativa, Marsilea, Sagittaria. The rolled leaf and hairs both serve to trap moist air so reducing transpiration.

Count to a million Part 34 Started by: Stomata that are open most of time: The hypodermis is poorly developed. The epidermis is used as an absorbing or photosynthesizing organs rather than a protecting organ.

Ecological Adaptations of hydrophytes: Download the PPT of this Topic…. In the submerged portions of the plants the sclerenchyma is totally absent or hydrophytfs developed.

All aquatic plants however, flower out of the water.