Question

How do xerophtes control the loss of water

Answer 1

Hello!!
They will have throns on it.And they are mostly found in deserts.So animals in deserts will try to eat these plants where they will protect them by It's thrones.
This is one of the reasons for not lossing of water

Answer 2

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Revision:Xerophytes and Hydrophytes

Xerophytes

Plant adapted to live in dry conditions. Common adaptations to reduce the rate of transpiration include:Thick waxy cuticle: The cuticle cuts down water loss in two ways: it acts as a barrier to evaporation and also the shiny surface reflects heat and so lowers temperature.Sunken stomata: Stomata may be sunk in pits in the epidermis; moist air trapped here lengthens the diffusion pathway and reduces evaporation rate.

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Revision help and tips  Biology

This article was written and is updated by the TSR community. You can create your own articles on TSR – or edit the one you're reading.

Revision:Xerophytes and Hydrophytes

Xerophytes

Plant adapted to live in dry conditions. Common adaptations to reduce the rate of transpiration include:Thick waxy cuticle: The cuticle cuts down water loss in two ways: it acts as a barrier to evaporation and also the shiny surface reflects heat and so lowers temperature.Sunken stomata: Stomata may be sunk in pits in the epidermis; moist air trapped here lengthens the diffusion pathway and reduces evaporation rate.Leaf rolled with stomata inside: The inner surface is covered in hairs. The rolled leaf and hairs both serve to trap moist air so reducing transpiration. In addition, a smaller surface area of leaf is exposed to the drying effects of the wind.Small leaves: Many xerophytic plants have small, needle shaped leaves which are often circular in cross section. This reduces the surface area and hence the evaporating surface. Spines protect the plant from animals, shade it from the sun and also collect moisture.Extensive Shallow Root System: Extensive shallow root systems tend to be circular in shape, allowing for the quick absorption of large quantities of water when it rains.

Hydrophytes

Plant adapted to live in extremely wet conditions. Common adaptations to increase the rate of gaseous exchange:Leaf Shape: The submerged leaves are often highly dissected or divided to create a very large surface area for absorption and photosynthesis. It also minimises water resistance and hence potential damage to the leaves. In many cases, the submerged leaves are totally different to floating or emergent leaves on the same plant. The emergent leaves are usually much less divided, if not entire and have a more similar internal structure to those of land plants.



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