Xerophytes grow in scarcity of water. So, in order to decrease the rate of transpiration, their leaves are modified into spines or reduced in size.
Why leaves are modified into thorns or spines in Xerophytes?
Leaves are modified into spines in Opuntia (xerophytes) so as to reduce the surface area and minimize rate of water loss by evaporation and transpiration. … Leaves are modified into spines in Opuntia (xerophytes) so as to reduce the surface area and minimize rate of water loss by evaporation and transpiration.
When leaves are reduced to spines This plants are adapted to a?
The leaves of the desert plants are reduced to spines to help to prevent the loss of water by transpiration. Transpiration is the process by which plants give out excess water in the form of vapour from their aerial parts.
What are the advantages of leaves modified into spines in cactus plant?
Answer: Most species of cacti have lost true leaves, retaining only spines, which are highly modified leaves. As well as defending against herbivores, spines help prevent water loss by reducing air flow close to the cactus and providing some shade. In the absence of leaves, enlarged stems carry out photosynthesis.
What is the advantage of sunken stomata for xerophytes?
The sunken stomata creates a small pocket of moist air. The high humidity in the air pocket reduces the water potential gradient between the leaf air spaces and the exterior, and therefore decreases the rate of transpiration.
In which leaves are modified into spines?
Leaves are modified into spines in Opuntia (xerophytes) so as to reduce the surface area and minimize rate of water loss by evaporation and transpiration. Besides, they also provide protection to the plant from grazing animals.
How are leaves modified to suit a purpose?
Leaves can be modified in the form of spines that reduce water loss and also act as a defence. Some are modified into tendrils to provide support to the plant. Some leaves are thick that help in water storage. Some are modified to catch and digest insects.
Why are leaves reduced to spines in desert plant?
Leaves of desert plants are reduced to spines to prevent transpiration.
How does the rate of loss of water get reduced in desert plants?
Answer : Cuticle is a protective waxy covering produced by epidermal cells of leaves and other plant parts. In desert plants, cuticle reduces the rate of water loss through transpiration and helps in conserving water as there is always a shortage of water for desert plants.
How do Xerophytes reduce water loss?
Xerophytic plants often have very thick waxy cuticles surrounding their epidermal tissues (outer cell layers) to prevent water loss by transpiration (water diffusing out of cells and evaporating into the air).
What is an advantage of the leaves being reduced to spines?
Spines lose less water than leaves so are very efficient in a hot climate. Spines also prevent animals from eating the plant. Waxy skin – some leaves have a thick, waxy skin on their surface. This reduces water loss by transpiration .
Which modified form of a leaf reduce loss of water from the plant?
A waxy layer known as the cuticle covers the leaves of all plant species. The cuticle reduces the rate of water loss from the leaf surface.
How does the presence of spines instead of leaves in desert plants useful?
Desert plants lose very little water through transpiration. The leaves in desert plants are either absent, very small, or they are present in the shape of spines. This helps in reducing loss of water from the leaves through transpiration.