The Cactus plant is native to arid and semi-arid regions. It is distinguished by its ‘spines’ which are the modified versions of its leaves. Its leaves are modified to extremely small-sized spines to minimize the surface area from which water can be lost.
What are the modified leaves of a cactus called?
Spines are also modified leaves. In cacti, spines are wholly transformed leaves that protect the plant from herbivores, radiate heat from the stem during the day, and collect and drip condensed water vapour during the cooler night.
What are the leaves of cactus modified into why?
Cacti produce spines, always from areoles as noted above. The leaves of the cactus plant are modified into the spine because it helps them to lose less water during transpiration and also protects them from beings eaten by an animal.
What is the modified part of cactus?
Botanically, “spines” are distinguished from “thorns”: spines are modified leaves, and thorns are modified branches. Cacti produce spines, always from areoles as noted above.
How is cactus plant modified?
The leaves of cactus are modified into spines, to prevent water loss from the surface of leaves. The green stem of the cactus plant contains chlorophyll. Thus, the stem is the centre of photosynthesis in the cactus plants instead of the leaves.
What are the parts of a cactus?
But What are the parts of the cactus like?
- Stem or vascular tissue.
- Fruits and seeds.
Is shoot a modified leaf?
Like leaves and roots, shoots and stems also have modifications. Some examples are rhizomes, stolons, tubers, bulbs, corms, thorns, spines, cladophylls, and stem traps. Buds from the axils of the leaves make new branches that will grow to become aboveground shoots. …
Is cactus a modified stem?
Cacti are plants that have succulent stems, pads or branches with scales and spines instead of leaves. Cactus pads are actually modified stems with a waxy coating. The prickly spines are modified leaves that break up the evaporative winds blowing across pad surfaces, and help shade the stem.
Is cactus a leaf?
What is this? Cacti don’t have leaves but instead have spines with fleshy stems, unlike trees that have quite woody stems. So cacti are not trees.
Do cactuses have leaves?
Cacti have a thick, hard-walled, succulent stem – when it rains, water is stored in the stem. … Instead of leaves, most cacti have spines or scales (which are modified leaves). These spines and scales do not lose water through evaporation (unlike regular leaves, which lose a lot of water).
What is vegetative propagation leaves?
Answer: Begonia and Bryophyllum are examples of vegetative propagation by leaves. This is a form of asexual reproduction in which new plants grow from the buds growing on the margin of the leaves. These buds are reproductive in nature and when they fall on the ground they germinate and form a new plant.
For which physiological function leaves of cactus are modified into spines?
Leaves of cactus plants are modified into spines to reduce loss of water through transpiration.
What are cactus adaptations?
Cacti are well adapted for survival in the desert. They have: Stems that can store water. … The spines also protect the cacti from animals that might eat them. Very thick, waxy cuticle to reduce water loss by evaporation .
How are leaves modified to perform their functions?
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.