Why are cacti not afraid of drought?
Last Update ：2024.06.18
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The reason why cactus in the desert can survive in arid environment is because its root system is very large and can absorb water deep into the ground. Its needle-shaped leaves can slow down the evaporation of water. There is a layer of wax on the surface of the stem that protects it from being sunburned by strong sunlight and causing dehydration.
1. Huge root system
1. Huge root system
The root system of the cactus is very developed. It can not only penetrate deep into the ground, but also spread and grow around. The root systems of some species can grow tens of meters long and penetrate deep into the ground to obtain groundwater. In addition, its root system is relatively strong and the roots are very strong, which can ensure that it will not be unable to absorb water due to root problems.
2. Needle-shaped leaves
Its leaves are needle-shaped, which is due to its degeneration in order to adapt to a living environment that is short of water for a long time. The needle-shaped leaves have a small area, which can effectively reduce water evaporation and help the plant retain more water.
3. Waxy stem
There is a layer of wax on the surface of its stems that protects it from being sunburned by strong sunlight and causing dehydration. In addition, this layer of wax can also slow down the evaporation of water in the plant and help it resist drought.
2. Needle-shaped leaves
3. Waxy stem
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